Atributos químicos, físicos e biológicos de um Neossolo Quartzarênico sob sistemas agroflorestais biodiversos

Abstract

The sustainability of the productive capacity of a soil is due to the type of land use and management system, which makes it necessary to adopt practices and technologies that aim at the continuity of the exploitation of its resources in a rational and long term way. The objective of this work was to evaluate the soil attributes of a Neossolo Quartzarênico and its ability to sequester carbon under biodiverse systems for two consecutive years. Chemical, physical and biological attributes and carbon sequestration capacity of six different soil use systems were evaluated: four Agroforestry Systems, a consolidated no - tillage system and a native forest area in good conservation status. Soil samples were collected at depths of 0-5 cm, 5-15 cm, 15-30 cm and 30-50 cm for the chemical, physical and carbon analyzes in the soil and at depth of 0-10 cm for the microbiological analyzes. Data were submitted to analysis of variance and the Scott-Knott 5% mean test, and as a complementary analysis we used the multivariate canonical analysis technique and the Tocher grouping method. The SAF4 system was the system that presented the most promising as the characteristics evaluated. The management of this system favored soil fertility even though it was extremely sandy and did not compromise soil structure, provided greater efficiency of microbial biomass, increased nutrient cycling, organic matter production, humification and carbon storage capacity. the system that presented the best results for the physical characteristics of the soil evaluated.