عنوان مقاله [English]
نویسندگان [English]چکیده [English]
In order to investigate the effect of nitrogen fertilizer, manure and integrate fertilizer on quantitative and qualitative yield of two forage sorghum cultivars (Pegha and Esphidfid) under Guilan climatological conditions a field study was conducted in 2010 cropping season at Rasht. Treatment consisted of four levels of nitrogen fertilizer (0, 46, 92 and 138 kg N.ha-1) and organic Farm Yard Manure (5, 10 and 15 ton.ha-1 FYM) and integrated N of chemical and biological (23 kg N.ha-1 + 2.5 ton.ha-1 farm yard manure (FYM), 46 kg N.ha-1 + 5 ton.ha-1 FYM and 69 kg N.ha-1 +7.5 ton.ha-1 FYM). A randomized complete block design with factorial arrangement in three replications was used. Traits included plant height, stem diameter, plant dry weight, forage yield, protein percent, dry matter digestibility and ash. Stem diameter, protein percent, dry matter digestibility, water soluble carbohydrates percentage, NDF, total ash effected by Nitrogen significanty, and maximum traits was obtained with 69 kg N.ha-1 + 7.5 ton.ha-1. Based on the results obtained from this study integrated treatment was best and Pagha cultivar with 69 kg N.ha-1 + 7.5 ton.ha-1 suggested in Rasht reign conditions.