Keywords:  grain waste, livestock by-products, composting, organic fertilizer, productivity, corn, nitrates.

Мелиорация.– 2026. – №1 (115). – P 29–33

The results of studies (2016‒2017) assessing the effect of organic fertilizer, obtained by composting grain waste and cattle manure, on corn productivity are presented. It has been established that this fertilizer is not inferior in composition to traditional organic fertilizers. The mass fraction of total nitrogen in it is  0,60 %, phosphorus –0,31 %, potassium – 0,37 %. The application of the developed fertilizer at a dose of 40–60 t/ha contributed to a significant increase in  the yield of green mass of corn and improved the nutritional value of the feed. In the variant with the use of this fertilizer, the yield of green mass of corn was  346,5–389,5 c/ha, in the control – 264,5 c/ha, the yield of dry matter – 89,1–102,1 c/ha and 61,4 c/ha, metabolic energy – 10,66–11,08 MJ/kg and 10,54 MJ/kg, feed unit yield – 81,97–101,08 c/ha and 55,26 c/ha respectively. When using the developed fertilizer at a dose of 40–60 t/ha, the nitrate content in the green mass of corn did not exceed the maximum permissible concentration.