Efficiency of phosphorition of the chernozem soils of northern forest-steppe of Kurgan region
Studies assessing the effectiveness of the use of phosphorition in a four-field grain-pair crop rotation under the conditions of the northern forest-steppe of the Kurgan region were conducted in 2014-2018 in the “Rassvet”. Evaluation of the effectiveness of the use of phosphorition of chernozem soils in grain-pair crop rotation under the conditions of the northern forest-steppe zone of the Kurgan region was the purpose of the research. The leached chernozems of “Rassvet” of the Shadrinskiy district of the Kurgan region are characterized mainly by a weak acid reaction and an average humus content. The content of mobile phosphorus is low, the content of exchangeable potassium is high. The use of phosphorition allows stabilizing the acid-base condition of the soil and optimizing the content of mobile phosphorus. In 2015-2018, the use of phosphorition under conditions of the northern forest steppe of the Trans-Urals on chernozem soils with pH < 5.5 units and mobile phosphorus content in terms of P2O5 less than 50 mg/kg in the norm of 0.6 t/ha once for the rotation of grain-pair crop rotation provides yield increase by an average of 4.1 %. At the same time, the hydrolytic acidity decreases by 8.8 %, and the amount of absorbed bases increases by 7.5 %. The use of phosphate rock provides an increase in the protein content by 34 %, gluten by 30 % compared with the control. It is advisable to conduct further research in the direction of an increase in the rate of introduction of phosphate rock to 2-2.5 t/ha once for the rotation of the crop rotation.