<?xml version="1.0" encoding="ISO-8859-1"?><article xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
<front>
<journal-meta>
<journal-id>0188-4999</journal-id>
<journal-title><![CDATA[Revista internacional de contaminación ambiental]]></journal-title>
<abbrev-journal-title><![CDATA[Rev. Int. Contam. Ambient]]></abbrev-journal-title>
<issn>0188-4999</issn>
<publisher>
<publisher-name><![CDATA[Universidad Nacional Autónoma de México, Instituto de Ciencias de la Atmósfera y Cambio Climático]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S0188-49992019000300597</article-id>
<article-id pub-id-type="doi">10.20937/rica.2019.35.03.07</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[EMISIÓN DE N2O, CO2 Y NH3 A PARTIR DE ESTIÉRCOL DE BOVINOS CON DIFERENTE PORCENTAJE DE PROTEÍNA CRUDA EN LA DIETA]]></article-title>
<article-title xml:lang="en"><![CDATA[N2O, CO2 and NH3 EMISSION FROM DUNG OF BOVINE WITH DIFFERENT PERCENTAGE OF CRUDE PROTEIN IN DIET]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Hernández-Tapia]]></surname>
<given-names><![CDATA[Nadia]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Salinas-Ruiz]]></surname>
<given-names><![CDATA[Josafhat]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Saynes-Santillán]]></surname>
<given-names><![CDATA[Vinisa]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Ayala-Rodríguez]]></surname>
<given-names><![CDATA[Julio M.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Hernández-Rosas]]></surname>
<given-names><![CDATA[Francisco]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Velasco-Velasco]]></surname>
<given-names><![CDATA[Joel]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Colegio de Postgraduados  ]]></institution>
<addr-line><![CDATA[Córdoba ]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Colegio de Postgraduados  ]]></institution>
<addr-line><![CDATA[ Estado de México]]></addr-line>
<country>Mexico</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>00</month>
<year>2019</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>00</month>
<year>2019</year>
</pub-date>
<volume>35</volume>
<numero>3</numero>
<fpage>597</fpage>
<lpage>608</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S0188-49992019000300597&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S0188-49992019000300597&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S0188-49992019000300597&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[RESUMEN Se cuantificó la emisión de óxido nitroso (N2O), dióxido de carbono (CO2) y amoniaco (NH3) en excretas de bovinos de raza criollo lechero tropical (CLT) alimentados con diferentes porcentajes de proteína cruda (PC), mediante el uso de cámaras estáticas. El muestreo de gases se realizó a diferentes horas del día (7:00, 10:00, 13:00, 16:00 y 19:00 hora local -HL-). El modelo estadístico usado fue un análisis de covarianza en un diseño de bloques completos al azar con medidas repetidas. La emisión de gases se analizó mediante el procedimiento Glimmix del Statistical Analysis System (SAS) v. 9.2, con una estructura de covarianza de simetría compuesta. El modelo que mejor explica el flujo de N2O-N y la emisión de CO2 y NH3 es aquel que incluyó como covariable la temperatura mínima ambiental y el pH, respectivamente. El tratamiento con 12 % de PC obtuvo el mayor flujo de N2O-N y la menor emisión de CO2. El tratamiento con 14 % de PC tuvo la emisión más baja de N2O y los tratamientos con 14 y 16 % de PC reflejan mayores flujos de emisión de CO2. Las horas del día en que hubo mayor emisión de NH3 fueron las 10:00 y 13:00 HL, que a su vez fueron las horas en que se emitió menor cantidad de CO2 y N2O. Por último, a medida que aumenta el porcentaje de PC en los diferentes tratamientos, hay un incremento en la ganancia en peso del animal, siendo el tratamiento con 16 % de PC, alimento comercial, la dieta que produjo mayor aumento en kilogramos.