Effects of Different Fertilizing Systems using Green Manure and Zeoponix on Quantitative and Qualitative Yield of Sunflower in Sequential Cropping



To study the effects of different fertilizing systems using green manure and zeoponix on grain yield and its components in sunflower, an experiment was conducted at the Research Farm of Collage of Agriculture, Tarbiat Modares University in 2010 and 2011. The Experimental treatments were arranged as split plot design on the base of a complete randomized block design with three replications. Two farming systems (with and without green manure) were assigned to the main plots and different fertilizing treatments consisted of zeoponics (control), zeoponics+25% chemical fertilizer, zeoponics+50% chemical fertilizer, and zeoponics+75% chemical fertilizer were assigned to the sub plots. The combined analysis of variance showed that using green manure in crop sequence increased the number of seeds per head. Interaction of green manure and zeoponix application affected biologic yield of sunflower. Green manure and 100% zeoponix and green manure and 25% zeoponix + 75% chemical fertilizer were the superior treatments. The highest amounts of 1000 seed weight, seed yield and oil yield were observed in 100% zeoponix and then 50% zeoponix + 50% chemical fertilizer treatments. These treatments were known as the best treatment to introduce for farmers to use. The highest protein percentage was observed in 25% zeoponix + 75% chemical fertilizer and 50% zeoponix + 50% chemical fertilizer. Regarding to oil quality, palmitic acid percentage was decreased by presence of green manure in crop sequence.