The influence of sugar beet lime and Synorhizobium meliloty on the yield and nutritional advantages of Medicago polymorpha under the conditions of Primorsky region

The purpose of research is to establish the effect and aftereffect of sugar beet lime and inoculation of seeds of Synorhizobium melilody on the yield and fodder quality of alfalfa of the 1st-4th years of life. Objectives: to establish the effectiveness of the action and aftereffect of sugar beet lime and pre-sowing treatment of seeds with rhizobia strains of Synorhizobium meliloty on the yield of green and dry mass, as well as on the nutritional and energy value of alfalfa phytomass Vega 87. The total collection of green mass of alfalfa for four years of life (ten cuts) in the variant with the use of sugar beet lime increased by 18.3 %; in variants with presowing treatment of seeds with rhizobia strains - by 7.9-11.5; with their combination - by 23.4-28.8 %, and the yield of dry mass - respectively 28.8; 10.7-13.7; 37.6-42.0 %. The maximum increase in yield is obtained by pre-sowing treatment of seeds with strain A4 with the introduction of an ameliorant, and without the use of sugar beet lime, inoculation with strain 425a. In all variants of the experiment, alfalfa herbage formed a plant mass with high energy and nutritional value. The yield of feed units per 1 ha, depending on the studied factors, increases by 1.1-1.4 times, with the highest value in the variant with inoculation with strain A4 against the background of sugar beet lime. The collection of digestible protein increases 1.3 times with the introduction of sugar beet lime, 1.2-1.3 times with the inoculation of Synorhizobium meliloty seeds, and 1.5-1.6 times with the combined action of the ameliorant and bacterial preparations. The highest yield of fodder units, digestible protein and metabolic energy per 1 ha was obtained in the variant with seed inoculation with strain A4 against the background of liming, and without liming background, with seed inoculation with strain 425a. The use of sugar beet lime and bacterial preparations in the cultivation of alfalfa increases soil fertility, the productivity of cultivated crops and the environmental sustainability of agrocenosis, and also contributes to saving resources and protecting the natural environment.