Yield of stalks and exportation of major nutrients by sugarcane (saccharum spp.) varieties. / Produção de colmos e exportação de macronutrientes primários por cultivares de cana-de-açúcar (Saccharum spp.).

AUTOR(ES)
DATA DE PUBLICAÇÃO

2003

RESUMO

The vinasse, a residue of sugarcane processing, can be an environmental risk. It is a potassium source that can be used for fertilization on sugarcane, which is a very important crop in Brazilian agriculture. The selection of varieties that shows high sugar yield per area unit and the determination of the amount of major nutrients in this crop has importance on achieving high yields. Twelve varieties were grown in a Hapludox and in a Kandiudalf soils in the state of São Paulo, Brazil, in vinasse application areas, during three harvests. The varieties presented yield differences, in each soil, as function of genetic characteristics, of the agricultural year and the set of management practices used. The variety RB 835089 presented a good adaptation, while the varieties RB 72454, SP 80-1842 had presented intermediate performance in the two soils used in the experiments. The varieties RB 835486, RB 845257 and RB 825336 adapted better in the Oxissol and the varieties SP 80-3280 and RB 855536 to the Alfisol. The varieties nutrients concentration varied with the soil, the agricultural year, the management practices and the adaptation environment. The order of exportation of primary macronutrients was K>N>P. The exportations of nutrients had soil effects: in the Oxisol - 71; 14,2 (32,1 - P2O5); (169 - 141 K2O) kg ha -1 of N, P and K, respectively, and in the Alfisol - 94; 9,2 (20,7 – P2O5) and 257 kg (310 – K2O) of N, P and K, respectively.

ASSUNTO(S)

colmos nutrientes minerais do solo vinass. cana-de-açúcar exportação variedades vegetais soil mineral nutrients exportation stalks varieties vinhaça. sugarcane

ACESSO AO ARTIGO

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