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[ABSTRACT The emission of nitrous oxide (N2O), carbon dioxide (CO2) and ammonia (NH3) in tropical dairy cattle (CLT) excreta, fed with different percentages of crude protein (CP), was quantified using static cameras. Sampling was performed at different times of day (7:00, 10:00, 13:00, 16:00, and 19:00 local time -LT-). The statistical model employed was a covariance analysis in a randomized complete block design with repeated measures. The variables were analyzed using the Glimmix procedure of the Statistical Analysis System (SAS) v. 9.2 with a covariance structure of compound symmetry. The best model that explains the flow of N2O-N and the emission of CO2 and NH3 is that which included the minimum ambient temperature and the pH as covariates, respectively. Treatment with 12 % of CP obtained the highest N2O-N flow and the lowest CO2 emission. Treatment with 14 % CP had the lowest N2O emission and treatments with 14 and 16 % CP reflected higher amounts of CO2 emissions. The hours of the day when there were greater emissions of NH3 were 10:00 and 13:00 LT, which in turn were the hours where less amount of CO2 and N2O was emitted. As the percentage of CP in the different treatments increases, there is also an increase in the weight gain of the animal, being the treatment with 16 % CP, commercial food, the diet that produced the highest increase in kilograms in animals.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[ganadería]]></kwd>
<kwd lng="es"><![CDATA[manejo]]></kwd>
<kwd lng="es"><![CDATA[contaminación]]></kwd>
<kwd lng="es"><![CDATA[gases]]></kwd>
<kwd lng="en"><![CDATA[livestock]]></kwd>
<kwd lng="en"><![CDATA[management]]></kwd>
<kwd lng="en"><![CDATA[pollution]]></kwd>
<kwd lng="en"><![CDATA[gases]]></kwd>
</kwd-group>
</article-meta>
</front><back>
<ref-list>
<ref id="B1">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Barrow]]></surname>
<given-names><![CDATA[N.J.]]></given-names>
</name>
<name>
<surname><![CDATA[Lambourne]]></surname>
<given-names><![CDATA[L.J.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Partition of excreted nitrogen, sulphur, and phosphorus between the faeces and urine of sheep being fed pasture]]></article-title>
<source><![CDATA[Aust. J. Agr. Res.]]></source>
<year>1962</year>
<volume>13</volume>
<numero>3</numero>
<issue>3</issue>
<page-range>461-71</page-range></nlm-citation>
</ref>
<ref id="B2">
<nlm-citation citation-type="">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Beddington]]></surname>
<given-names><![CDATA[J.]]></given-names>
</name>
<name>
<surname><![CDATA[Asaduzzaman]]></surname>
<given-names><![CDATA[M.]]></given-names>
</name>
<name>
<surname><![CDATA[Clark]]></surname>
<given-names><![CDATA[M.]]></given-names>
</name>
<name>
<surname><![CDATA[Fernández]]></surname>
<given-names><![CDATA[A.]]></given-names>
</name>
<name>
<surname><![CDATA[Guillou]]></surname>
<given-names><![CDATA[M.]]></given-names>
</name>
<name>
<surname><![CDATA[Jahn]]></surname>
<given-names><![CDATA[M.]]></given-names>
</name>
<name>
<surname><![CDATA[Erda]]></surname>
<given-names><![CDATA[L.]]></given-names>
</name>
<name>
<surname><![CDATA[Mamo]]></surname>
<given-names><![CDATA[T.]]></given-names>
</name>
<name>
<surname><![CDATA[Van Bo]]></surname>
<given-names><![CDATA[N.]]></given-names>
</name>
<name>
<surname><![CDATA[Nobre]]></surname>
<given-names><![CDATA[CA.]]></given-names>
</name>
<name>
<surname><![CDATA[Scholes]]></surname>
<given-names><![CDATA[R.]]></given-names>
</name>
<name>
<surname><![CDATA[Sharma]]></surname>
<given-names><![CDATA[R.]]></given-names>
</name>
<name>
<surname><![CDATA[Wakhungu]]></surname>
<given-names><![CDATA[J.]]></given-names>
</name>
</person-group>
<source><![CDATA[Lograr la seguridad alimentaria ante el cambio climático. Resumen para responsables de la política de la Comisión sobre la Agricultura Sostenible y el Cambio Climático. Programa de Investigación del Grupo Consultivo para la Investigación Agrícola Internacional sobre el Cambio Climático, la Agricultura y la Seguridad Alimentaria. Resumen]]></source>
<year>2011</year>
<page-range>20</page-range><publisher-loc><![CDATA[Copenhague, Dinamarca ]]></publisher-loc>
</nlm-citation>
</ref>
<ref id="B3">
<nlm-citation citation-type="book">
<collab>CGA-COLPOS</collab>
<source><![CDATA[Reglamento para el uso y cuidado de animales destinados a la investigación en el Colegio de Postgraduados]]></source>
<year>2016</year>
<page-range>16</page-range><publisher-loc><![CDATA[Montecillo, Estado de México, México ]]></publisher-loc>
<publisher-name><![CDATA[Consejo General Académico del Colegio de Postgraduados]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B4">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Chadwick]]></surname>
<given-names><![CDATA[D.]]></given-names>
</name>
<name>
<surname><![CDATA[Sommer]]></surname>
<given-names><![CDATA[S.]]></given-names>
</name>
