Efficiency of Processing Products Application of Biogas Plant in Greenhouse Farming

Abstract

Abstract. The article contains the results of scientific research on the possibility of using solid processing products of bird droppings in the biogas plant of OOO "NPO "Agrobiogaz", St. Petersburg (hereinafter -solid biofertilizer or TBU) in the substrate composition when growing onions in protected soil conditions. The chemical composition of biofertilizer has been studied: 1 ton of natural substance contains, an average, 16.5 kilogram per ton of total nitrogen, 20 kilogram per ton of total phosphorus, and about 16 kilogram per ton of total potassium, as well as microelements. TBU -biofertilizer -a product, that positively influences in mixtures with a mineral substrate on soil fertility in conditions of protected soil. The profitability of onions production is maximum in variants with the use of biofertilizers -254-260%, which is 60-65% higher than other options, and the production cost of 1 kilogram is the minimum -12.7-20 rubles per kilogram.