<?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>0187-7380</journal-id>
<journal-title><![CDATA[Revista fitotecnia mexicana]]></journal-title>
<abbrev-journal-title><![CDATA[Rev. fitotec. mex]]></abbrev-journal-title>
<issn>0187-7380</issn>
<publisher>
<publisher-name><![CDATA[Sociedad Mexicana de Fitogenética A.C.]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S0187-73802019000200129</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[CONCENTRACIÓN NUTRIMENTAL DE BIOCARBÓN DE CASCARILLA DE ARROZ]]></article-title>
<article-title xml:lang="en"><![CDATA[NUTRIENT CONCENTRATION OF RICE HUSK BIOCHAR]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Velázquez-Maldonado]]></surname>
<given-names><![CDATA[Jazmín]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Juárez-López]]></surname>
<given-names><![CDATA[Porfirio]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Anzaldo-Hernández]]></surname>
<given-names><![CDATA[José]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Alejo-Santiago]]></surname>
<given-names><![CDATA[Gelacio]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Valdez-Aguilar]]></surname>
<given-names><![CDATA[Luis Alonso]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Alia-Tejacal]]></surname>
<given-names><![CDATA[Irán]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[López-Martínez]]></surname>
<given-names><![CDATA[Víctor]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Pérez-Arias]]></surname>
<given-names><![CDATA[G. Alicia]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Guillén-Sánchez]]></surname>
<given-names><![CDATA[Dagoberto]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Universidad Autónoma del Estado de Morelos Facultad de Ciencias Agropecuarias ]]></institution>
<addr-line><![CDATA[Cuernavaca Morelos]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Universidad de Guadalajara Centro Universitario de Ciencias Exactas e Ingenierías ]]></institution>
<addr-line><![CDATA[Guadalajara Jalisco]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af3">
<institution><![CDATA[,Universidad Autónoma de Nayarit Unidad Académica de Agricultura ]]></institution>
<addr-line><![CDATA[Xalisco Nayarit]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af4">
<institution><![CDATA[,Universidad Autónoma Agraria Antonio Narro Departamento de Horticultura ]]></institution>
<addr-line><![CDATA[Saltillo Coahuila]]></addr-line>
<country>Mexico</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>06</month>
<year>2019</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>06</month>
<year>2019</year>
</pub-date>
<volume>42</volume>
<numero>2</numero>
<fpage>129</fpage>
<lpage>136</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S0187-73802019000200129&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S0187-73802019000200129&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S0187-73802019000200129&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[RESUMEN El biocarbón es un material sólido poroso que se produce por la conversión termoquímica de materiales orgánicos en un ambiente limitado o en ausencia de oxígeno; tiene propiedades físico-químicas aptas para el almacenamiento a largo plazo de carbono y, potencialmente, mejora la fertilidad de los suelos. El objetivo del presente estudio fue evaluar la concentración nutrimental en biocarbón elaborado con cascarilla de arroz (Oryza sativa L.) y adicionado con ácido cítrico, maleico y propiónico al 5 y 10 % como catalizadores. El biocarbón se elaboró con la técnica de carbonización hidrotérmica a 200 ºC durante 19 h. Se determinó el rendimiento de biocarbón, concentración de materia orgánica y de N, P, K, Ca, Mg, Cu, Fe, Mn, Zn, Si y Na. Los mayores rendimientos de biocarbón (66 %) se obtuvieron cuando se añadieron los ácidos maleico y cítrico al 10 %. El mayor contenido de materia orgánica (71 %) se obtuvo con ácido maleico al 5 %. En general, los tres macronutrimentos con mayor concentración (mg kg-1) fueron Ca (4386-10,988), N (3067-4467) y K (327-3530), mientras que los micronutrimentos con mayor concentración (mg kg-1) fueron Fe (77.1-238.3) y Mn (75.4-281.4), así como el elemento benéfico Na (92.8-160.0). Por sus características de rendimiento, concentraciones de materia orgánica y nutrimental, el biocarbón de cascarilla de arroz potencialmente se podría usar como mejorador de suelos agrícolas.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[SUMMARY Biochar is a porous, solid material that is produced by the thermochemical conversion of organic materials under a limited or oxygen-free environment; it has physical and chemical properties suitable for the long-term storage of carbon, and potentially, improves the fertility of soils. The objective of this study was to evaluate the nutrient concentration of biochar prepared with rice (Oryza sativa L.) husk and added with citric, maleic and propionic acids at 5 and 10% as catalysts. The biochar was prepared through the hydrothermal carbonization technique at 200 ºC for 19 h. The yield of biochar and concentration of organic matter, N, P, K, Ca, Mg, Cu, Fe, Mn, Zn, Si and Na were determined. The highest yields of biochar (66%) were obtained when 10 % maleic and citric acids were added. The highest content of organic matter (71%) was obtained with 5 % maleic acid. In general, the three macronutrients with the highest concentration (mg kg-1) were Ca (4386-10,988), N (3067-4467) and K (327-3530), while the micronutrients with the highest concentration (mg kg-1) were Fe (77.1-238.3) and Mn (75.4-281.4), as well as the beneficial element Na (92.8-160.0). Due to its yield, organic matter and nutrient concentrations, the rice husk biochar could be used, potentially, as an improver of agricultural soils.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[Oryza sativa]]></kwd>
<kwd lng="es"><![CDATA[carbonización hidrotérmica]]></kwd>
<kwd lng="es"><![CDATA[biomasa]]></kwd>
<kwd lng="es"><![CDATA[macronutrimentos]]></kwd>
<kwd lng="es"><![CDATA[micronutrimentos]]></kwd>
<kwd lng="en"><![CDATA[Oryza sativa]]></kwd>
<kwd lng="en"><![CDATA[hydrothermal carbonization]]></kwd>
<kwd lng="en"><![CDATA[biomass]]></kwd>
<kwd lng="en"><![CDATA[macronutrients]]></kwd>
<kwd lng="en"><![CDATA[micronutrients]]></kwd>
</kwd-group>
</article-meta>
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