PRODUCTIVITY AND NUTRITIONAL VALUE OF ANNUAL LEGUME-CEREAL AGROPHYTOCENOSES DURING HARVESTING FOR FODDER PURPOSES

In the experimental field of NWNIIMLPH from 2012 to 2020, the productivity, nutritional value, and species composition of annual mixtures including new and promising varieties of leguminous crops were studied, depending on the seeding rates and composition. The soil under the experiments is sod-podzolic, medium loamy, medium cultivated, drained by closed drainage. The doses of mineral fertilizers in experiment 1 were N30P30K45 kg /ha, in experiment 2 – N30P45K60 kg/ha of the active substance. Legume-cereal mixtures in experiment 1 consisted of the following crops and varieties: Vologda moustached field peas, spring Lgovskaya vetch-22, Borrus oats, barley Choice. For the formation of mixed crops in experiment 2, the following were used: Aksai mustachioed peas-55, narrow-leaved Oligarch lupin, Assorted spring vetch, Red Bogatyr fodder beans, ryegrass Rapid, spring oats Yakov. In field experiment 1, a mixture of field peas with spring oats (60:40%) was isolated, providing a yield of 5.04 t/ha of dry matter and a collection of raw protein of 580 kg/ha. On average, 4.34-5.78 t/ha of dark matter, 370-510 kg of crude protein were obtained over the years of research on field experiment 2. A significant yield advantage of 1.12–1.39 t/ha of dry matter for control was provided by mixtures with annual ryegrass (var. 7, 8 and 10) due to two mowing.