<?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>2007-1124</journal-id>
<journal-title><![CDATA[Revista mexicana de ciencias pecuarias]]></journal-title>
<abbrev-journal-title><![CDATA[Rev. mex. de cienc. pecuarias]]></abbrev-journal-title>
<issn>2007-1124</issn>
<publisher>
<publisher-name><![CDATA[Instituto Nacional de Investigaciones Forestales, Agrícolas y Pecuarias]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S2007-11242016000300293</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Estimación Tier II de emisión de metano entérico en hatos de vacas lactantes en Querétaro, México]]></article-title>
<article-title xml:lang="en"><![CDATA[Tier II estimation of enteric methane emission in dairy cow herds in Querétaro, México]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Morante López]]></surname>
<given-names><![CDATA[Daniela]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Guevara Escobar]]></surname>
<given-names><![CDATA[Aurelio]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Suzán Azpiri]]></surname>
<given-names><![CDATA[Humberto]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Lemus Ramírez]]></surname>
<given-names><![CDATA[Vicente]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Sosa Ferreyra]]></surname>
<given-names><![CDATA[Carlos Francisco]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Universidad Autónoma de Querétaro Facultad de Ciencias Naturales ]]></institution>
<addr-line><![CDATA[ Querétaro]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Universidad Nacional Autónoma de México Facultad de Medicina Veterinaria y Zootecnia ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>Mexico</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>09</month>
<year>2016</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>09</month>
<year>2016</year>
</pub-date>
<volume>7</volume>
<numero>3</numero>
<fpage>293</fpage>
<lpage>308</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S2007-11242016000300293&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S2007-11242016000300293&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S2007-11242016000300293&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen El metano (CH4) contribuye al cambio climático y su fuente antropogénica más importante es la fermentación entérica del ganado. A nivel continental el Panel Intergubernamental de Cambio Climático establece factores de emisión entérica de CH4 por defecto (Tier I); pero las decisiones y evaluación de la mitigación necesitan estimaciones más exactas. Así, el objetivo fue calcular la emisión de metano entérico de hatos de vacas Holstein-Friesian en Querétaro, México con datos de pesaje de leche (Tier II). Las curvas de lactación se modelaron con la función gamma incompleta por lactancia y hato. Un total de 11,092 lactancias del 2007 tuvieron un rendimiento ajustado a 305 días (d) de 9,985 kg leche. La curva de lactancia fue diferente entre primíparas y multíparas; la duración de la lactancia fue 365±21 días. Durante la lactancia, la emisión entérica para primíparas y multíparas a 305 días fue 165.7±3.8 y 181.6±8.3 kg CH4 vaca-1; a 365 d fue de 201.8±4.6 y 223.7±11.0 kg CH4 vaca-1 (P&lt;0.0025). La intensidad de emisión entérica fue semejante entre primíparas y multíparas (18 y 19 g CH4 kg-1 leche), similar a lo reportado en la literatura para vacas de alta producción intensiva. Los registros de rendimiento fueron útiles para caracterizar el rendimiento, duración de la lactancia y el efecto de número de lactancia en su influencia sobre los estimados de intensidad de emisión entérica.