<?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>0187-5779</journal-id>
<journal-title><![CDATA[Terra Latinoamericana]]></journal-title>
<abbrev-journal-title><![CDATA[Terra Latinoam]]></abbrev-journal-title>
<issn>0187-5779</issn>
<publisher>
<publisher-name><![CDATA[Sociedad Mexicana de la Ciencia del Suelo A.C.]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S0187-57792025000100402</article-id>
<article-id pub-id-type="doi">10.28940/terra.v43i.2056</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Rendimiento de Lechuga (Lactuca sativa L.) Bajo Diferentes Láminas de Riego y Dosis de Nitrógeno en el Valle Imperial, California]]></article-title>
<article-title xml:lang="en"><![CDATA[Lettuce Yield (Lactuca sativa L.) Under Different Irrigation Regimes and Nitrogen Dose in the Imperial Valley, California]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Buenrostro-Curiel]]></surname>
<given-names><![CDATA[Juan]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Montazar]]></surname>
<given-names><![CDATA[Aliasghar]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Avilés-Marín]]></surname>
<given-names><![CDATA[Silvia Mónica]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Escobosa-García]]></surname>
<given-names><![CDATA[María Isabel]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Brígido-Morales]]></surname>
<given-names><![CDATA[Juan Gabriel]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Soto-Ortiz]]></surname>
<given-names><![CDATA[Roberto]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Universidad Autónoma de Baja California Instituto de Ciencias Agrícolas ]]></institution>
<addr-line><![CDATA[Mexicali Baja California]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,University of California operative Extension Center Imperial County ]]></institution>
<addr-line><![CDATA[Holtville CA]]></addr-line>
<country>USA</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>12</month>
<year>2025</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>12</month>
<year>2025</year>
</pub-date>
<volume>43</volume>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S0187-57792025000100402&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S0187-57792025000100402&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S0187-57792025000100402&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen: La lechuga es una de las hortalizas de mayor consumo en el mundo. China es el país con mayor producción de este cultivo, seguido de Estados Unidos de América el cual produce 3.3 millones de Mg año-1 con el 90% ubicado en el suroeste principalmente en los estados de California y Arizona. Diversos estudios muestran que la dosis de aplicación de 363 a 470 kg ha-1 de fertilizantes nitrogenados permite obtener los mayores rendimientos en el cultivo de lechuga de consumo de hoja suelta y &#8220;iceberg&#8221;, sin embargo, de esta dosis, el cultivo sólo absorbe el 40% del nitrógeno, mientras que el resto se pierde por el proceso de lixiviación. Aunado a esta situación el uso indiscriminado de láminas de riego con rangos de aplicación que varían en función del clima desde 0.45 m·ha-1 en Colombia, hasta 2.0 m ha-1 en el estado de California. Estos dos factores promueven la contaminación de mantos acuíferos e incrementa los costos de producción. El objetivo de este trabajo consistió en evaluar en términos de rendimiento dos distintas láminas de riego y tres niveles de fertilización nitrogenada, bajo un diseño de parcelas divididas distribuidos en bloques completos al azar con cuatro repeticiones. Las variables analizadas fueron el índice NDVI, contenido de clorofila, conductancia estomática, concentración de nitratos en savia, rendimiento y peso seco de biomasa de lechuga. Los resultados muestran que no existen diferencias estadísticas en el rendimiento en función de las diferentes láminas de riego y dosis de fertilización nitrogenada, por lo cual, es posible proponer un cambio en el paquete tecnológico actual de este cultivo, permitiendo aplicar el tratamiento con menor lámina de riego (0.62 m ha-1) y menor fertilización (94 kg ha-1).]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Summary: Lettuce is one of the most widely consumed vegetables globally. China is the leading producer of this crop, followed by the United States, which produces 3.3 million tons per year, with 90% of production concentrated in the south-western region, primarily in the states of California and Arizona. Various studies indicate that nitrogen fertilizer application rates between 363 and 470 kg ha-¹ achieve the highest yields in loose-leaf and &#8216;iceberg&#8217; lettuce cultivation. However, of this application rate, only 40% of the nitrogen is absorbed by the crop, while the remainder is lost through leaching processes. This issue is compounded by the indiscriminate use of irrigation rates, which vary according to climatic conditions, ranging from 0.45 m ha-¹ in Colombia to 2.0 m ha-¹ in California. These two factors contribute to groundwater contamination and increase production costs. The objective of this study was to evaluate, in terms of yield, two different irrigation rates and three nitrogen fertilization levels using a split-plot design arranged in a randomized complete block with four replicates. The variables analysed included NDVI index, chlorophyll content, stomatal conductance, sap nitrate concentration, yield, and dry biomass weight of lettuce. The results show no statistically significant differences in yield based on the different irrigation rates and nitrogen fertilization levels, suggesting that a change in the current technological package for this crop is feasible, allowing for the application of the treatment with the lowest irrigation rate (0.62 m ha-¹) and lower fertilization (94 kg ha-¹).]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[estrés hídrico]]></kwd>
<kwd lng="es"><![CDATA[fertilización nitrogenada]]></kwd>
<kwd lng="es"><![CDATA[uso eficiente del nitrógeno]]></kwd>
<kwd lng="en"><![CDATA[water stress]]></kwd>
<kwd lng="en"><![CDATA[nitrogen fertilization]]></kwd>
<kwd lng="en"><![CDATA[nitrogen use efficiency]]></kwd>
</kwd-group>
</article-meta>
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