Diferentes fontes e doses de fósforo nos teores dos nutrientes no arroz sequeiro

Abstract

The objective was to evaluate the residual effect of phosphate fertilizers with different doses and nutrient sources for nutritive plants without the second year of cultivation. The experiment was carried out in a greenhouse of the Federal University of Mato Grosso, in Barra do Garças - MT, in the sowing area. 3 dm-3 . The experiment was conducted in a completely randomized design in a 6x3 factorial scheme with three replications. Different doses of anterior phosphorus (0, 25, 50, 100 and 200 mg dm -3) were used, totaling 54 plots. The diagnosed leaf was collected at stage R2, the layers were removed after 112 days and placed in a 65 ° C oven for 72 hours. The samples then went through the grinding process and were weighed, and forex digestion of sulfuric acid to determine nitrogen and nitrogen digestion. for the settlement of other nutrients. For statistical analysis, a variance analysis was performed using the F test. The results obtained were compared by the Tukey test (5%) and as doses by the polynomial regression analysis. In the aerial part, the doses of P increased the contents of K, Mg and Mo and decreased the contents of Mn and Zn. In the diagnostics leaves, doses of P increased in the doses of K, Mg and Mo and decreased the contents of Mn and Zn. In the grains, the doses of P increased the contents of N, P and Mg and decreased the contents of Fe and Mn. Mültifos phosphate was the font that most increased the nutrient content.