<name>
<surname><![CDATA[Thorman]]></surname>
<given-names><![CDATA[R.]]></given-names>
</name>
<name>
<surname><![CDATA[Fangueriro]]></surname>
<given-names><![CDATA[D.]]></given-names>
</name>
<name>
<surname><![CDATA[Cárdenas]]></surname>
<given-names><![CDATA[L.]]></given-names>
</name>
<name>
<surname><![CDATA[Amon]]></surname>
<given-names><![CDATA[B.]]></given-names>
</name>
<name>
<surname><![CDATA[Misselbrook]]></surname>
<given-names><![CDATA[T.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Manure management: Implications for greenhouse gas emissions]]></article-title>
<source><![CDATA[Anim. Feed Sci. Technol.]]></source>
<year>2011</year>
<volume>166-167</volume>
<page-range>514-31</page-range></nlm-citation>
</ref>
<ref id="B5">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Chen]]></surname>
<given-names><![CDATA[D.]]></given-names>
</name>
<name>
<surname><![CDATA[Li]]></surname>
<given-names><![CDATA[Y.]]></given-names>
</name>
<name>
<surname><![CDATA[Grace]]></surname>
<given-names><![CDATA[P.]]></given-names>
</name>
<name>
<surname><![CDATA[Mosier]]></surname>
<given-names><![CDATA[A.R.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[N2O emissions from agricultural lands: A synthesis of simulation approaches]]></article-title>
<source><![CDATA[Plant Soil]]></source>
<year>2008</year>
<volume>309</volume>
<numero>1-2</numero>
<issue>1-2</issue>
<page-range>169-89</page-range></nlm-citation>
</ref>
<ref id="B6">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Davidson]]></surname>
<given-names><![CDATA[E.A]]></given-names>
</name>
<name>
<surname><![CDATA[Keller]]></surname>
<given-names><![CDATA[M.]]></given-names>
</name>
<name>
<surname><![CDATA[Erickson]]></surname>
<given-names><![CDATA[H.E.]]></given-names>
</name>
<name>
<surname><![CDATA[Verchot]]></surname>
<given-names><![CDATA[L.V.]]></given-names>
</name>
<name>
<surname><![CDATA[Veldkamp]]></surname>
<given-names><![CDATA[E.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Testing a conceptual model of soil emissions of nitrous and nitric oxides]]></article-title>
<source><![CDATA[Bioscience]]></source>
<year>2000</year>
<volume>50</volume>
<numero>8</numero>
<issue>8</issue>
<page-range>667-80</page-range></nlm-citation>
</ref>
<ref id="B7">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[De Klein]]></surname>
<given-names><![CDATA[C.A.M.]]></given-names>
</name>
<name>
<surname><![CDATA[Eckard]]></surname>
<given-names><![CDATA[R.J.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Targeted technologies for nitrous oxide abatement from animal agriculture]]></article-title>
<source><![CDATA[Aust. J. Exp. Agric.]]></source>
<year>2008</year>
<volume>48</volume>
<numero>2</numero>
<issue>2</issue>
<page-range>14-20</page-range></nlm-citation>
</ref>
<ref id="B8">
<nlm-citation citation-type="book">
<collab>FAO</collab>
<source><![CDATA[La larga sombra del ganado, problemas ambientales y opciones]]></source>
<year>2006</year>
<page-range>493</page-range><publisher-loc><![CDATA[Roma, Italia ]]></publisher-loc>
<publisher-name><![CDATA[Organización de las Naciones Unidas para la Alimentación y la Agricultura]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B9">
<nlm-citation citation-type="">
<collab>FIRA</collab>
<source><![CDATA[Panorama agroalimentario. Carne de bovino 2017. Fideicomisos Instituidos en Relación con la Agricultura. Reporte]]></source>
<year>2017</year>
<page-range>27</page-range><publisher-loc><![CDATA[Ciudad de México, México ]]></publisher-loc>
</nlm-citation>
</ref>
<ref id="B10">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Franzluebbers]]></surname>
<given-names><![CDATA[K.]]></given-names>
</name>
<name>
<surname><![CDATA[Franzluebbers]]></surname>
<given-names><![CDATA[A.J.]]></given-names>
</name>
<name>
<surname><![CDATA[Jawson]]></surname>
<given-names><![CDATA[M.D.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Environmental controls on soil and whole ecosystem respiration from a tallgrass prairie]]></article-title>
<source><![CDATA[Soil Sci. Soc. Am. J.]]></source>
<year>2002</year>
<volume>66</volume>
<numero>1</numero>
<issue>1</issue>
<page-range>254-62</page-range></nlm-citation>
</ref>
<ref id="B11">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Hellebrand]]></surname>
<given-names><![CDATA[H.J.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Emission of nitrous oxide and other trace gases during composting of grass and green waste]]></article-title>
