Atributos físicos do solo e produção do milho influenciados pelo manejo do solo e da palhada da aveia

Abstract

No-tillage and minimum tillage with less soil mobilization and incorporation of crop residues, associated with cover crops that produce large amounts of waste, can hinder the successor crop implementation process making it necessary to use specific implements for the management of the crop. However, soil management and crop residues affect soil attributes, which can be a limiting factor for crop development. Therefore, the objective of this study was to evaluate the effect of straw and soil management systems on corn yield components and soil attributes. The experiment was conducted at the Experimental Farm of Agricultural Sciences of UFGD, being cultivated oats autumn-winter period of 2017 and 2018, and in October the management of straw and successively soil management. Corn was sown in October, in the 2017/2018 and 2018/19 crop, in a randomized block design in a split-plot scheme with four replications, consisting of six treatments in the plots. knife, crusher, mower, grader, two harrows and herbicide) and three in subplots with soil management systems (no-till more than 10 years, annual subsoiling and four-year subsoiling). Agronomic components were evaluated: final stand, longitudinal seedling distribution, stem diameter, plant height, first ear insertion height, ear length, ear diameter, number of grains per ear, weight of 1000 grains and yield. ; on soil attributes: percentage of cover, soil porosity and penetration resistance. Data were analyzed by analysis of variance and when significant by Scott-Knott test at 5% probability. The soil management with annual subsoiling reduces soil cover and corn plant stand. Straw and soil management do not affect corn yield.