Influence of mineral nutrition on the productivity of perennial legumes

Abstract

The results of the studies of different doses of dressings on the yield and nutritional value of green mass of clover for two years use are presented. The experiment was carried out in April 2017 on No. 3 scientific field of the FSBSI «Adyghе Research Institute of Agriculture using B.A. Dospekhov’s method. The experiment was repeated 4 times, the arrangement of repetitions and variants was systematic. The object of the research was Abadzekhsky local red clover variety. In the research a moldboard method of tillage was used to a depth of 20–22 cm. Analysis of the data obtained showed that the maximum yield of green mass of clover, both I and II, was obtained in the variant with an increased background of mineral nutrition and amounted to 15,1 t/ha; 25,1 t/ha. The yield of clover hay in the first and second years of life with the application of the highest dose of nitrogen fertilizers (N45) was 4,8 t/ha and 7,2 t/ha. Complete zootechnical analysis of the nutritional value of the green mass of red clover I g. showed that 1 kg of dry feed contained 0,75–0,80 g/kg of feed units. The provision of digestible protein in the green mass of clover increased with an increase in the background of mineral nutrition 77,7–98,8 g/kg. The content of metabolizable energy in 1 kg of dry food was 8,7–9,3 MJ. The fodder value of green mass of clover of II y. showed that the content of digestible protein varied in the options within 74,0–94,1 g. The content of feed units in 1 kg of dry feed was 0,75–0,86 g, metabolic energy 9,6–10,3 mJ. The content of digestible protein, feed units and metabolizable energy on these variants corresponded to the I and II class of feed.