<?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>2007-0934</journal-id>
<journal-title><![CDATA[Revista mexicana de ciencias agrícolas]]></journal-title>
<abbrev-journal-title><![CDATA[Rev. Mex. Cienc. Agríc]]></abbrev-journal-title>
<issn>2007-0934</issn>
<publisher>
<publisher-name><![CDATA[Instituto Nacional de Investigaciones Forestales, Agrícolas y Pecuarias]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S2007-09342016000501155</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Efecto de la dosis de N en la incidencia de Fusarium spp. en raíces de trigo bajo camas permanentes]]></article-title>
<article-title xml:lang="en"><![CDATA[Effect of the dose of N in the incidence of Fusarium spp. in wheat roots under permanent beds]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Limón Ortega]]></surname>
<given-names><![CDATA[Agustin]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Pelaez Cruz]]></surname>
<given-names><![CDATA[Deyxi]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Leyva Mir]]></surname>
<given-names><![CDATA[Gerardo]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Espinosa Barreto]]></surname>
<given-names><![CDATA[Catalina]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,INIFAP  ]]></institution>
<addr-line><![CDATA[ Estado de México]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Universidad Autonoma Chapingo  ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>Mexico</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>08</month>
<year>2016</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>08</month>
<year>2016</year>
</pub-date>
<volume>7</volume>
<numero>5</numero>
<fpage>1155</fpage>
<lpage>1165</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S2007-09342016000501155&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S2007-09342016000501155&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S2007-09342016000501155&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen La aplicación de sistemas de labranza de conservación como el de camas permanentes tiene ventajas importantes sobre la producción de cultivos. Sin embargo, los residuos de cultivo que se dejan sobre el suelo promueven el desarrollo de enfermedades. En este estudio se evaluó la incidencia de hongos en la raíz de trigo con cuatro dosis de N (0, 20, 40 y 60 kg ha-1) en rotación con maíz en tres dosis de N (0, 60 y 120 kg ha-1) bajo camas permanentes. La identificación se realizó por observación microscópica directa encontrándose siete especies de Fusarium y tres de Helminthosporium. La incidencia de la mayoría de estas se afectó por la aplicación de N. La incidencia de Fusarium moniliforme se relacionó negativamente con rendimiento, espigas por m2 y absorción total de N. La tasa de reducción (pendiente) de cada uno de estos parámetros y su efecto a baja incidencia (intercepto) dependió de la dosis de N. El efecto de la incidencia en estos parámetros fue menor para la aplicación de 40 kg N ha-1 que para 60 kg N ha-1. El resto de las especies identificadas no presentaron un patrón definido. Por otra parte, el índice diferencial normalizado de vegetación (NDVI) colectado en tratamientos con la aplicación de 60 kg N ha-1 en tres etapas de desarrollo presentó una asociación negativa con la incidencia de Fusarium moniliforme. Estos resultados indican la importancia de la aplicación adecuada de N para reducir el efecto de la incidencia en plantas. Las lecturas NDVI demostraron ser una herramienta potencial para la detección indirecta de enfermedades en la raíz.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract The application of conservation tillage systems like permanent beds has important advantages over the production of crops. However, crop residues are left on the ground promote disease development. In this study the incidence of fungi in the root of wheat was evaluated with four doses of N (0, 20, 40 and 60 kg ha-1) in rotation with maize in three doses of N (0, 60 and 120 kg ha-1) under permanent beds. The identification was made by direct microscopic observation was found seven species of Fusarium and Helminthosporium three. The incidence of most of these were affected by the application of N. The incidence of Fusarium moniliforme was negatively related to performance spikes per m2 and total absorption of N. The reduction rate (slope) of each of these parameters and their effect low incidence (intercept) dose dependent N. The effect of these parameters on the incidence was lower for the application of 40 kg N ha-1 to 60 kg N ha1. The rest of the identified species did not show a definite pattern. Moreover, the differential normalized vegetation index (NDVI) collected in treatments with the application of 60 kg N ha-1 in three stages of development presented a negative association with the incidence of Fusarium moniliforme. These results indicate the importance of proper application of N to reduce the effect of impact on plants. The NDVI readings proved to be a potential tool for indirect detection of disease at the root.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[camas permanentes]]></kwd>
<kwd lng="es"><![CDATA[enfermedades de la raíz]]></kwd>
<kwd lng="es"><![CDATA[nitrógeno]]></kwd>
<kwd lng="es"><![CDATA[NDVI]]></kwd>
<kwd lng="es"><![CDATA[trigo]]></kwd>
<kwd lng="en"><![CDATA[nitrogen]]></kwd>
<kwd lng="en"><![CDATA[NDVI]]></kwd>
<kwd lng="en"><![CDATA[permanent beds]]></kwd>
<kwd lng="en"><![CDATA[root diseases]]></kwd>
<kwd lng="en"><![CDATA[wheat]]></kwd>
</kwd-group>
</article-meta>
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