<?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>0377-9424</journal-id>
<journal-title><![CDATA[Agronomía Costarricense]]></journal-title>
<abbrev-journal-title><![CDATA[Agron. Costarricense]]></abbrev-journal-title>
<issn>0377-9424</issn>
<publisher>
<publisher-name><![CDATA[Universidad de Costa Rica. Colegio de Ingenieros y Agrónomos. Ministerio de Agricultura y Ganadería]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S0377-94242024000100093</article-id>
<article-id pub-id-type="doi">10.15517/rac.v48i1.59136</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Incremento de la fijación biológica de nitrógeno y el crecimiento de la soya (Glycine max) mediante el uso de hongos solubilizadores de fósforo]]></article-title>
<article-title xml:lang="en"><![CDATA[Increase the biological nitrogen fixation and the growth of soybean (Glycine max) using phosphorus-solubilizing fungi]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Castro-Barquero]]></surname>
<given-names><![CDATA[Leida]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Universidad de Costa Rica, Centro de Investigaciones Agronómicas-Agroalimentarias,  ]]></institution>
<addr-line><![CDATA[ San José]]></addr-line>
<country>Costa Rica</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>06</month>
<year>2024</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>06</month>
<year>2024</year>
</pub-date>
<volume>48</volume>
<numero>1</numero>
<fpage>93</fpage>
<lpage>109</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.sa.cr/scielo.php?script=sci_arttext&amp;pid=S0377-94242024000100093&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.sa.cr/scielo.php?script=sci_abstract&amp;pid=S0377-94242024000100093&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.sa.cr/scielo.php?script=sci_pdf&amp;pid=S0377-94242024000100093&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen Introducción. La soya establece una simbiosis con Bradyrhizobium japonicum para fijar N atmosférico. La coinoculación con otros microorganismos promotores del crecimiento (MPC) puede incrementar la Fijación Biológica de Nitrógeno (FBN) y el crecimiento de las plantas. Objetivo. Determinar si la inoculación con los hongos solubilizadores de P (SP), Aspergillus flavus (S1) y Trichoderma longibrachiatum (S2), afecta variables de crecimiento y de FBN en soya. Materiales y métodos. En un Andisol y un Ultisol en invernadero, se evaluaron variables de crecimiento y FBN en soya inoculada con B. japonicum y 2 SP. Se evaluaron 5 tratamientos: un testigo absoluto (T), adición de roca fosfórica (RF), adición de RF e inoculación con B. japonicum (BRF) y la adición de RF, B. japonicum y los 2 SP de manera independiente (BRFS1 y BRFS2). Se estableció un diseño irrestricto al azar con 4 repeticiones y los datos se analizaron según la normalidad, con ANDEVA y DGC al 5% o Kruskal Wallis al 5%. Resultados. Se obtuvo un efecto positivo sobre las variables evaluadas, cuando la soya se inoculó con los SP además de B. japonicum. El efecto fue tendencia en el Andisol, para las variables peso fresco aéreo y número de nódulos y su peso seco, mientras que para el Ultisol se encontró significancia para estas mismas variables, así como para el peso seco aéreo, área foliar y contenido de N y P foliar, el efecto fue mayor en BRFS2. En términos absolutos el mayor contenido de P en la biomasa microbiana del suelo y la mayor población de SP se encontró en el tratamiento con la presencia de S2. Las poblaciones de Fijadores de N fueron mayores para T y RF. Conclusión. La inoculación con hongos SP puede afectar positivamente la FBN, las cantidades de N y P foliar así como el crecimiento de las plantas de soya.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract Introduction.Soybean establishes a symbiosis with Bradyrhizobium japonicum that allows it to fix atmospheric N. Coinoculation with other plant growth-promoting microorganisms can increase Biological Nitrogen Fixation (BNF) and plant growth. Objective. Determine if inoculation with P-solubilizing fungi (SP), Aspergillus flavus (S1) and Trichoderma longibrachiatum (S2), affects growth and BNF variables in soybeans. Materials and methods. In the greenhouse on an Andisol and an Ultisol, growth variables and BNF were evaluated in soybeans inoculated with B. japonicum and 2 SPs. Five treatments were evaluated: an absolute control (T), addition of phosphate rock (RF), addition of RF and inoculation with B. japonicum (BRF) and the addition of RF, B. japonicum and the 2 SPs independently (BRFS1 and BRFS2). An unrestricted randomized design with 4 repetitions was established and the data was analyzed according to normality, either with ANDEVA and DGC at 5% or Kruskal Wallis at 5%. Results. The responses obtained showed a positive effect on the evaluated variables when soybeans were inoculated with SP in addition with B. japonicum. The effect was a trend in Andisol, for the variables aerial fresh weight and number of nodules and their dry weight, while for Ultisol significance was found for these same variables, as well as for aerial dry weight, leaf area and N content and foliar P, with the greatest effect in BRFS2. In absolute terms, the highest P content in the soil microbial biomass and the highest SP population was found in the treatment with the presence of S2. The populations of N Fixers (NF) in the soil were higher for T and RF that did not have inoculation with B. japonicum. Conclusion. Inoculation with SP fungi can positively affect BNF, foliar N and P amounts as well as soybean plant growth.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[solubilizadores de P]]></kwd>
<kwd lng="es"><![CDATA[Bradyrhizobium]]></kwd>
<kwd lng="es"><![CDATA[sostenibilidad]]></kwd>
<kwd lng="es"><![CDATA[FBN]]></kwd>
<kwd lng="es"><![CDATA[consorcio microbiano]]></kwd>
<kwd lng="es"><![CDATA[sideróforos]]></kwd>
<kwd lng="en"><![CDATA[P solubilizers]]></kwd>
<kwd lng="en"><![CDATA[Bradyrhizobium]]></kwd>
<kwd lng="en"><![CDATA[sustainability]]></kwd>
<kwd lng="en"><![CDATA[BNF]]></kwd>
<kwd lng="en"><![CDATA[microbial consortium]]></kwd>
<kwd lng="en"><![CDATA[siderophores]]></kwd>
</kwd-group>
</article-meta>
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