Crescimento e produção do pinhão manso sob adubação fosfatada e irrigação com água residuária.

Abstract

Faced with growing global population, die rapid industrial development, reduction of world oil reserves and environmental concerns there is a search for new alternatives of renewable energy matrices that are both environmentally friendly, socially sustainable and economically viable. Given fjhmthe cultivation of jatropha (jatropha burcas L.) has been emphasizing more on the national scene, due to some intrinsic characteristics of culture, being a perennial plant of the Euphorbia family., resistant to adverse conditions of climate and soil and a potential for oil production for energy purposes, considered quite high. Since studies on. this crop because of its recent exploration and to study and improve the yield of this culture was developed at the Federal University of Campina Grande-PB, a study comparing levels of wastewater and phosphorus fertilization on growth and yield of jatropha under protected green house. The experiment was conducted in randomized blocks in factorial scheme [ 4 x 5 ] + 1. whose factors were four levels of available soil wastewater (50, 75, 100 and 125%) and five P rates (0, 100, 200, 300 and 400 tog / kg soil) and a control with water supply with 100% exclusive only fertilizer N and K., with three replicates, thus experimental plots. Where for the lactbrs studied, which, was more of nutrition lor the wastewater plant was rich in nutrients essential for growth and development of jatropha and doses of phosphorus, the best results were mainly related to the diameter stem. With respect to the U.S. increased availability of water in the sol resulted in higher efficiency of water use by plants jatropha. production.