<source><![CDATA[J. Agr. Eng. Res.]]></source>
<year>1998</year>
<volume>69</volume>
<numero>4</numero>
<issue>4</issue>
<page-range>365-75</page-range></nlm-citation>
</ref>
<ref id="B12">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Herrero]]></surname>
<given-names><![CDATA[M.]]></given-names>
</name>
<name>
<surname><![CDATA[Gerber]]></surname>
<given-names><![CDATA[P.]]></given-names>
</name>
<name>
<surname><![CDATA[Vellinga]]></surname>
<given-names><![CDATA[T.]]></given-names>
</name>
<name>
<surname><![CDATA[Garnett]]></surname>
<given-names><![CDATA[T.]]></given-names>
</name>
<name>
<surname><![CDATA[Leip]]></surname>
<given-names><![CDATA[A.]]></given-names>
</name>
<name>
<surname><![CDATA[Opio]]></surname>
<given-names><![CDATA[C.]]></given-names>
</name>
<name>
<surname><![CDATA[Westhoek]]></surname>
<given-names><![CDATA[H.J.]]></given-names>
</name>
<name>
<surname><![CDATA[Thornton]]></surname>
<given-names><![CDATA[P.K.]]></given-names>
</name>
<name>
<surname><![CDATA[Olesen]]></surname>
<given-names><![CDATA[J.]]></given-names>
</name>
<name>
<surname><![CDATA[Hutchings]]></surname>
<given-names><![CDATA[M.]]></given-names>
</name>
<name>
<surname><![CDATA[Montgomery]]></surname>
<given-names><![CDATA[H.]]></given-names>
</name>
<name>
<surname><![CDATA[Soussana]]></surname>
<given-names><![CDATA[J-F.]]></given-names>
</name>
<name>
<surname><![CDATA[Steinfeld]]></surname>
<given-names><![CDATA[H.]]></given-names>
</name>
<name>
<surname><![CDATA[McAllister]]></surname>
<given-names><![CDATA[T.A.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Livestock and greenhouse gas emissions: The importance of getting the numbers right]]></article-title>
<source><![CDATA[J. Anim. Feed Sci. Tech.]]></source>
<year>2011</year>
<volume>166-167</volume>
<page-range>779-82</page-range></nlm-citation>
</ref>
<ref id="B13">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Herrero]]></surname>
<given-names><![CDATA[M.]]></given-names>
</name>
<name>
<surname><![CDATA[Thornton]]></surname>
<given-names><![CDATA[P.K.]]></given-names>
</name>
<name>
<surname><![CDATA[Gerber]]></surname>
<given-names><![CDATA[P.]]></given-names>
</name>
<name>
<surname><![CDATA[Reid]]></surname>
<given-names><![CDATA[R.S.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Livestock, livelihoods and the environment: Understanding the trade-offs]]></article-title>
<source><![CDATA[Curr. Opin. Environ. Sustain.]]></source>
<year>2009</year>
<volume>1</volume>
<numero>2</numero>
<issue>2</issue>
<page-range>111-20</page-range></nlm-citation>
</ref>
<ref id="B14">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Hovhannisyan]]></surname>
<given-names><![CDATA[S.]]></given-names>
</name>
<name>
<surname><![CDATA[Grigoryan]]></surname>
<given-names><![CDATA[K.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[The main problems and features of the global and local meat production]]></article-title>
<source><![CDATA[Annals of Agrarian Science]]></source>
<year>2016</year>
<volume>14</volume>
<numero>4</numero>
<issue>4</issue>
<page-range>315-8</page-range></nlm-citation>
</ref>
<ref id="B15">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Hutchinson]]></surname>
<given-names><![CDATA[G.L.]]></given-names>
</name>
<name>
<surname><![CDATA[Viets]]></surname>
<given-names><![CDATA[F.G.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Nitrogen enrichment of surface water by absorption of ammonia volatilization from cattle feedlots]]></article-title>
<source><![CDATA[Science]]></source>
<year>1969</year>
<volume>166</volume>
<numero>3904</numero>
<issue>3904</issue>
<page-range>514-5</page-range></nlm-citation>
</ref>
<ref id="B16">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Hutchinson]]></surname>
<given-names><![CDATA[G.L.]]></given-names>
</name>
<name>
<surname><![CDATA[Mosier]]></surname>
<given-names><![CDATA[A.R.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Improved soil cover method for field measurements of nitrous oxide fluxes]]></article-title>
<source><![CDATA[Soil Sci. Soc. Am. J.]]></source>
<year>1981</year>
<volume>45</volume>
<numero>2</numero>
<issue>2</issue>
<page-range>311-6</page-range></nlm-citation>
</ref>
<ref id="B17">
<nlm-citation citation-type="book">
<collab>INECC</collab>
<source><![CDATA[Primer informe bienal de actualización ante la Convención Marco de las Naciones Unidas sobre el Cambio Climático. Informe]]></source>
