Is the lack of response of maize to fertilization in soils with low Bray 1 - P related to labile organic phosphorus?

The usual soil test phosphorus (P) neglects the P supply from labile organic P (Po) fractions, which could explain the nonresponse of maize (Zea mays L.) in sites with soil P testing below the critical level. We aim to determine Po and inorganic P (Pi) in NaHCO3 extracts and in the coarse soil fract...

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Detalles Bibliográficos
Otros Autores: Appelhans, Stefania Carolina, Barbagelata, Pedro A., Melchiori, Ricardo José Miguel, Gutiérrez Boem, Flavio Hernán, Caviglia, Octavio Pedro
Formato: Artículo
Lenguaje:Inglés
Materias:
RELATIVE YIELD
LABILE P
FERTILIZER RECOMMENDATION
Acceso en línea:http://ri.agro.uba.ar/files/intranet/articulo/2022appelhansstefaniacarolina1.pdf
LINK AL EDITOR
Aporte de:Registro referencial: Solicitar el recurso aquí
Biblioteca Central (FAUBA) de Universidad de Buenos Aires
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245 1 0 |a Is the lack of response of maize to fertilization in soils with low Bray 1 - P related to labile organic phosphorus? 
520 |a The usual soil test phosphorus (P) neglects the P supply from labile organic P (Po) fractions, which could explain the nonresponse of maize (Zea mays L.) in sites with soil P testing below the critical level. We aim to determine Po and inorganic P (Pi) in NaHCO3 extracts and in the coarse soil fraction (hereinafter, CF) from responsive and nonresponsive sites to P fertilization in maize. We then compare the classification errors of the Cate and Nelson method by comparing the relationship between maize relative yield and the soil Bray1-P concentration vs. the new proposed indices. The study included responsive and nonresponsive sites to P fertilization carried out across the Pampas Region in the center-east of Argentina. Treatments included four P fertilization rates: 0, 12, 24, and 36 kg P ha−1. The experiments were laid out in a randomized complete block design with three replicates. We determined Bray1-P, Pi, and Po in NaHCO3 extracts and in the coarse soil fraction. Sites non-responsive to P fertilization and with Bray1-P concentrations below the critical level showed 70% more Po in the coarse soil fraction (Po-CF) than sites with high crop response and similar Bray1-P level. However, Po-Bic alone did not improve the relationship with maize relative yield. Po-CF and Bray1-P included in a soil integrative P index improved the prediction of crop response to P fertilization and reduced classification errors, which suggests that Po-CF is a source of available P for the crops. The novelty reported in this study was to demonstrate the organic P contribution to relative yield by including it into an integrative soil testing. We find that nonresponsive sites to P fertilization, with low Bray1-P, were correctly classified when including Po-CF in a new soil test P. Improvements in the P fertilization diagnostic prescription tool contribute to an increase in economic profit and reduce environmental impact. 
650 |2 Agrovoc  |9 26 
653 |a RELATIVE YIELD 
653 |a LABILE P 
653 |a FERTILIZER RECOMMENDATION 
700 1 |a Appelhans, Stefania Carolina  |u CONICET. Buenos Aires, Argentina.  |u Universidad Nacional de Entre Ríos. Facultad de Ciencias Agropecuarias. Paraná, Entre Ríos, Argentina.  |u Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Paraná (EEA Paraná). Paraná, Entre Ríos. Argentina.  |9 72287 
700 1 |a Barbagelata, Pedro A.  |u Universidad Nacional de Entre Ríos. Facultad de Ciencias Agropecuarias. Paraná, Entre Ríos, Argentina.  |u Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Paraná (EEA Paraná). Paraná, Entre Ríos. Argentina.  |9 41661 
700 1 |a Melchiori, Ricardo José Miguel  |u Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Paraná (EEA Paraná). Paraná, Entre Ríos. Argentina.  |9 50590 
700 1 |a Gutiérrez Boem, Flavio Hernán  |u Universidad de Buenos Aires. Facultad de Agronomía. Instituto de Investigaciones en Biociencias Agrícolas y Ambientales (INBA). Buenos Aires, Argentina.  |u CONICET – Universidad de Buenos Aires. Instituto de Investigaciones en Biociencias Agrícolas y Ambientales (INBA). Buenos Aires, Argentina.  |u Universidad de Buenos Aires. Facultad de Agronomía. Departamento de Ingeniería Agrícola y Uso de la Tierra. Cátedra de Fertilidad y Fertilizantes. Buenos Aires, Argentina.  |9 6387 
700 1 |a Caviglia, Octavio Pedro  |u CONICET. Buenos Aires, Argentina.  |u Universidad Nacional de Entre Ríos. Facultad de Ciencias Agropecuarias. Paraná, Entre Ríos, Argentina.  |9 50592 
773 |t Journal of Soil Science and Plant Nutrition  |g Vol.21, no.1 (2021), p.612–621, tbls., grafs. 
856 |f 2022appelhansstefaniacarolina1  |i En reservorio  |q application/pdf  |u http://ri.agro.uba.ar/files/intranet/articulo/2022appelhansstefaniacarolina1.pdf  |x ARTI202209 
856 |u http://www.springer.com/  |z LINK AL EDITOR 
942 |c ARTICULO 
942 |c ENLINEA 
976 |a AAG 

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