Nutritional monitoring of wheat by using the index of nutritional balance - DRIS

Abstract

Nutricional deficiency in wheat crop causes serious damages to the productivity and the quality. Often the fertilization is focused in the macronutrients, not accounting the necessity of the micronutrients in the development of the plant. In order to evaluate the nutritional intervention using DRIS method in a wheat crop already installed, an experiment was set on a soil classief as "Latossolo Vermelho" , in Cândido Mota, SP. The experimental design was totally randomized, with three treatments and four replications. All treatments received fertilization at sowing with 250 kg ha-1 of 08-20-20 formulation. The Regional treatment received more 40 kg ha-1 of nitrogen after 30 days of emergency (dae) and the monitored one, received a nutritional supplement in agreement with DRIS analysis each 30 days after emergency. In the monitored treatment it was applied calcium and boron at 30 dae, nitrogen and boron at 60 dae and phosphorus and boron at 90 dae. The monitored treatment yielded 21.80% more than the regional one. The nutrional interference through DRIS provided nutritional and yield improvements in wheat crop.