Cultivo do feijão-caupi (vigna unguiculata) em diferentes manejos em Neossolo Flúvico

Abstract

The objective of this work was to evaluate the physical (Density, particle density, moisture, total porosity) and microbiological attributes (microbial biomass carbon, microbial biomass nitrogen, basal respiration) of the soil, and yield of cowpea cultivars (BRS Itaim, BRS Imponente, BRS Tumucumaque, BRS Novaera), under two management systems in a Fluvial Neosol. The experimental design adopted was a randomized block design with five replications. The soil management systems used were: (a) Conventional Planting (CPS); (b) Direct Planting (DPS). Soil samples were collected in two points per experimental unit for microbiological analysis in the 0.0-0.10 m layer and a single point per experimental unit of undisturbed samples was collected in the same layer for physical analysis. The physical attributes (except for Particle Density) and Basal Respiration presented significant differences by 5% in Test F, where it was verified that the management that mobilized the soil (CPS) was the one that most degraded it. The DPS productivity was statically higher than the CPS, the cultivar BRS Tumucumaque showed to be superior to the others for retaining carbon in the soil, the integration System x Cultivars showed to be significant in the release of carbon from the soil