The Influence of Poultry Manure-Based Biocompost on the Productivity of the Crop Rotation Link "Spring Rapeseed → Winter Rye for Green Mass"

One of the most accessible methods for producing environmentally safe organic fertilizer from poultry manure is its composting. This process balances the nutrient composition of the manure and reduces physical and gaseous losses by slowing down the mineralization of organic matter. Research on the preparation of biocompost based on poultry manure, obtained under different poultry housing systems and combined with sawdust, as well as its impact on the productivity of the crop rotation link "spring rapeseed → winter rye for green mass," was conducted under vegetative trial conditions at the experimental site of Nizhny Novgorod State Agrotechnical University. It was established that the biocompost, applied at doses of 20, 40, and 60 g per container (equivalent to 10, 20, and 30 tons/ha under production conditions), reliably increased the seed yield of spring rapeseed by 5.7–6.5 times. However, as soil fertility increased, the grain yield improved only slightly (by 10.3–2.9% compared to the previous variant). The most significant residual effect of the biocompost was observed in the variant with the highest dose (30 tons/ha), where the maximum biomass yield of winter rye was achieved (3.5 times higher than the control variant and 1.9 times higher than with the minimum biocompost dose). Keywords: BIOCOMPOST, SPRING RAPESEED, WINTER RYE, POULTRY MANURE, TOTAL BIOMASS YIELD, SEED YIELD