Sudan grass (Sorghum × drummondii) is grown after alfalfa and corn as the main fodder crops in developed countries. Sudan grass is a perennial plant that is resistant to salt and drought. This article provides information on the effects of planting Sudan grass at different rates and harvesting at different times in saline soils of the Syrdarya province, Uzbekistan, on plant growth, yield formation and nutrient quality. Sufficient results were obtained when Sudan grass was planted at 25 kg per hectare and harvested at 50% flowering phase. Experiments were carried out in soil-climatic conditions of the experimental production base of the Syrdarya Scientific Experimental Station of the Research Institute of Cotton Breeding, Seed Production and Cultivation Agrotechnologies.

Since plants absorb solar energy with the help of their leaves, it is important to create plantations where the leaf area is optimal, which can be achieved by correctly determining the planting rate of crops and ensuring optimal thickness of seedlings. The objective of this research is to determine and justify optimum planting rate, which ensures a high yield of bluegrass in the saline soils of the Syrdarya region. During the research experiment, field experiments were conducted on the basis of “Methodology of State variety testing of agricultural crops” and “Methods of conducting field experiments”. The results showed that the leaf surface increased by 4.6 thousand m2/ha when the planting rate was 25 kg/ha, and it was noted that when the planting rate increased to 30 kg/ha, the leaf surface decreased by 0.7 thousand m2/ha compared to the previous option. Moreover, the total green yield was 65.6 and 2.7 q/ha compared to the yield obtained in the tuber phase.