Agrology (Feb 2023)
Balance of nitrogen, phosphorus, potassium in the soil depending on farming systems in crop rotation
Abstract
The objective of the research was the influence of different agricultural systems in field crop rotation on the formation of the balance of basic nutrition elements on low humus chernozem typical. We used field and laboratory methods. In the biological agricultural system, a notable deficit of phosphorus and potassium was building up in the soil. The phosphorus balance intensity was 81% and such of potassium was 75%. Ecological system of crop rotation agriculture when applying N46P49K55 per 1 ha and 18 tons of organic fertilizers was determined as environmentally stable for nitrogen and phosphorus: the nitrogen balance intensity reached 117%, phosphorus – 152%, potassium – 98%. The calculation of balance under the intensive system in crop rotation (N92P100K108 + 12 tons of manure per 1 ha of crop rotation area of fertilizers applied) revealed a positive balance of nitrogen and phosphorus in the soil with a slight deficiency of potassium, with the intensity of its balance measuring 81%. Ecologically relevant balance of nutrients is the basis for the development of agricultural system. The balance and circulation of nutrients should take into account their sources and distribution in crop rotation.
