Attributes and microbial carbon and nitrogen stocks in irrigated Latosol under monocropping and intercropping

Abstract

Monocropping and intercropping maize and pasture irrigated areas in Promoting changes in soil biological attributes , However , little is known about changes in these environments ecotone between Cerrado and Caatinga . The aim of the study was to the evaluate attributes and microbial carbon and nitrogen stocks in soil under distrophic yellow Latosol of maize monocropping and intercropping and brachiaria of these cultures under two irrigation blades . The study was Conducted in the Alvorada do Gurgéia city , Piauí State , Brazil , During the year of 2009 the treatments Consisting of three production systems ( monocropping of maize and intercropping between maize and brachiaria and brachiaria ) , under two irrigation blades ( L1 = L2 = 647.9 and 564.5 mm ) and two soil depths ( 0-0.10 m and 0:10 to 0:20 ) . The variables were Analyzed microbial biomass , basal respiration , microbial quotient , metabolic quotient , the contents of total organic carbon , nitrogen and the carbon and nitrogen stocks . Biological attributes of the soil are influenced by monocropping and intercropping of maize and brachiaria , irrigation blades and soil depth . The blades of irrigation , by Influencing the water content in the soil , have greater effect on the microbial attributes , may Occur individually , as in the case of microbial carbon , or associated production systems of maize and intercropping brachiaria or under monocropping , is the detected of total organic carbon , and microbial metabolic quotient , nitrogen content and carbon and nitrogen stocks .