<year>2015</year>
<page-range>290</page-range><publisher-loc><![CDATA[Ciudad de México, México ]]></publisher-loc>
<publisher-name><![CDATA[Instituto Nacional de Ecología]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B18">
<nlm-citation citation-type="book">
<collab>INEGI</collab>
<source><![CDATA[Prontuario de información geográfica municipal de los Estados Unidos Mexicanos, Amatlán de los Reyes, Veracruz de Ignacio de la Lave. Prontuario]]></source>
<year>2009</year>
<page-range>9</page-range><publisher-loc><![CDATA[Amatlán de los Reyes, Veracruz de Ignacio de la Llave, México ]]></publisher-loc>
<publisher-name><![CDATA[Instituto Nacional de Estadística y Geografía]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B19">
<nlm-citation citation-type="">
<collab>IPCC</collab>
<source><![CDATA[Cambio climático 2014. Informe de Síntesis. Contribución de los grupos de trabajo I, II y III al quinto informe de evaluación del grupo intergubernamental de expertos sobre el cambio climático]]></source>
<year>2014</year>
<page-range>157</page-range><publisher-loc><![CDATA[Ginebra, Suiza ]]></publisher-loc>
</nlm-citation>
</ref>
<ref id="B20">
<nlm-citation citation-type="">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Juárez]]></surname>
<given-names><![CDATA[F.]]></given-names>
</name>
<name>
<surname><![CDATA[Vilaboa]]></surname>
<given-names><![CDATA[J.]]></given-names>
</name>
<name>
<surname><![CDATA[Díaz]]></surname>
<given-names><![CDATA[P.]]></given-names>
</name>
</person-group>
<source><![CDATA[La caña de azúcar (Saccharum officinarum): una alternativa para la sustitución de maíz (Zea Mays) en la alimentación de bovinos de engorda]]></source>
<year>2009</year>
</nlm-citation>
</ref>
<ref id="B21">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Jürgen-Hellebrand]]></surname>
<given-names><![CDATA[H.]]></given-names>
</name>
<name>
<surname><![CDATA[Kalk]]></surname>
<given-names><![CDATA[W.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Emission of methane, nitrous oxide and ammonia from dung windrows]]></article-title>
<source><![CDATA[Nutri. Cycl. Agroecosyst.]]></source>
<year>2001</year>
<volume>60</volume>
<numero>1-3</numero>
<issue>1-3</issue>
<page-range>83-7</page-range></nlm-citation>
</ref>
<ref id="B22">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Kenward]]></surname>
<given-names><![CDATA[M.G.]]></given-names>
</name>
<name>
<surname><![CDATA[Roger]]></surname>
<given-names><![CDATA[H.J.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Small sample inference for fixed effects from restricted maximum likelihood]]></article-title>
<source><![CDATA[Biometrics]]></source>
<year>1997</year>
<volume>53</volume>
<numero>3</numero>
<issue>3</issue>
<page-range>983-97</page-range></nlm-citation>
</ref>
<ref id="B23">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Koneswaran]]></surname>
<given-names><![CDATA[G.]]></given-names>
</name>
<name>
<surname><![CDATA[Nierenberg]]></surname>
<given-names><![CDATA[D.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Global farm animal production and global warming: impacting and mitigating climate change]]></article-title>
<source><![CDATA[J. Environ Health Perspect.]]></source>
<year>2008</year>
<volume>116</volume>
<numero>5</numero>
<issue>5</issue>
<page-range>578-82</page-range></nlm-citation>
</ref>
<ref id="B24">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Loro]]></surname>
<given-names><![CDATA[P.J.]]></given-names>
</name>
<name>
<surname><![CDATA[Bergstrom]]></surname>
<given-names><![CDATA[D.]]></given-names>
</name>
<name>
<surname><![CDATA[Beauchamp]]></surname>
<given-names><![CDATA[E.G.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Intensity and duration of denitrification following application of manure and fertilizer to soil]]></article-title>
<source><![CDATA[J. Environ. Qual.]]></source>
<year>1997</year>
<volume>26</volume>
<numero>3</numero>
<issue>3</issue>
<page-range>706-13</page-range></nlm-citation>
</ref>
<ref id="B25">
<nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Mendoza]]></surname>
<given-names><![CDATA[G.]]></given-names>
</name>
<name>
<surname><![CDATA[Ricalde]]></surname>
<given-names><![CDATA[R.]]></given-names>
</name>
</person-group>
<source><![CDATA[Manual técnico de alimentación de bovinos en clima templado]]></source>
<year>1993</year>
