Dynamics of water and nutrients in the integrated production system with the use of reject generated by the desalination of saline water from wells in the Brazilian Semi-Arid

Abstract

Isotopic analyses, physical and chemical are widely used in the understanding of biogeochemical cycles and hydrological processes involved in natural and man-made. The purpose of this study is to analyze the behavior hidroisotopic and balance of nutrients in the "Integrated Production System Using effluents from Desalination ", created by Embrapa Semi-Arid, as an alternative to the reuse of these effluents, installed in diffuse communities from Brazilian semi-arid through "Programa Água Doce". This system consists of three subsystems that complement sustainability. The scientific understanding of the system, through isotopic analysis, it may serve as indicator of improvement in the management of the system and reduction of environmental impact. To evaluate the dynamics of the water, in addition to the reasons ¹8O/16O and 2H/1H, determined in the laboratory of Isotopic Ecology of CENA, also will be measured to characterize the physical-chemical parameters of electrical conductivity, pH, nutrients, Dissolved Organic Carbon and Dissolved Inorganic Carbon in compartments involving the system as a whole, the collection of well until permeated the lisymeter and accumulation in plants. For the balance of nutrients will be carried out analyses of fertility (N, P, K, Mg, Ca e Na) in the effluent comes from aquaculture, in lisymeter (water, soil and plant) and the soil without interference for a comparison, also will be assessed the evapotranspiration involved in the various processes of the lisymeter system.