Effect of mineral fertilizers and microbiological preparation on yield and nutrition of spring rape

Hybrids of foreign selection of spring rape were grown on the experimental field of the Northwestern Dairy Farming and Grassland Management Research Institute, located in the village of Dityatievo, Vologda District. The aim of the research is to obtain results on yield and nutritive value of green mass of hybrids of foreign selection of spring rape under the influence of fertilizers, biopreparation and interaction of mineral fertilizer with biopreparation in the conditions of the Vologda Region for two years of research. The relevance of the work is due to the selection of promising varieties and hybrids, technological methods of cultivation of spring rape. The scientific novelty is the study of the effect of mineral fertilizers and microbiological preparation based on Gram-positive spore-forming bacterium Bacillus subtilis on productive and nutritional indicators of spring rape hybrids in the conditions of the Vologda Region for two years of research. The area of the study plot was 10 m2, the number of variants in the experiment was 9, the repetition was threefold. Three hybrids of spring rape (Joy KVS, Jerome and Jazz KVS) were sown on different backgrounds: at sowing mineral fertilizers were applied at a dose of N90P60K60, seeds were inoculated with a biopreparation and fertilizers were modified with a preparation (Bisolbi-T). The yield of green mass on average for two years was obtained at the level of 13.6-19.8 t/ha. As a result, we revealed that when sowing spring rape on a mixed background, the yield of green mass increases. High yield was formed by hybrids Joy KVS (19.8 and 19.7 t/ha), Jazz KVS (17.9 and 19.4 t/ha) and Jerome (18.3 and 19.6 t/ha). The nutritional values ranged from 2.51 to 3.34% fat, 12.12 to 15.33% protein, 20.53 to 22.84% fiber and 10.27 to 10.59 MJ DE.