Integração lavoura-pecuária-floresta : caracterização química e microbiológica do solo

Abstract

Production systems that integrate agriculture and forest management practices are looking to maximize the area use, integrating major crops with forest species. The objective of this study was to evaluate, during the rainy and dry, the chemical characteristics: pH, calcium, magnesium, aluminum, potential acidity, phosphorus, potassium and organic matter, and microbiological: microbial biomass carbon, basal respiration, the ratio metabolic, microbial quotient, acid, alkaline phosphatase and þ-glucosidase activity, and colony forming units counting in a Dystrophic Red-Yellow Latosol (LVAd) system integration in Crop-Livestock-Forestry (iCLF), soybean/pasture and native forest. Chemical analysis of soil samples were collected during the rainy season, March 2010, and collected samples deformed at depth 0,0 to 0,20 m and that within each treatment, four blocks were delimited hypothetical and within blocks of single samples were collected in two lines, two sublines in the forest and four samples from crops or pasture, with eight replicates for treatment, and the same procedure was performed in the areas of soybean/ pasture and native forest. For microbiological analyzes, the samples were collected at a depth from 0,0 to 0,05 m at followed the same characteristics of the sample collection for chemical analysis of soil being carried out during the rainy and dry seasons, March and October , 2010. The data were statistically evaluated by nonparametric Kruskal-Wallis test. It was found that the soil under the systems integration Crop-Livestock-Forest, the chemical characteristics have been changed positively and the presence of microorganisms and their activity remained constant in the evaluation periods.