Contrasting effects of phosphorus and potassium deficiencies on leaf area development in maize

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Management of P and K in agricultural systems is similar, since both move mainly by diffusion in soil. In maize (Zea mays L.), radiation capture is a consequence primarily of leaf area formation and senescence, but little is known about P and K interaction in determining both variables. The objectiv...

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Detalles Bibliográficos
Autor principal: Arias Usandivaras, Luis María
Otros Autores: Gutiérrez Boem, Flavio Hernán, Salvagiotti, Fernando
Formato: Artículo
Lenguaje:Inglés
Materias:
CORN
HYBRIDS
KERNEL WEIGHT
Acceso en línea:http://ri.agro.uba.ar/files/intranet/articulo/2018usandivaras.pdf
LINK AL EDITOR
Aporte de:Registro referencial: Solicitar el recurso aquí
Biblioteca Central (FAUBA) de Universidad de Buenos Aires
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024 |a 10.2135/cropsci2018.02.0092 
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100 1 |9 22765  |a Arias Usandivaras, Luis María  |u Lares SRL, Pergamino, Argentina. 
245 0 0 |a Contrasting effects of phosphorus and potassium deficiencies on leaf area development in maize 
520 |a Management of P and K in agricultural systems is similar, since both move mainly by diffusion in soil. In maize (Zea mays L.), radiation capture is a consequence primarily of leaf area formation and senescence, but little is known about P and K interaction in determining both variables. The objective of this study was to assess the effects of P, K, and P K interaction on (i) leaf appearance rate and final leaf number, (ii) individual leaf area, (iii) leaf senescence rate, and (iv) leaf area development in maize. Two field experiments were performed in the 2011 – 2012 and 2012 – 2013 growing seasons, under no water and N limitations. Treatments consisted of different levels of P and K fertilization. Differential effects of both nutrients occurred for leaf area formation and senescence. Phosphorus deficiencies decreased average leaf appearance rate by 10 per cent and individual leaf area by 18per cent, whereas K deficiency reduction of individual leaf area was 14per cent. Final leaf number did not change under both P and K deficiency. Phosphorus deficiencies decreased leaf senescence rate by 2 per cent, whereas K deficiencies accelerated this process by 12 per cent. As the result of the counteracting processes of expansion and senescence, P deficiency effects on green leaf area index were larger at the beginning of the crop cycle and tended to attenuate after, whereas K deficiencies were more important in later stages. These results may help in modeling the effects of P and K shortage in maize. 
653 |a CORN 
653 |a HYBRIDS 
653 |a KERNEL WEIGHT 
700 1 |9 6387  |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. 
700 1 |9 40308  |a Salvagiotti, Fernando  |u Instituto Nacional de Tecnología Agropecuaria (INTA). Centro Regional Santa Fe. Estación Experimental Agropecuaria Oliveros (EEA Oliveros). Departamento de Agronomía. Santa Fe, Argentina. 
773 0 |t Crop science  |w SECS000064  |g vol.58, no.5 (2018) p.2099-2109, grafs., tbls. 
856 |f 2018usandivaras  |i en Intranet  |q application/pdf  |u http://ri.agro.uba.ar/files/intranet/articulo/2018usandivaras.pdf  |x ARTI201908 
856 |u https://www.crops.org  |z LINK AL EDITOR 
942 |c ARTICULO 
942 |c ENLINEA 
976 |a AAG 

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