| Texto completo | |
| Autor(es): |
Checchio Mingotte, Fabio Luiz
;
Leal, Fabio Tiraboschi
;
Yada De Almeida, Marcela Midori
;
Morello, Orlando Ferreira
;
Loeiro Da Cunha-Chiamolera, Tatiana Pagan
;
Lemos, Leandro Borges
Número total de Autores: 6
|
| Tipo de documento: | Artigo Científico |
| Fonte: | REVISTA CAATINGA; v. 34, n. 1, p. 11-pg., 2021-01-01. |
| Resumo | |
Determining nitrogen (N) accumulation and export by common bean as a function of straw and of the splitting of this nutrient is very important, aiming at the management and sustainability of agricultural systems. This study aimed to determine the N accumulation and export by common bean as a function of Zea mays and Urochloa ruziziensis grass straw (maize, maize/U. ruziziensis intercropping and U. ruziziensis) and splitting of top-dressing N fertilization. The experiment was conducted in Jaboticabal-SP-Brazil, during the 2012/13 crop season, in a Red Eutrophic Oxisol (Eutrudox) in no-tillage under irrigation. The experimental design was a randomized block with split plots with four replicates, totaling 120 subplots sized in 25m(2) each. The plots consisted of the cropping systems prior to common bean: maize, maize/U. ruziziensis intercropping and U. ruziziensis. The subplots were composed of ten top-dressing N fertilization splitting schemes (NS) at the phenological stages V3, V4 and R5 in different combinations. Common bean grain yield differs among cropping systems and as a function of top-dressed N split application. U. ruziziensis grass as single crop promotes greater N accumulation in common bean shoots compared to maize and its intercropping with U. ruziziensis grass. Regardless the cropping system, top-dressing N application in a single dose (90 kg ha(-1)) at V-4 leads to similar accumulations and exports to those found in the absence of N fertilization. Splitting schemes with N application at the R-5 stage increase the exports of this nutrient by common bean in succession to maize and its intercropping with U. ruziziensis grass. (AU) | |
| Processo FAPESP: | 11/07840-9 - Parcelamento do nitrogênio no feijoeiro em sucessão a milho e braquiária no plantio direto |
| Beneficiário: | Fabio Luiz Checchio Mingotte |
| Modalidade de apoio: | Bolsas no Brasil - Doutorado |