تاثير السماد المعدني و العضوي في النمو و بعض مكونات محصول صنف القطن حلب 90

The research was carried out during 2005 -2006 in Al-Hasaka to study the effect of 2 rates of organic matter, 20 and 30 ton/ha, compared to the mineral fertilizer 400 kg / ha1 uria 180 kg / ha1 P2O5, and50 kg K2O/ha1. The rate mineral fertilizer significantly increases plant height, number of branches just to flowering stage, while adding rate 30 ton /ha organic matter caused significant increase in plant height, number of fruiting branches, number of flowering, number of bolls, weight boll, yield seed cotton and yield lint compared with rate 20 ton/ha1 and the mineral fertilizer. On the other side, rate 30 ton /ha1 significantly decreased shedding percentage compared with rate 20 ton / ha1 organic matter and the mineral fertilizer. There was no significant effect of fertilizer on the number of vegetative branches, lint percentage and seed index during the two seasons.