Nitrogen fertilizations via leaf on soybean stages and nitrogen released on yield of off season maize

Abstract

The objective of this study was to evaluate the residual effects of nitrogen (N) fertilization liberation of mulching soybean crop in the yield corn of-season. The sowed was the corn hybrid Land® in date 01/26/2017, of mulching soybean crop experiment, in Sinop-MT, Brazil. The experimental design was a randomized complete block with four replications with teen treatments. The treatments were: control without N application (only inoculated with Bradyrhizobium japonicum e B. elkanii) and the other treatments was applied the dose of 10 kg ha-1 of N in different phenological stages and modes of application (the cover in the sowing; in V2 the haul in coverage; in V2 via leaf; in V4 the haul in coverage; in V4 via leaf; at R1 the coverage haul; in R1 via leaf; in R2 the cover and R2 in the leaf). The traits components of the yield analyzed were: number of rows of grain, number of grains per rows, the thousand-grain weight and yield grains. The mineralization of the nitrogen provenient of mulch the soybean crop is not sufficiency for corn off-season crop. The application of nitrogen in the stages V2 and R1 in coverage in the soybean predecessor crop provided the highest values to yield grains of the maize off-season crop.

Keywords

• zea mays. mineral nitrogen. leaf fertilization. demand of nitrogen in maize. mulching of soybean crop.