Contribution of the early - established plant hierarchies to maize crop responses to N fertilization
Maize crop production depends on nitrogen (N) availability, N uptake by the crop and the efficiency with which absorbed N is used to produce biomass (NUEBIOM) or grain yield (NUEGRAIN). This framework assumes unique efficiency values for the whole stand, with no distinction among plants in spite of...
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| Formato: | Artículo |
| Lenguaje: | Inglés |
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| Acceso en línea: | http://ri.agro.uba.ar/files/intranet/articulo/2018rossini.pdf LINK AL EDITOR |
| Aporte de: | Registro referencial: Solicitar el recurso aquí |
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| 003 | AR-BaUFA | ||
| 005 | 20220524102528.0 | ||
| 008 | 180803t2018 ne |||||o|||| 00| | eng d | ||
| 999 | |c 45768 |d 45768 | ||
| 999 | |d 45768 | ||
| 999 | |d 45768 | ||
| 999 | |d 45768 | ||
| 022 | |a 0378-4290 | ||
| 024 | |a 10.1016/j.fcr.2017.11.015 | ||
| 040 | |a AR-BaUFA | ||
| 245 | 1 | 0 | |a Contribution of the early - established plant hierarchies to maize crop responses to N fertilization |
| 520 | |a Maize crop production depends on nitrogen (N) availability, N uptake by the crop and the efficiency with which absorbed N is used to produce biomass (NUEBIOM) or grain yield (NUEGRAIN). This framework assumes unique efficiency values for the whole stand, with no distinction among plants in spite of the inherent inter-plant variability of plant growth, especially under crowding stress. In this work we assessed the degree of contribution of different early - established groups of plants to crop responses to N fertilization of two maize hybrids (H) with different tolerance to crowding stress (high for AX820 and low for AX877) cultivated at two stand densities (9 and 12 pl m−2). Groups corresponded to the lower, mid and upper terciles (Ts) of the crop, representing dominated, intermediate and dominant plants, respectively. In most cases, lower and mid Ts had a greater participation in crop biomass and grain yield responses to N fertilization. The response of NUEBIOM and NUEGRAIN to N fertilization was higher for the lower and mid Ts than for the upper T. For each N level, crop NUEGRAIN was negatively related to inter - plant variability in plant NUEGRAIN. When no N was added, the reduction in crop NUEGRAIN of both hybrids was mainly caused by the increased inter - plant variability in plant N uptake (i.e. resource capture). Additionally, the crowding - intolerant AX877 under the most stressful condition (12 pl m−2 and no added N) had a reduced crop NUEGRAIN due to the enhanced plant-to-plant variability in grain yield (i.e. resource use). Consequently, the early - established plant - to - plant variability pattern conditioned crop NUEGRAIN; the predominant path was hybrid dependent | ||
| 653 | |a ZEA MAYS | ||
| 653 | |a NITROGEN | ||
| 653 | |a INTER - PLANT VARIABILITY | ||
| 653 | |a NUE | ||
| 653 | |a FERTILIZATION | ||
| 700 | 1 | |9 22317 |a Rossini, María de los Angeles |u CONICET. Centro de Investigaciones y Transferencias del Noroeste de la Provincia de Buenos Aires (CIT-NOBA). Buenos Aires, Argentina. |u Universidad Nacional del Noroeste de la Provincia de Buenos Aires. Escuela de Ciencias Agrarias, Naturales y Ambientales, (ECANA-UNNOBA). Buenos Aires, Argentina | |
| 700 | 1 | |9 5930 |a Otegui, María Elena |u Universidad de Buenos Aires. Facultad de Agronomía. Departamento de Producción Vegetal. Buenos Aires, Argentina. |u Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Pergamino (EEA Pergamino). Buenos Aires, Argentina. |u CONICET. Buenos Aires, Argentina. | |
| 700 | 1 | |a Martínez, E. L. |u Asociación de Cooperativas Argentinas. Production Research. Argentina. |9 67637 | |
| 700 | 1 | |9 7271 |a Maddonni, Gustavo Angel |u Universidad de Buenos Aires. Facultad de Agronomía. Departamento de Producción Vegetal. Buenos Aires, Argentina. |u Universidad de Buenos Aires. Facultad de Agronomía. Instituto de Investigaciones Fisiológicas y Ecológicas Vinculadas a la Agricultura (IFEVA). Buenos Aires, Argentina. |u CONICET – Universidad de Buenos Aires. Instituto de Investigaciones Fisiológicas y Ecológicas Vinculadas a la Agricultura (IFEVA). Buenos Aires, Argentina. | |
| 773 | 0 | |t Field crops research |w (AR-BaUFA)SECS000083 |g Vol.216 (2018), p.141-149, tbls., grafs. | |
| 856 | |f 2018rossini |i en reservorio |q 2018rossini |u http://ri.agro.uba.ar/files/intranet/articulo/2018rossini.pdf |x ARTI201808 | ||
| 856 | |z LINK AL EDITOR |u http://www.elsevier.com | ||
| 942 | |c ARTICULO | ||
| 942 | |c ENLINEA | ||
| 976 | |a AAG | ||