Efeito de lâminas de água aplicadas como irrigação suplementar no ciclo do milho safrinha sob plantio direto.

Abstract

One of important aspect in the irrigated agriculture is the knowledge of the amount of water requested by the cultures for the satisfactory development of the plants. Several works have been showing the importance of the irrigation as mechanism of supplying possible hydrics deficiencies during the culture physiological cycle, showing that the effects of hydrics deficits change with the development step. When the plants are more sensitive the dynamics of availability of the soil is called critical period. In this fact, the work was to evaluate different applied sheets of water as supplemental irrigation in the cycle of the corn “safrinha” under direct planting, it influence in the physiology, productivity and economical viability. The results was: the increment of the applied sheets turned lineal answers in the physiology of the plant; the supplemental irrigation went essential to increase the productivity of the corn “safrinha”; and the largest productivity for the corn “safrinha” didn't become larger net income.