Evaluation Of Performance Of Some Varieties Of Sorghum Bicolor L. Under Different Levels Of Nitrogen Fertilization

Abstract

A field experiment carried out in Iraq with two locations. The first location was in Al- Eslah district southeast Nassiryah city, while the second location was qalat sekar district north Nassiryah in 2016. The factors that used in an experiment were four cultivars of sorghum (Kafer, Al-khayer, Rabeh, and Enqadh) with three levels of Nitrogen fertilizers (80,100 and 120 ) kg/ha-1. The layout of the factorial experiment was R.C.B.D. with three replications to evaluation the performance of cultivars according to Nitrogen levels. Studied traits were (plant height, stem diameter, leaf area index, wet and dry forage weight, seed number and seed yield). The results of analysis variance showed significant differences among cultivars, fertilizer levels and locations in all traits. Also the Enqadh and Rabeh cultivars overcome significantly in seed yield (5.717, 5.543) ton/ha-1 respectively. The fertilizer level (100) kg/ha-1 was the best than other levels. The significant difference showed that between locations in dry forage weight and Leaf area index. Also, the interaction between cultivars and fertilizer levels was significant in dry forage weight.