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract Methane (CH4) contributes to climatic change and livestock enteric fermentation is the most important anthropogenic source. The Intergovernmental Panel on Climate Change establishes continental default emission factors for enteric methane (Tier I); but decisions and evaluation of mitigation needs more precise estimates. Therefore, the objective was to calculate the enteric emission of Holstein-Friesian herds in Queretaro, México using milk test-day records (Tier II). Lactation curves were modeled using the incomplete gamma function according to lactation number and herd. A total of 11,092 lactations from 2007 had an average 305 d milk yield of 9,985 kg. Lactation curve was different between primiparous and multiparous; average days in milk were 365±21 d. During lactation, the primiparous and multiparous enteric emission at 305 d was 165.7±3.8 and 181.6±8.3 kg CH4 head-1; at 365 d was 201.8±4.6 and 223.7±11.0 kg CH4 head-1 (P&lt;0.0025). Enteric emission intensity was similar between primiparous and multiparous (18 and 19 g CH4 kg-1 milk), similar to reports in the literature for high yielding cows. Test day records were useful to characterize yield, days in milk and parity influencing the estimates of enteric emission intensity.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[Cambio climático]]></kwd>
<kwd lng="es"><![CDATA[Factor de emisión]]></kwd>
<kwd lng="es"><![CDATA[GEI]]></kwd>
<kwd lng="es"><![CDATA[Mitigación]]></kwd>
<kwd lng="es"><![CDATA[Metano]]></kwd>
<kwd lng="en"><![CDATA[Climatic change]]></kwd>
<kwd lng="en"><![CDATA[Emission factor]]></kwd>
<kwd lng="en"><![CDATA[GHG]]></kwd>
<kwd lng="en"><![CDATA[Mitigation]]></kwd>
<kwd lng="en"><![CDATA[Methane]]></kwd>
</kwd-group>
</article-meta>
</front><back>
<ref-list>
<ref id="B1">
<nlm-citation citation-type="confpro">
<collab>INECC</collab>
<source><![CDATA[México quinta comunicación nacional]]></source>
<year>2012</year>
<conf-name><![CDATA[ convención marco de las Naciones Unidas sobre el cambio climático]]></conf-name>
<conf-loc>DF, México </conf-loc>
</nlm-citation>
</ref>
<ref id="B2">
<nlm-citation citation-type="journal">
<article-title xml:lang=""><![CDATA[Improved attribution of climate forcing to emissions]]></article-title>
<person-group person-group-type="author">
<name>
<surname><![CDATA[Shindell]]></surname>
<given-names><![CDATA[TD]]></given-names>
</name>
<name>
<surname><![CDATA[Faluvegi]]></surname>
<given-names><![CDATA[G]]></given-names>
</name>
<name>
<surname><![CDATA[Koch]]></surname>
<given-names><![CDATA[MD]]></given-names>
</name>
<name>
<surname><![CDATA[Schmidt]]></surname>
<given-names><![CDATA[AG]]></given-names>
</name>
<name>
<surname><![CDATA[Unger]]></surname>
<given-names><![CDATA[N]]></given-names>
</name>
<name>
<surname><![CDATA[Bauer]]></surname>
<given-names><![CDATA[ES]]></given-names>
</name>
</person-group>
<source><![CDATA[Science]]></source>
<year>2009</year>
<volume>326</volume>
<numero>5953</numero>
<issue>5953</issue>
<page-range>716-8</page-range></nlm-citation>
</ref>
<ref id="B3">
<nlm-citation citation-type="book">
<collab>FAO</collab>
<source><![CDATA[Food and Agriculture Organization of the United Nations. Livestock's long shadow]]></source>
<year>2006</year>
<publisher-loc><![CDATA[Italy ]]></publisher-loc>
<publisher-name><![CDATA[Food and Agriculture Organization of the United Nations]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B4">
<nlm-citation citation-type="journal">
