Atributos de qualidade física, química e biológica do solo sob diferentes sistemas de uso em ambiente semiárido da Bahia

Abstract

In the northeast of semiarid predominately cultivate desflorestation of native plants, followed by burning and agricultural exploration to the extent of weacking the soil physically, chemically and biologically. The objective of this research was to evaluate the influence of different systems use of some attributes in physical, chemical and biological quality of the soil: conventional tillage and poly culture in two different regions in the semiarid Bahia: one in the municipal district of Cafarnaum and another in the municipal district of Umburanas. The delineation was a complete casualty, with two systems of soil used and five repetitions (five points). It was concluded that: in two sites studied, comparing the use system with the poly culture system for conventional use, the poly culture stimulates microbial soil activity and at the same time, it shows a tendency of increase in microbial biomass carbon ; the municipal district of Umburanas shows the use of poly culture system, when compared to conventional use system, it shows more sustainable as the flow of carbon; in both locations studied, the values of penetration resistance do not indicate no physical impediment to root growth in the two systems use; at the two sites studied, there is a greater ease of movement of water in the soil system poly culture and with the poly culture system of soil used, was effective in increasing the organic matter content in both locations studied, indicate improvement in the quality of the soil chemical, however, it did not contribute to increase of the level of phosphorus in the soil.