Atributos físicos de um Planossolo e produtividade de arroz em sucessão com soja no sistema sulco-camalhão em terras baixas

Abstract

The rice crop planted directly on the harvested soy crop in a ridge-furrow system is a promising alternative, mitigating costs due to land preparing (less use of machines, saving oil and labor) and allowing no-tillage, a beneficial practice to improve the physical attributes of the soil. The objective of this work was to evaluate the physical attributes and productivity of rice cultivated in an Planosol under the harvested soybean residues and in a ridge-furrow system. The experiment was carried out for two years (21/22 and 22/23 harvests) at Embrapa Clima Temperado, Experimental Station of Terras Baixas (ETB) located in Capão do Leão-RS. The following physical attributes were determined: soil density, soil porosity, hydraulic conductivity of saturated soil, resistance to penetration were the evaluated soil parameters, and grain yield of rice cultivars BRS Pampa and XP 113 was evaluated too. The results indicate lower density and higher total soil porosity in no-tillage rice planted on soybeans residues in the ridge-furrow system. Using the furrow. The physical attributes of the soil impact the rice productivity, under no-tillage with the decrease in soil density and increase in soil porosity, the rice yield was higher.