<article-title xml:lang=""><![CDATA[Questioning key conclusions of FAO publications 'Livestock's long shadow' (2006) appearing again in 'Tackling climate change through livestock' (2013)]]></article-title>
<person-group person-group-type="author">
<name>
<surname><![CDATA[Glatzle]]></surname>
<given-names><![CDATA[A]]></given-names>
</name>
</person-group>
<source><![CDATA[Pastor Res Policy Pract]]></source>
<year>2014</year>
<volume>4</volume>
<numero>1</numero>
<issue>1</issue>
<page-range>1-6</page-range></nlm-citation>
</ref>
<ref id="B5">
<nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Reddy]]></surname>
<given-names><![CDATA[PP]]></given-names>
</name>
</person-group>
<source><![CDATA[Climate resilient agriculture for ensuring food security]]></source>
<year>2015</year>
<publisher-loc><![CDATA[India ]]></publisher-loc>
<publisher-name><![CDATA[Springer]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B6">
<nlm-citation citation-type="confpro">
<collab>INE</collab>
<source><![CDATA[México cuarta comunicación nacional]]></source>
<year>2009</year>
<conf-name><![CDATA[ convención marco de las Naciones Unidas sobre el cambio climático]]></conf-name>
<conf-loc>DF, México </conf-loc>
</nlm-citation>
</ref>
<ref id="B7">
<nlm-citation citation-type="journal">
<article-title xml:lang=""><![CDATA[Benchmarking of greenhouse gas emissions of bovine milk production systems for 38 countries]]></article-title>
<person-group person-group-type="author">
<name>
<surname><![CDATA[Hagemann]]></surname>
<given-names><![CDATA[M]]></given-names>
</name>
<name>
<surname><![CDATA[Hemme]]></surname>
<given-names><![CDATA[T]]></given-names>
</name>
<name>
<surname><![CDATA[Ddambi]]></surname>
<given-names><![CDATA[A]]></given-names>
</name>
<name>
<surname><![CDATA[Alqaisi]]></surname>
<given-names><![CDATA[O]]></given-names>
</name>
<name>
<surname><![CDATA[Sultana]]></surname>
<given-names><![CDATA[MN]]></given-names>
</name>
</person-group>
<source><![CDATA[Anim Feed Sci Technol]]></source>
<year>2011</year>
<numero>166-167</numero>
<issue>166-167</issue>
<page-range>46-58</page-range></nlm-citation>
</ref>
<ref id="B8">
<nlm-citation citation-type="journal">
<article-title xml:lang=""><![CDATA[Historical emissions, by country, of N2O from animal manure management and of CH4 from enteric fermentation in domestic livestock]]></article-title>
<person-group person-group-type="author">
<name>
<surname><![CDATA[Muylaert de Araujo]]></surname>
<given-names><![CDATA[MS]]></given-names>
</name>
<name>
<surname><![CDATA[Pires de Campos]]></surname>
<given-names><![CDATA[C.]]></given-names>
</name>
<name>
<surname><![CDATA[Pinguelli]]></surname>
<given-names><![CDATA[RL]]></given-names>
</name>
</person-group>
<source><![CDATA[Clim Res]]></source>
<year>2007</year>
<volume>34</volume>
<numero>3</numero>
<issue>3</issue>
<page-range>253-8</page-range></nlm-citation>
</ref>
<ref id="B9">
<nlm-citation citation-type="journal">
<article-title xml:lang=""><![CDATA[Trends in greenhouse gas emissions from dairy cattle in Mexico between 1970 and 2010]]></article-title>
<person-group person-group-type="author">
<name>
<surname><![CDATA[Rendón-Huerta]]></surname>
<given-names><![CDATA[JA]]></given-names>
</name>
<name>
<surname><![CDATA[Pinos-Rodríguez]]></surname>
<given-names><![CDATA[JM]]></given-names>
</name>
<name>
<surname><![CDATA[García López]]></surname>
<given-names><![CDATA[JC]]></given-names>
</name>
<name>
<surname><![CDATA[Yáñez-Estrada]]></surname>
<given-names><![CDATA[LG]]></given-names>
</name>
<name>
<surname><![CDATA[Kebreab]]></surname>
