The influence of systematic fertilization on soil fertility when growing winter wheat

Abstract

The article presents the results of studies of the systematic use of organic and mineral fertilizers on the parameters of fertility of gray forest soil and the formation of productivity of winter wheat. It was found that in a five-saw field crop rotation, the formation of ground backgrounds with different physical and chemical properties is observed. The application of bedding manure at a dose of 60 t on ha and against the background of moderate fertilization rates (N50-100P30-60K50-100) contributed to the neutralization of the soil solution to values of slightly acidic reaction (pH – 5,1), while in the absence of manure (mineral system fertilizers) pHcontinued to remain within the acidic reaction. The organic-mineral fertilization system (12 t on ha of manure + N100P60K100) and organic (12 t on ha of manure per 1 ha) turned out to be effective in terms of the humus of the soil regime, in accordance with the total humus content was 1,30 % and 1,32 % which in percentage terms is 18 % and 20 % higher compared to the option without fertilization – 1,10 %. Optimization of the parameters of the nutrient regime (mobile forms of phosphorus and potassium) of the soil at the end of the rotation was provided by the organo-mineral fertilization system (N100P60 K100 against the background of 60 t on ha of manure). A clear tendency to an increase (by 27 mg on kg) of the content of mobile potassium was determined, compensating for its constant deficiency in the soil, and by an increase of 38 % in mobile phosphorus. The highest productivity of winter wheat (5,45 t on ha) was provided by the organo-mineral fertilization system (60 t on ha of manure + N100P60K100), which is 78 % higher than the control (without fertilizers), under these conditions the greatest increase in protein was obtained – 0,63 t on ha.