Influence of systematic fertilizer on soil fertility for corn growing on grain
DOI:
https://doi.org/10.31548/agr2021.03.076Keywords:
content, nitrogen, phosphorus, potassium, soil fertility, fertilizer system, yield, protein collectionAbstract
The article presents the results of research on the systematic application of organic and mineral fertilizers as the indicators of fertility of gray forest soil and the formation of corn yield per grain. It was determined that in the five-field field crop rotation during the cultivation of the crop, soil backgrounds with different physical and chemical properties were formed. Application of litter manure (direct action) at a dose of 60 t / ha on the background of moderate rates of fertilizers (N40-80R30-60K40-80) contributed to the neutralization of the soil solution to the values of slightly acidic reaction (pH sol. - 5.2-5.3 units), whereas in the absence of manure (mineral fertilizer system) the pH of the salt remained within the medium acid reaction.
The most effective in terms of humus condition of the soil was the organo-mineral fertilizer system (12 t / ha of manure + N80P60K80) and organic (12 t / ha of manure per 1 ha of crop rotation area), respectively, the content of total humus was - 1.35 and 1.37% or in percentage terms by 25-27% higher compared to the control (without fertilizers) - 1.08 t / ha.
Optimization of nutrient regime (hydrolyzed nitrogen, mobile forms of phosphorus and potassium) of the soil at the end of rotation was provided by the organo-mineral fertilizer system (N100P60K100 against the background of 60 t / ha of manure).
The highest productivity of corn for grain (9.49 t / ha) was provided by the organo-mineral fertilizer system (60 t / ha of manure + N100P60K100), which is 86% higher than the control (without fertilizers), under these conditions the largest collection of crude protein was obtained – 0, 98 t / ha.
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