<given-names><![CDATA[E]]></given-names>
</name>
</person-group>
<source><![CDATA[Anim Prod Sci]]></source>
<year>2013</year>
<volume>54</volume>
<numero>3</numero>
<issue>3</issue>
<page-range>292-8</page-range></nlm-citation>
</ref>
<ref id="B10">
<nlm-citation citation-type="journal">
<article-title xml:lang=""><![CDATA[Modeling methane emissions from cattle in Mexico]]></article-title>
<person-group person-group-type="author">
<name>
<surname><![CDATA[Ruiz-Suárez]]></surname>
<given-names><![CDATA[LG]]></given-names>
</name>
<name>
<surname><![CDATA[González-Avalos]]></surname>
<given-names><![CDATA[E]]></given-names>
</name>
</person-group>
<source><![CDATA[Sci Total Environ]]></source>
<year>1997</year>
<volume>206</volume>
<numero>2-3</numero>
<issue>2-3</issue>
<page-range>177-86</page-range></nlm-citation>
</ref>
<ref id="B11">
<nlm-citation citation-type="book">
<collab>IPCC</collab>
<source><![CDATA[2006 IPCC Guidelines for national greenhouse gas inventories]]></source>
<year>2006</year>
<publisher-loc><![CDATA[Hayama, Japan ]]></publisher-loc>
<publisher-name><![CDATA[Institute for Global Environmental Strategies]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B12">
<nlm-citation citation-type="journal">
<article-title xml:lang=""><![CDATA[Productivity gains and greenhouse gas emissions intensity in dairy systems]]></article-title>
<person-group person-group-type="author">
<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[Opio]]></surname>
<given-names><![CDATA[C]]></given-names>
</name>
<name>
<surname><![CDATA[Steinfeld]]></surname>
<given-names><![CDATA[H]]></given-names>
</name>
</person-group>
<source><![CDATA[Livestock Sci]]></source>
<year>2011</year>
<volume>139</volume>
<numero>1-2</numero>
<issue>1-2</issue>
<page-range>100-8</page-range></nlm-citation>
</ref>
<ref id="B13">
<nlm-citation citation-type="journal">
<article-title xml:lang=""><![CDATA[Enteric methane in dairy cattle production Quantifying the opportunities and impact of reducing emissions]]></article-title>
<person-group person-group-type="author">
<name>
<surname><![CDATA[Knapp]]></surname>
<given-names><![CDATA[JR]]></given-names>
</name>
<name>
<surname><![CDATA[Laur]]></surname>
<given-names><![CDATA[GL]]></given-names>
</name>
<name>
<surname><![CDATA[Vadas]]></surname>
<given-names><![CDATA[PA]]></given-names>
</name>
<name>
<surname><![CDATA[Weiss]]></surname>
<given-names><![CDATA[WP]]></given-names>
</name>
<name>
<surname><![CDATA[Tricarico]]></surname>
<given-names><![CDATA[JM]]></given-names>
</name>
</person-group>
<source><![CDATA[J Dairy Sci]]></source>
<year>2014</year>
<volume>97</volume>
<numero>6</numero>
<issue>6</issue>
<page-range>3231-61</page-range></nlm-citation>
</ref>
<ref id="B14">
<nlm-citation citation-type="journal">
<article-title xml:lang=""><![CDATA[Best prediction of yields for long lactations]]></article-title>
<person-group person-group-type="author">
<name>
<surname><![CDATA[Cole]]></surname>
<given-names><![CDATA[JB]]></given-names>
</name>
<name>
<surname><![CDATA[Null]]></surname>
<given-names><![CDATA[DJ]]></given-names>
</name>
<name>
<surname><![CDATA[VanRaden]]></surname>
<given-names><![CDATA[PM]]></given-names>
</name>
</person-group>
<source><![CDATA[J Dairy Sci]]></source>
<year>2009</year>
<volume>92</volume>
<numero>4</numero>
<issue>4</issue>
<page-range>1796-810</page-range></nlm-citation>
</ref>
<ref id="B15">
<nlm-citation citation-type="journal">
<article-title xml:lang=""><![CDATA[Modeling extended lactations of Holsteins]]></article-title>
