Performance of three staves and assessment of the quality of aboveground biomass of collection samples of Sudanese grass in the conditions of the Lower Volga region

Sudanese grass in the arid conditions of the Lower Volga region is able to produce a guaranteed harvest of green mass with high productivity and preservation of feed value. The article presents an assessment of the elements of productivity (plant height, bushiness, leafiness, yield), the biochemical composition of aboveground biomass, the yield of gross energy and the yield of feed units in collectible and foreign varieties of Sudanese grass of the first (39 samples), second (29 samples) and third (12 samples) stings. The stings were carried out during the phase of starting the sweeping of the panicles. The data obtained were processed using statistical analysis of the sample. Fully formed 3 mowing varieties of Sudanese grass - k-33, k-159, k-455, k-464, k-482, k-490, k-493, k-382, k-379, Izymrydnaya, Sennaya 2, Slavyanka. The yield of aboveground biomass totaled 17,8-38,9 t/ga. The protein content was 4,69-11% per 1 sting, 5,36-9,48% per 2 stings, and 5,28-8,23% per 3 stings. Based on the biochemical composition of dry matter of biomass and its yield, the yield of gross energy of samples of Sudanese grass of the 1st bite was determined, which varied significantly in samples – 47,37-227,34 GDj/ga; 2nd mowing – 12,62-61,79 GDj/ga; 3rd mowing -6,42-28,29 GDj/ga. Keywords: SUDANESE GRASS, MOWING, PRODUCTIVITY ELEMENTS, SAMPLE ANALYSIS, YIELD, BIOCHEMICAL COMPOSITION, OUTPUT OF GROSS ENERGY