Sunflower in cultivation systems and organic fertilization

The aim of this research was to develop a cultivation system for sunflower using appropriate in situ water collection and organic fertilization technologies. An experiment was carried out at the Centre for Agri-Food Sciences and Technology at the Federal University of Campina Grande in a randomized block design with a 4 x 5 factorial scheme four cultivation systems: trench furrow basins corresponding to water harvesting techniques and a control referring to the conventional planting system and five doses of cattle manure (0; 2.5; 5; 7.5 and 10 L m-2 ) forming twenty treatments with six replications. Morphophysiological and production aspects were evaluated. It was found that the furrow-type water collection technique and 10 L m-2 of manure increased the soil's moisture conservation capacity which was reflected in the physiological growth and production variables. The sources of variation studied showed interaction-dependent behavior for photosynthesis and growth responding to the amounts of manure linearly in furrows and trenches and quadratically in basins and conventional planting.