Authors:
M. A. TORMOZIN, candidate of agricultural sciences, leading researcher,
А. В. BELYEV, senior researcher,
Е. М. TIKHOLAZ, junior researcher,
Ural Agricultural Research Institute – branch of FSBSI UrFASRC UrB of RAS (21 Glavnaya str., 620061, Ekaterinburg, p. Istok).
Abstract. The article presents the influence of age of grass on seed productivity of perennial grasses. Experience in production, planted in seed crops of Bromopsis inermis 1st, 2nd, 3rd and 4th years of use. The area of accounting plots of 2 hectares. Accounting for seed yields was carried out by combine. Accounting for the structure of seed productivity-on the accounting plots with an area of 1m2 in 6 times the repetition. The intensity of the shoots increases with age (for most species at the 3rd and 4th years of life). In the future, the thickening of the grass occurs. The highest biological yield of seeds of aweless Bromopsis inermis year of use and was 1.6 t/ha. Seed production of grasses determines the number of generative shoots in the herbage and productivity of their inflorescences, an analysis was conducted of the structure of crops of crops of smooth Bromopsis inermis purposes. The number of generative shoots varied depending on the age of the grass stand. The number of generative shoots increased until the second year of use. Compared with the first year of use, it increased by 70 pcs/m2 . Since the third year of use, the number of generative shoots has decreased as a result of the reduction of the area of food and lighting. To improve the quality of seeds in recent years, use increased doses of fertilizers. With the age of the grass stand, the number of generative shoots, the size of seeds and their mass, the productivity of the inflorescence and, as a result, the productivity of seeds decreases.
Keywords: Bromopsis inermis, grass, seed production, seed production, varieties.
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