<page-range>76</page-range><publisher-loc><![CDATA[Ciudad de México, México ]]></publisher-loc>
<publisher-name><![CDATA[Universidad Autónoma Metropolitana-Xochimilco]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B26">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Mosier]]></surname>
<given-names><![CDATA[A.]]></given-names>
</name>
<name>
<surname><![CDATA[Kroeze]]></surname>
<given-names><![CDATA[C.]]></given-names>
</name>
<name>
<surname><![CDATA[Nevison]]></surname>
<given-names><![CDATA[C.]]></given-names>
</name>
<name>
<surname><![CDATA[Oenema]]></surname>
<given-names><![CDATA[O.]]></given-names>
</name>
<name>
<surname><![CDATA[Seitzinger]]></surname>
<given-names><![CDATA[S.]]></given-names>
</name>
<name>
<surname><![CDATA[van Cleemput]]></surname>
<given-names><![CDATA[O.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Closing the global N2O Budget: Nitrous oxide emissions through the agricultural nitrogen cycle]]></article-title>
<source><![CDATA[Nutr. Cycling Agroecosyst.]]></source>
<year>1989</year>
<volume>52</volume>
<page-range>225-48</page-range></nlm-citation>
</ref>
<ref id="B27">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Oenema]]></surname>
<given-names><![CDATA[O.]]></given-names>
</name>
<name>
<surname><![CDATA[Wrage]]></surname>
<given-names><![CDATA[N.]]></given-names>
</name>
<name>
<surname><![CDATA[Velthof]]></surname>
<given-names><![CDATA[G.L.]]></given-names>
</name>
<name>
<surname><![CDATA[van Groeningen]]></surname>
<given-names><![CDATA[J.W.]]></given-names>
</name>
<name>
<surname><![CDATA[Dolfing]]></surname>
<given-names><![CDATA[J.]]></given-names>
</name>
<name>
<surname><![CDATA[Kuikman]]></surname>
<given-names><![CDATA[P.J.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Trends in global nitrous oxide emissions from animal production systems]]></article-title>
<source><![CDATA[Nutr. Cycling Agroecosyst.]]></source>
<year>2005</year>
<volume>72</volume>
<numero>1</numero>
<issue>1</issue>
<page-range>51-65</page-range></nlm-citation>
</ref>
<ref id="B28">
<nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Ospina]]></surname>
<given-names><![CDATA[D.]]></given-names>
</name>
<name>
<surname><![CDATA[Sánchez]]></surname>
<given-names><![CDATA[O.]]></given-names>
</name>
<name>
<surname><![CDATA[Montoya]]></surname>
<given-names><![CDATA[S.]]></given-names>
</name>
</person-group>
<source><![CDATA[Estudio de características físico-químicas y grupos de microorganismos durante el proceso de compostaje con y sin adición de roca fosfórica]]></source>
<year>2014</year>
<page-range>87</page-range><publisher-loc><![CDATA[Manizales, Colombia ]]></publisher-loc>
<publisher-name><![CDATA[Facultad de Ciencias Agropecuarias, Universidad de Caldas]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B29">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Philippe]]></surname>
<given-names><![CDATA[F.X.]]></given-names>
</name>
<name>
<surname><![CDATA[Laitat]]></surname>
<given-names><![CDATA[M.]]></given-names>
</name>
<name>
<surname><![CDATA[Canart]]></surname>
<given-names><![CDATA[B.]]></given-names>
</name>
<name>
<surname><![CDATA[Vandenheede]]></surname>
<given-names><![CDATA[M.]]></given-names>
</name>
<name>
<surname><![CDATA[Nicks]]></surname>
<given-names><![CDATA[B.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Comparison of ammonia and greenhouse gas emissions during the fattening of pigs, kept either on fully slatted floor or on deep litter]]></article-title>
<source><![CDATA[Livest. Sci.]]></source>
<year>2007</year>
<volume>111</volume>
<numero>1-2</numero>
<issue>1-2</issue>
<page-range>144-52</page-range></nlm-citation>
</ref>
<ref id="B30">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Powell]]></surname>
<given-names><![CDATA[J.M.]]></given-names>
</name>
<name>
<surname><![CDATA[Broderick]]></surname>
<given-names><![CDATA[G.A.]]></given-names>
</name>
<name>
<surname><![CDATA[Misselbrook]]></surname>
<given-names><![CDATA[T.H.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Seasonal diet affects ammonia emissions from tie-stall dairy barns]]></article-title>
<source><![CDATA[J. Dairy Sci.]]></source>
<year>2008</year>
<volume>91</volume>
<numero>2</numero>
<issue>2</issue>
<page-range>857-69</page-range></nlm-citation>
</ref>
<ref id="B31">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Ramos]]></surname>
<given-names><![CDATA[E.]]></given-names>
</name>
<name>
