EFFECT OF ZERO-TILLAGE AND PHOSPHATE FERTILIZATION IN YIELD AND QUALITY OF SUNFLOWER

Abstract

Field experiment was carried out to determine the effect of zero tillage planting compared to conventional agriculture(tillage before planting) and phosphate fertilizer P2O5 (100, 200 and 300 kg.ha-1)in some growth traits and yield of sun flower cultivar Aqmar, in the fields of Agriculture Faculty. The results of the statistical analysis showed no significant difference between tillage and no-tillage regarding to the yield traits and its components (the number of seeds in the disk and the weight of 100 seeds) and the percentage of oil in the seed during both seasons except the weight of 100 seeds. Phosphate fertilization levels of 200 and 300 kg.ha-1 were superior in all other traits compared to 100 kg.ha-1, which indicates the possibility of using the level of 300 kg ha-1 to improve the traits of the yield and its components. It can be concluded from this study that the cultivation of sun flower species Aqmar without tillage and applying phosphate at level of 300 kg.ha-1 will reduce the cost and shorten the time to get to the final production.