Agrochemical standard indicators for the mineral nutrition of potatoes in the forest-steppe of Western Siberia

The agrochemical standards for the mineral nutrition of potatoes when using mineral and organic fertilizers in the forest-steppe of Western Siberia for plant nutrition management were experimentally determined. The research was conducted at the Experimental Field of Omsk State Agrarian University in 2012-2014. Objects of research was the potato variety “Alaya Zarya”, cultivated on meadow-chernozem soil with average fertility, average humus content and average loam content using mineral fertilizers, organic fertilizers based on rotten liquid chicken manure. The following minerals were contained in the soil before sowing: N-NO3 - 6.1-10.4; P2O5 - 111-124; K2O - 256-274 mg/kg. When using organic fertilizers based on liquid chicken manure, the most effective dose was 12 t/ha, with an increase in the yield of potato tubers up to 10.3 t or 45.0%. In equivalent doses, organic and mineral fertilizers provide almost the same yield. The quantitative characteristics of mineral nutrition of potatoes with the application of fertilizers have been established: the quantity of nutrients in liquid chicken manure, the utilization coefficients of elements from the soil and fertilizers, the intensity coefficients of the impact of 1 t of liquid chicken manure on the nutrient content in the soil, the leaching per production unit, the nitrogen of current nitrification.