<surname><![CDATA[Zúñiga]]></surname>
<given-names><![CDATA[D.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Efecto de la humedad, temperatura y pH del suelo en la actividad microbiana a nivel de laboratorio]]></article-title>
<source><![CDATA[Ecología Aplicada]]></source>
<year>2008</year>
<volume>7</volume>
<numero>1-2</numero>
<issue>1-2</issue>
<page-range>123-30</page-range></nlm-citation>
</ref>
<ref id="B32">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Ryden]]></surname>
<given-names><![CDATA[J.C.]]></given-names>
</name>
<name>
<surname><![CDATA[Whitehead]]></surname>
<given-names><![CDATA[D.C.]]></given-names>
</name>
<name>
<surname><![CDATA[Lockyer]]></surname>
<given-names><![CDATA[D.R.]]></given-names>
</name>
<name>
<surname><![CDATA[Thompson]]></surname>
<given-names><![CDATA[R.B.]]></given-names>
</name>
<name>
<surname><![CDATA[Skinner]]></surname>
<given-names><![CDATA[J.H.]]></given-names>
</name>
<name>
<surname><![CDATA[Garwood]]></surname>
<given-names><![CDATA[E.A.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Ammonia emission from grassland and livestock production systems in the UK]]></article-title>
<source><![CDATA[Envir. Pollut.]]></source>
<year>1987</year>
<volume>48</volume>
<numero>3</numero>
<issue>3</issue>
<page-range>173-84</page-range></nlm-citation>
</ref>
<ref id="B33">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Sánchez-Martin]]></surname>
<given-names><![CDATA[L.]]></given-names>
</name>
<name>
<surname><![CDATA[Vallejo]]></surname>
<given-names><![CDATA[A.]]></given-names>
</name>
<name>
<surname><![CDATA[Dick]]></surname>
<given-names><![CDATA[J.]]></given-names>
</name>
<name>
<surname><![CDATA[Skiba]]></surname>
<given-names><![CDATA[U.M.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[The influence of soluble carbon and fertilizer nitrogen on nitric oxide and nitrous oxide emissions from two contrasting agricultural soils]]></article-title>
<source><![CDATA[Soil Biol. Biochem]]></source>
<year>2008</year>
<volume>40</volume>
<numero>1</numero>
<issue>1</issue>
<page-range>142-51</page-range></nlm-citation>
</ref>
<ref id="B34">
<nlm-citation citation-type="book">
<collab>Santillana-El País</collab>
<source><![CDATA[La enciclopedia del estudiante]]></source>
<year>2005</year>
<page-range>359</page-range><publisher-loc><![CDATA[Madrid, España ]]></publisher-loc>
<publisher-name><![CDATA[Geografía general]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B35">
<nlm-citation citation-type="journal">
<collab>SEMARNAT</collab>
<article-title xml:lang=""><![CDATA[Norma Oficial Mexicana NOM-021-RECNAT-2000. Especificaciones de fertilidad, salinidad y clasificación de suelos]]></article-title>
<source><![CDATA[Estudios, muestreo y análisis. Secretaría de Medio Ambiente, Recursos Naturales y Pesca. Diario Oficial de la Federación, 31 de diciembre]]></source>
<year>2002</year>
</nlm-citation>
</ref>
<ref id="B36">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Serrano-Silva]]></surname>
<given-names><![CDATA[N.]]></given-names>
</name>
<name>
<surname><![CDATA[Luna-Guido]]></surname>
<given-names><![CDATA[M.]]></given-names>
</name>
<name>
<surname><![CDATA[Fernández-Luqueño]]></surname>
<given-names><![CDATA[F.]]></given-names>
</name>
<name>
<surname><![CDATA[Marsch]]></surname>
<given-names><![CDATA[R.]]></given-names>
</name>
<name>
<surname><![CDATA[Densooven]]></surname>
<given-names><![CDATA[L.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Emission of greenhouse gases from an agricultural soil amended with urea: A laboratory study]]></article-title>
<source><![CDATA[Appl. Soil Ecol.]]></source>
<year>2011</year>
<volume>47</volume>
<numero>2</numero>
<issue>2</issue>
<page-range>92-7</page-range></nlm-citation>
</ref>
<ref id="B37">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Singurindy]]></surname>
<given-names><![CDATA[O.]]></given-names>
</name>
<name>
<surname><![CDATA[Molodovskaya]]></surname>
<given-names><![CDATA[M.]]></given-names>
</name>
<name>
<surname><![CDATA[Richards]]></surname>
<given-names><![CDATA[B.K.]]></given-names>
</name>
<name>
<surname><![CDATA[Steenhuis]]></surname>
<given-names><![CDATA[T.S.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Nitrous oxide emission at low temperatures from manure-amended soils under corn (Zean mays L.)]]></article-title>
<source><![CDATA[Agr. Ecosyst. Environ.]]></source>
<year>2009</year>
<volume>132</volume>
