Avaliação de técnicas de captação de água na cultura do girassol no semiárido.

Abstract

To increase water availability to crops and conservation of soil and water resources in semi arid region has increased research in arder using of cropping systems under ram water harvesting techniques, and the use of these techniques can improve the sunflower (He//anfhus arlnuus L.) culture in the semiarid region Thus, in order to evaluate alternative systems of water harvesting 'fn s/fu' for sunflower cultivation in semiarid of Paraiba. The experiment was realized in 2011, under field conditions, at the Federal University of Campina Grande. Campus de Pombal, PB. The experimental design was a randomized block with four treatments and three techniques, ridges, furrows and basins, and a control without technique, repeated in six blocks in a total of 24 plots. Each plot consisted of four rows of six meters spaced in 0.5 m, covering an área of 12 m:, were used seeds of hybrid cultivars Helium 250 (H250), sunflower. We evaluated growth variables, the physiological and production, and the data submitted to analysis of variance by F test. The use of basin increased the infiltration and soil moisture retention, compared with the control (no techniques). The basin is the technique that causes more productivity in sunflower crop, this technique can to be recommended as alternative to optimize production system in semiarid Paraiba.