<person-group person-group-type="author">
<name>
<surname><![CDATA[Dematawea]]></surname>
<given-names><![CDATA[CMB]]></given-names>
</name>
<name>
<surname><![CDATA[Pearson]]></surname>
<given-names><![CDATA[RE]]></given-names>
</name>
<name>
<surname><![CDATA[VanRaden]]></surname>
<given-names><![CDATA[PM]]></given-names>
</name>
</person-group>
<source><![CDATA[J Dairy Sci]]></source>
<year>2007</year>
<volume>90</volume>
<numero>8</numero>
<issue>8</issue>
<page-range>3924-36</page-range></nlm-citation>
</ref>
<ref id="B16">
<nlm-citation citation-type="journal">
<article-title xml:lang=""><![CDATA[Algebraic model of the lactation curve in cattle]]></article-title>
<person-group person-group-type="author">
<name>
<surname><![CDATA[Wood]]></surname>
<given-names><![CDATA[PDP]]></given-names>
</name>
</person-group>
<source><![CDATA[Nature]]></source>
<year>1967</year>
<volume>216</volume>
<numero>5111</numero>
<issue>5111</issue>
<page-range>164-5</page-range></nlm-citation>
</ref>
<ref id="B17">
<nlm-citation citation-type="journal">
<article-title xml:lang=""><![CDATA[Study of the lactation curve in dairy cattle on farms in central Mexico]]></article-title>
<person-group person-group-type="author">
<name>
<surname><![CDATA[Val-Arreola]]></surname>
<given-names><![CDATA[D]]></given-names>
</name>
<name>
<surname><![CDATA[Kebreab]]></surname>
<given-names><![CDATA[E]]></given-names>
</name>
<name>
<surname><![CDATA[Dijkstra]]></surname>
<given-names><![CDATA[J]]></given-names>
</name>
<name>
<surname><![CDATA[France]]></surname>
<given-names><![CDATA[J]]></given-names>
</name>
</person-group>
<source><![CDATA[J Dairy Sci]]></source>
<year>2004</year>
<volume>87</volume>
<numero>11</numero>
<issue>11</issue>
<page-range>3789-99</page-range></nlm-citation>
</ref>
<ref id="B18">
<nlm-citation citation-type="journal">
<article-title xml:lang=""><![CDATA[Multiple comparison methods for means]]></article-title>
<person-group person-group-type="author">
<name>
<surname><![CDATA[Rafter]]></surname>
<given-names><![CDATA[AJ]]></given-names>
</name>
<name>
<surname><![CDATA[Abell]]></surname>
<given-names><![CDATA[LM]]></given-names>
</name>
<name>
<surname><![CDATA[Braselton]]></surname>
<given-names><![CDATA[PJ]]></given-names>
</name>
</person-group>
<source><![CDATA[SIAM Rev]]></source>
<year>2002</year>
<volume>44</volume>
<numero>2</numero>
<issue>2</issue>
<page-range>259-78</page-range></nlm-citation>
</ref>
<ref id="B19">
<nlm-citation citation-type="journal">
<article-title xml:lang=""><![CDATA[Enteric methane emissions from German dairy cows]]></article-title>
<person-group person-group-type="author">
<name>
<surname><![CDATA[Dämmgen]]></surname>
<given-names><![CDATA[U]]></given-names>
</name>
<name>
<surname><![CDATA[Rösemann]]></surname>
<given-names><![CDATA[C]]></given-names>
</name>
<name>
<surname><![CDATA[Haenel]]></surname>
<given-names><![CDATA[HD]]></given-names>
</name>
<name>
<surname><![CDATA[Hutchings]]></surname>
<given-names><![CDATA[NJ]]></given-names>
</name>
</person-group>
<source><![CDATA[Landbauforschung - vTI Agric For Res]]></source>
<year>2012</year>
<volume>62</volume>
<numero>1-2</numero>
<issue>1-2</issue>
<page-range>21-32</page-range></nlm-citation>
</ref>
<ref id="B20">
<nlm-citation citation-type="journal">
<article-title xml:lang=""><![CDATA[Model for estimating enteric methane emissions from United States dairy and feedlot cattle]]></article-title>
<person-group person-group-type="author">
<name>
<surname><![CDATA[Kebreab]]></surname>
<given-names><![CDATA[E]]></given-names>
</name>
