<?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>1027-152X</journal-id>
<journal-title><![CDATA[Revista Chapingo. Serie horticultura]]></journal-title>
<abbrev-journal-title><![CDATA[Rev. Chapingo Ser.Hortic]]></abbrev-journal-title>
<issn>1027-152X</issn>
<publisher>
<publisher-name><![CDATA[Universidad Autónoma Chapingo]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S1027-152X2022000300189</article-id>
<article-id pub-id-type="doi">10.5154/r.rchsh.2021.09.018</article-id>
<title-group>
<article-title xml:lang="en"><![CDATA[Relationship between chlorophyll and nitrogen concentration, and fresh matter production in basil &#8216;Nufar&#8217; (Ocimum basilicum) with three handheld chlorophyll meter readings: SPAD, atLEAF and MC-100]]></article-title>
<article-title xml:lang="es"><![CDATA[Relación entre concentraciones de clorofila y nitrógeno, y producción de materia fresca en albahaca &#8216;Nufar&#8217; (Ocimum basilicum), con lecturas de tres medidores manuales de clorofila: SPAD, atLEAF y MC-100]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Ontiveros-Capurata]]></surname>
<given-names><![CDATA[Ronald Ernesto]]></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[Mendoza-Tafolla]]></surname>
<given-names><![CDATA[Rodrigo Omar]]></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[Villegas-Torres]]></surname>
<given-names><![CDATA[Oscar Gabriel]]></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 contrib-type="author">
<name>
<surname><![CDATA[Cartmill]]></surname>
<given-names><![CDATA[Andrew D.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Instituto Mexicano de Tecnología del Agua  ]]></institution>
<addr-line><![CDATA[Jiutepec Morelos]]></addr-line>
<country>México</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Universidad Autónoma del Estado de Morelos  ]]></institution>
<addr-line><![CDATA[Cuernavaca Morelos]]></addr-line>
<country>México</country>
</aff>
<aff id="Af3">
<institution><![CDATA[,University of Wisconsin-Platteville  ]]></institution>
<addr-line><![CDATA[Platteville Wisconsin]]></addr-line>
<country>United States of America</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>12</month>
<year>2022</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>12</month>
<year>2022</year>
</pub-date>
<volume>28</volume>
<numero>3</numero>
<fpage>189</fpage>
<lpage>202</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S1027-152X2022000300189&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S1027-152X2022000300189&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S1027-152X2022000300189&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract Determinations of nitrogen (N) and chlorophyll (Chl) by destructive methods are precise but time-consuming and frequently expensive. The objective of this study was to determine the relationship between SPAD, atLEAF, and MC-100 readings with the concentrations of Chl, N, and fresh matter (FM) in basil &#8216;Nufar&#8217;. In addition, we determined the relationship of the N concentration with fresh matter (FM). The plants were irrigated with five levels of N (0, 4, 8, 12, and 16 mEq·L-1 of NO3) based on a modified Steiner solution for 42 days after transplant. Plants were evaluated weekly with SPAD, atLEAF and MC-100 portable chlorophyll meters in the greenhouse, while FM and the concentration of Chl and N were determined in the laboratory using conventional techniques. The relationship between SPAD readings, Chl, N, and FM was strong, positive, linear, and significant, with correlation coefficients (R2) between 0.94 and 0.98. For atLEAF and MC-100 readings, R2 values were 0.96 to 0.99 and 0.96 to 0.99, respectively. The relationships between SPAD, atLEAF and MC-100 readings were strong, positive, and significant, with R2 values of 0.98. Similar behavior was shown by the relationship of N concentration and FM with R2 of 0.88. With these results, we conclude that SPAD, atLEAF, and MC-100 can be used to estimate the nutrient status of N in a non-destructive, rapid and reliable manner during basil production.]]></p></abstract>
<abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen Las determinaciones de nitrógeno (N) y clorofila (Chl) por métodos destructivos son precisas, pero demandantes en tiempo y frecuentemente costosas. El objetivo de este estudio fue determinar la relación entre las lecturas SPAD, atLEAF y MC-100, y las concentraciones de Chl, N y materia fresca (MF) en albahaca &#8216;Nufar&#8217;. Las plantas se irrigaron con cinco niveles de N (0, 4, 8, 12 y 16 mEq·L-1 de NO3), basados en una solución de Steiner modificada, durante 42 días después del trasplante. Las plantas se evaluaron semanalmente en el invernadero con los medidores portátiles de clorofila SPAD, atLEAF y MC-100. La MF, la Chl y el N se determinaron en laboratorio mediante técnicas convencionales. La relación entre las lecturas SPAD, la Chl, el N y la MF fue lineal, positiva y significativa, con coeficientes de determinación (R2) entre 0.94 y 0.98. Para las lecturas atLAEF y MC-100, los valores de R2 fueron 0.96 a 0.99 y 0.96 a 0.99, respectivamente. Las relaciones entre las lecturas SPAD, atLEAF y MC-100 resultaron positivas y significativas, con valores de R2 de 0.98. Un comportamiento similar se presentó en la relación de concentración de N y MF, con R2 de 0.88. Con base en estos resultados, se concluye que los medidores SPAD, atLEAF y MC-100 se pueden utilizar para estimar los estatus de N de forma no destructiva, rápida y confiable durante la producción de albahaca.]]></p></abstract>
<kwd-group>
<kwd lng="en"><![CDATA[non-destructive analysis]]></kwd>
<kwd lng="en"><![CDATA[aromatic plant, soilless culture]]></kwd>
<kwd lng="es"><![CDATA[análisis no destructivo]]></kwd>
<kwd lng="es"><![CDATA[plantas aromáticas]]></kwd>
<kwd lng="es"><![CDATA[cultivo sin suelo]]></kwd>
</kwd-group>
</article-meta>
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