<numero>1-2</numero>
<issue>1-2</issue>
<page-range>74-81</page-range></nlm-citation>
</ref>
<ref id="B38">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Steinfeld]]></surname>
<given-names><![CDATA[H.]]></given-names>
</name>
<name>
<surname><![CDATA[Wassenaar]]></surname>
<given-names><![CDATA[T.]]></given-names>
</name>
<name>
<surname><![CDATA[Jutzi]]></surname>
<given-names><![CDATA[S.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Livestock production systems in developing countries: Status, drivers, trends]]></article-title>
<source><![CDATA[Rev. Sci. Rech. Off. Int. Epiz.]]></source>
<year>2006</year>
<volume>25</volume>
<numero>2</numero>
<issue>2</issue>
<page-range>505-16</page-range></nlm-citation>
</ref>
<ref id="B39">
<nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Sutton]]></surname>
<given-names><![CDATA[M.]]></given-names>
</name>
<name>
<surname><![CDATA[Reis]]></surname>
<given-names><![CDATA[S.]]></given-names>
</name>
<name>
<surname><![CDATA[Baker]]></surname>
<given-names><![CDATA[S.]]></given-names>
</name>
</person-group>
<source><![CDATA[Atmospheric ammonia. Detecting emission changes and environmental impacts. Results of an expert workshop under the convention on long-range transboundary air pollution]]></source>
<year>2009</year>
<page-range>464</page-range><publisher-loc><![CDATA[Escocia, Reino Unido ]]></publisher-loc>
<publisher-name><![CDATA[Springer]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B40">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Tian]]></surname>
<given-names><![CDATA[H.]]></given-names>
</name>
<name>
<surname><![CDATA[Xu]]></surname>
<given-names><![CDATA[X.]]></given-names>
</name>
<name>
<surname><![CDATA[Lu]]></surname>
<given-names><![CDATA[C]]></given-names>
</name>
<name>
<surname><![CDATA[Liu]]></surname>
<given-names><![CDATA[M.]]></given-names>
</name>
<name>
<surname><![CDATA[Ren]]></surname>
<given-names><![CDATA[W.]]></given-names>
</name>
<name>
<surname><![CDATA[Chen]]></surname>
<given-names><![CDATA[G.]]></given-names>
</name>
<name>
<surname><![CDATA[Melillo]]></surname>
<given-names><![CDATA[J.]]></given-names>
</name>
<name>
<surname><![CDATA[Liu]]></surname>
<given-names><![CDATA[J.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Net exchanges of CO2, CH4, and N2O between China&#8217;s terrestrial ecosystems and the atmosphere and their contributions to global climate warming]]></article-title>
<source><![CDATA[J. Geophys. Res.]]></source>
<year>2011</year>
<volume>116</volume>
<numero>G02011</numero>
<issue>G02011</issue>
</nlm-citation>
</ref>
<ref id="B41">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Velasco-Velasco]]></surname>
<given-names><![CDATA[J.]]></given-names>
</name>
<name>
<surname><![CDATA[Parkinson]]></surname>
<given-names><![CDATA[R.]]></given-names>
</name>
<name>
<surname><![CDATA[Kuri]]></surname>
<given-names><![CDATA[V.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Ammonia emissions during vermicomposting of sheep manure]]></article-title>
<source><![CDATA[Bioresour. Technol.]]></source>
<year>2011</year>
<volume>102</volume>
<numero>23</numero>
<issue>23</issue>
<page-range>10959-64</page-range></nlm-citation>
</ref>
<ref id="B42">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Venterea]]></surname>
<given-names><![CDATA[R.T.]]></given-names>
</name>
<name>
<surname><![CDATA[Burger]]></surname>
<given-names><![CDATA[M.]]></given-names>
</name>
<name>
<surname><![CDATA[Spokas]]></surname>
<given-names><![CDATA[K.A.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Nitrogen oxide and methane emissions under varying tillage and fertilizer management]]></article-title>
<source><![CDATA[J. Environ. Qual.]]></source>
<year>2005</year>
<volume>34</volume>
<numero>5</numero>
<issue>5</issue>
<page-range>1467-77</page-range></nlm-citation>
</ref>
<ref id="B43">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Wang]]></surname>
<given-names><![CDATA[Z.]]></given-names>
</name>
<name>
<surname><![CDATA[Goonewardene]]></surname>
<given-names><![CDATA[L.A.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[The use of MIXED models in the analysis of animal experiments with repeated measures data]]></article-title>
<source><![CDATA[Can. J. Anim. Sci.]]></source>
<year>2004</year>
<volume>84</volume>
<numero>1</numero>
<issue>1</issue>
<page-range>1-11</page-range></nlm-citation>
</ref>
</ref-list>
</back>
</article>