<name>
<surname><![CDATA[Johnson]]></surname>
<given-names><![CDATA[KA]]></given-names>
</name>
<name>
<surname><![CDATA[Archibeque]]></surname>
<given-names><![CDATA[SL]]></given-names>
</name>
<name>
<surname><![CDATA[Pape]]></surname>
<given-names><![CDATA[D]]></given-names>
</name>
<name>
<surname><![CDATA[Wirth]]></surname>
<given-names><![CDATA[T]]></given-names>
</name>
</person-group>
<source><![CDATA[J Anim Sci]]></source>
<year>2008</year>
<volume>86</volume>
<numero>10</numero>
<issue>10</issue>
<page-range>2738-48</page-range></nlm-citation>
</ref>
<ref id="B21">
<nlm-citation citation-type="book">
<collab>NRC</collab>
<source><![CDATA[Nutrient Requirements of Dairy Cattle]]></source>
<year>2001</year>
<edition>7</edition>
<publisher-loc><![CDATA[USA ]]></publisher-loc>
<publisher-name><![CDATA[National Academy of Sciences]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B22">
<nlm-citation citation-type="book">
<article-title xml:lang=""><![CDATA[Agriculture]]></article-title>
<collab>IPCC. Intergovernmental Panel on Climate Change</collab>
<source><![CDATA[Good practice guidance and uncertainty management in national greenhouse gas inventories]]></source>
<year>2000</year>
<publisher-loc><![CDATA[Hayama, Japan ]]></publisher-loc>
<publisher-name><![CDATA[Institute for Global Environmental Strategies]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B23">
<nlm-citation citation-type="journal">
<article-title xml:lang=""><![CDATA[Effect of lactation number, year, and season of initiation of lactation on milk yield of cows hormonally induced into lactation and treated with recombinant bovine somatotropin]]></article-title>
<person-group person-group-type="author">
<name>
<surname><![CDATA[Mellado]]></surname>
<given-names><![CDATA[M]]></given-names>
</name>
<name>
<surname><![CDATA[Antonio- Chirino]]></surname>
<given-names><![CDATA[E]]></given-names>
</name>
<name>
<surname><![CDATA[Meza-Herrera]]></surname>
<given-names><![CDATA[C]]></given-names>
</name>
<name>
<surname><![CDATA[Veliz]]></surname>
<given-names><![CDATA[FG]]></given-names>
</name>
<name>
<surname><![CDATA[Arévalo]]></surname>
<given-names><![CDATA[JR]]></given-names>
</name>
<name>
<surname><![CDATA[Mellado]]></surname>
<given-names><![CDATA[J]]></given-names>
</name>
<name>
<surname><![CDATA[de Santiago]]></surname>
<given-names><![CDATA[A]]></given-names>
</name>
</person-group>
<source><![CDATA[J Dairy Sci]]></source>
<year>2011</year>
<volume>94</volume>
<numero>9</numero>
<issue>9</issue>
<page-range>4524-30</page-range></nlm-citation>
</ref>
<ref id="B24">
<nlm-citation citation-type="journal">
<article-title xml:lang=""><![CDATA[Emissions of organic carbon and methane from petroleum and dairy operations in California's San Joaquin Valley]]></article-title>
<person-group person-group-type="author">
<name>
<surname><![CDATA[Gentner]]></surname>
<given-names><![CDATA[DR]]></given-names>
</name>
<name>
<surname><![CDATA[Ford]]></surname>
<given-names><![CDATA[TB]]></given-names>
</name>
<name>
<surname><![CDATA[Guha]]></surname>
<given-names><![CDATA[A]]></given-names>
</name>
<name>
<surname><![CDATA[Boulanger]]></surname>
<given-names><![CDATA[K]]></given-names>
</name>
<name>
<surname><![CDATA[Brioude]]></surname>
<given-names><![CDATA[J]]></given-names>
</name>
<name>
<surname><![CDATA[Angevine]]></surname>
<given-names><![CDATA[WM]]></given-names>
</name>
</person-group>
<source><![CDATA[Atmos Chem Phys]]></source>
<year>2014</year>
<volume>14</volume>
<numero>10</numero>
<issue>10</issue>
