Mostafa khammar - Young Researchers and Elite Club ,Zahedan Branch, Islamic Azad University, Zahedan, Iran
Hamid Reza Fanaei - Agriculture and Natural Resources Research Center of Sistan, IRAN
Mahshid sargazi - Department of Agronomy, Islamic Azad University, Zahedan Branch, Zahedan, Iran
sajad keikhaei - Department of Agronomy, Islamic Azad University, Zahedan Branch, Zahedan, Iran

Sorghum (Sorghum bicolor) is a warm-season annual grass with great ability to produce high forage biomass yields. It can be used for the production of energy, fibre or paper, as well as for syrup and animal feed. Sorghum is a highly drought-tolerant field crop. Identification of cutting intervals and cutting heights that optimize the net forage accumulation and delay senescence and stem accumulation would favor the efficient accumulation of large quantities of highly nutritious forage. The field experiment was laid out split plot with randomized complete block design with four replications. Treatments included cutting height (b1= 0, b2=5, b3=10, b4=15) and variety (feed speed, pegah, indian). Analysis of variance showed that the effect of variety and cutting height on all characteristics in was significant.

Plant height, wet forage, dry forage