The yield of goatskin oriental (galega orientalis), depending on the level of nutrient content in gray forest soil
The models of the action of nitrogen, phosphorus and potassium fertilizers on the concentration and ratio of elements in gray forest soil were compiled for the first time on the basis of a systemic approach to the assessment of the N, P, and K contents in the biochemical chain soil-plant. Experimental plots are located in the subtaiga zone of the Omsk region, the soil of the experimental field is gray forest, characterized by a low content of nitrate nitrogen and exchangeable potassium in the soil layer 0-20 cm, an average content of humus and mobile phosphorus. Research conducted in 2013-2016. with long-term legume culture - goat’s eastern show that the use of mineral fertilizers on gray forest soils changes the concentration and ratio of nutrients in the soil solution. Dependences between the yield of goat ivory and imported doses of mineral fertilizers in different combinations are revealed, based on the possibility of forecasting the needs of plants under specific conditions of agricultural production. Demonstrated prediction formulas and empirical equations for the connection of the green goat’s eastern mass yield to the content of mineral nutrition elements in the soil. It is established that the introduction of mineral fertilizers contributes to the increase in yield. With an increase in soil P<sub>2</sub>O<sub>5</sub> content by one mg/kg, the yield of gazelle East increases by 0.58 t/ha, and the increment from each kilogram of introduced K<sub>2</sub>O is 0.77 t/ha. In order to obtain a yield of 142.0 t/ha in gray forest soil, an average of 15.2 mg/kg of nitrate nitrogen, 150.2 mg/kg of mobile phosphorus and 116.7 mg/kg of exchangeable potassium should be maintained on average during the growing season. Experimental data allow us to predict the specific yield of the goat’s biomass of the eastern cultivated on the gray forest soil of the Omsk Irtysh region.