<page-range>4955-78</page-range></nlm-citation>
</ref>
<ref id="B25">
<nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Mariscal]]></surname>
<given-names><![CDATA[VA]]></given-names>
</name>
<name>
<surname><![CDATA[Estrella]]></surname>
<given-names><![CDATA[HQ]]></given-names>
</name>
<name>
<surname><![CDATA[Ruiz]]></surname>
<given-names><![CDATA[AF]]></given-names>
</name>
<name>
<surname><![CDATA[Sagarnaga]]></surname>
<given-names><![CDATA[MV]]></given-names>
</name>
<name>
<surname><![CDATA[Salas]]></surname>
<given-names><![CDATA[JMG]]></given-names>
</name>
<name>
<surname><![CDATA[González]]></surname>
<given-names><![CDATA[MA]]></given-names>
</name>
<name>
<surname><![CDATA[Juárez]]></surname>
<given-names><![CDATA[AZ]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[La cadena productiva de bovinos lecheros y el TLCAN]]></article-title>
<person-group person-group-type="editor">
<name>
<surname><![CDATA[Avila]]></surname>
<given-names><![CDATA[DJA]]></given-names>
</name>
</person-group>
<source><![CDATA[Presente y futuro de los sectores ganadero, forestal y de la pesca mexicanos en el contexto del TLCAN]]></source>
<year>2008</year>
<publisher-loc><![CDATA[México ]]></publisher-loc>
<publisher-name><![CDATA[El Colegio de México, Centro de Estudios Económicos Universidad Autónoma Chapingo]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B26">
<nlm-citation citation-type="journal">
<article-title xml:lang=""><![CDATA[A model of enteric fermentation in dairy cows to estimate methane emission for the Dutch National Inventory Report using the IPCC Tier 3 approach]]></article-title>
<person-group person-group-type="author">
<name>
<surname><![CDATA[Bannink]]></surname>
<given-names><![CDATA[A]]></given-names>
</name>
<name>
<surname><![CDATA[van Schijndel]]></surname>
<given-names><![CDATA[MW]]></given-names>
</name>
<name>
<surname><![CDATA[Dijkstra]]></surname>
<given-names><![CDATA[J]]></given-names>
</name>
</person-group>
<source><![CDATA[Anim Feed Sci Technol]]></source>
<year>2011</year>
<numero>166-167</numero>
<issue>166-167</issue>
<page-range>603-18</page-range></nlm-citation>
</ref>
<ref id="B27">
<nlm-citation citation-type="journal">
<article-title xml:lang=""><![CDATA[Performance, digestion, nitrogen balance, and emission of manure ammonia, enteric methane, and carbon dioxide in lactating cows fed diets with varying alfalfa silage- to-corn silage ratios]]></article-title>
<person-group person-group-type="author">
<name>
<surname><![CDATA[Arndt]]></surname>
<given-names><![CDATA[C]]></given-names>
</name>
<name>
<surname><![CDATA[Powell]]></surname>
<given-names><![CDATA[JM]]></given-names>
</name>
<name>
<surname><![CDATA[Aguerre]]></surname>
<given-names><![CDATA[MJ]]></given-names>
</name>
<name>
<surname><![CDATA[Wattiaux]]></surname>
<given-names><![CDATA[MA]]></given-names>
</name>
</person-group>
<source><![CDATA[J Dairy Sci]]></source>
<year>2015</year>
<volume>98</volume>
<numero>1</numero>
<issue>1</issue>
<page-range>418-30</page-range></nlm-citation>
</ref>
<ref id="B28">
<nlm-citation citation-type="book">
<collab>EPA. United States Environmental Protection Agency</collab>
<source><![CDATA[Inventory of U.S. greenhouse gas emissions and sinks: 1990-2012]]></source>
<year>2014</year>
<publisher-loc><![CDATA[Washington DC, USA ]]></publisher-loc>
<publisher-name><![CDATA[United States Environmental Protection Agency]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B29">
<nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Smink]]></surname>
<given-names><![CDATA[W]]></given-names>
</name>
<name>
<surname><![CDATA[Pellikaan]]></surname>
<given-names><![CDATA[WF]]></given-names>
</name>
<name>
<surname><![CDATA[van der Kolk]]></surname>
<given-names><![CDATA[LJ]]></given-names>
</name>
<name>
<surname><![CDATA[van der Hoek]]></surname>
<given-names><![CDATA[KW]]></given-names>
</name>
</person-group>
<source><![CDATA[Methane production as a result from rumen fermentation in cattle calculated by using the IPCC-GPG Tier 2 method]]></source>
<year>2004</year>
<publisher-loc><![CDATA[Utrecht, The Netherlands ]]></publisher-loc>
<publisher-name><![CDATA[National Institute for Public Health and the Environment]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B30">
<nlm-citation citation-type="journal">
<article-title xml:lang=""><![CDATA[Modeling methane emissions and methane inventories for cattle production systems in Mexico]]></article-title>
<person-group person-group-type="author">
<name>
<surname><![CDATA[Castelán-Ortega]]></surname>
<given-names><![CDATA[OA]]></given-names>
</name>
</person-group>
<source><![CDATA[Atmósfera]]></source>
<year>2014</year>
<volume>27</volume>
<numero>2</numero>
<issue>2</issue>
<page-range>185-91</page-range></nlm-citation>
</ref>
<ref id="B31">
<nlm-citation citation-type="journal">
<article-title xml:lang=""><![CDATA[A new approach to the mathematical formulation of lactation curves]]></article-title>
<person-group person-group-type="author">
<name>
<surname><![CDATA[Morant]]></surname>
<given-names><![CDATA[SV]]></given-names>
</name>
<name>
<surname><![CDATA[Gnanasakthy]]></surname>
<given-names><![CDATA[A]]></given-names>
</name>
</person-group>
<source><![CDATA[Anim Prod]]></source>
<year>1989</year>
<volume>49</volume>
<numero>2</numero>
<issue>2</issue>
<page-range>151-62</page-range></nlm-citation>
</ref>
<ref id="B32">
<nlm-citation citation-type="journal">
<article-title xml:lang=""><![CDATA[Nutrition and reproductive performance of dairy cattle 1 The effect of level of feeding in late pregnancy and around the time of insemination on the reproductive performance of first lactation dairy heifers]]></article-title>
<person-group person-group-type="author">
<name>
<surname><![CDATA[Ducker]]></surname>
<given-names><![CDATA[MJ]]></given-names>
</name>
<name>
<surname><![CDATA[Haggett]]></surname>
<given-names><![CDATA[RA]]></given-names>
</name>
<name>
<surname><![CDATA[Fisher]]></surname>
<given-names><![CDATA[WJ]]></given-names>
</name>
<name>
<surname><![CDATA[Morant]]></surname>
<given-names><![CDATA[SV]]></given-names>
</name>
<name>
<surname><![CDATA[Bloomeld]]></surname>
<given-names><![CDATA[GA]]></given-names>
</name>
</person-group>
<source><![CDATA[Anim Prod]]></source>
<year>1985</year>
<volume>41</volume>
<numero>1</numero>
<issue>1</issue>
<page-range>1-12</page-range></nlm-citation>
</ref>
<ref id="B33">
<nlm-citation citation-type="journal">
<article-title xml:lang=""><![CDATA[GHG historical contribution by sectors, sustainable development and equity]]></article-title>
<person-group person-group-type="author">
<name>
<surname><![CDATA[Muylaert de Araujo]]></surname>
<given-names><![CDATA[MS]]></given-names>
</name>
<name>
<surname><![CDATA[Pires de Campos]]></surname>
<given-names><![CDATA[C]]></given-names>
</name>
<name>
<surname><![CDATA[Pinguelli]]></surname>
<given-names><![CDATA[LR]]></given-names>
</name>
</person-group>
<source><![CDATA[Ren Sust Energy Rev]]></source>
<year>2007</year>
<volume>11</volume>
<numero>5</numero>
<issue>5</issue>
<page-range>988-97</page-range></nlm-citation>
</ref>
</ref-list>
</back>
</article>
