Visnyk LNAU: Agronomy 2019 №23: 229-233
The effect of stubble biodestructor on the nutritive regime of the soil
Panfilova A., Candidate of Agricultural Science
ORCID ID: 0000-0003-0006-4090
Gamayunova V., Doctor of Agricultural Sciences
ORCID ID: 0000-0002-4151-0299
Mykolaiv National Agrarian University
https://doi.org/10.31734/agronomy2019.01.229
Annotation
The article presents the results of researches on the effect of treatment of crop residues of spring barley and peas by stubble Biodestructor (PE "BTU-center", Ukraine) on the content of nutrients in the soil. Researches were carried out during 2011–2015 yrs on the experimental field of the Mykolaiv National Agrarian University. The soil of experimental plots was represented by southern residual light-salinized light-loamed chernozemon the loesses. Studies found that, on average, over the years of research, before the processing of crop residues of spring barley and peas, the nitrate content in the soil layer 0–30 cm ranged from 7,9 up to 9,8 mg/kg of soil, mobile phosphorus ranged from 49,5 up to 50,3 mg/kg of soil, and exchangeable potassium ranged from 214 up to 254, mg/kg of soil. On average, over the years of research, after harvesting peas, compared with spring barley, the nitrates in the soil remained larger by 1,9 mg/kg of soil or 19,4 %, the mobile phosphorus the 0,8 mg/kg of soil or 1,6 %, theexchangeable potassium in the soil remained larger by40 mg/kg of soil or 15,7 %.
According to the treatment of crop residues of spring barley and peas by stubble Biodestructor together with N30, the content of mobile macronutrients in the soil increased significantly. Thus, on average for precursor crops, the studied factor provided an increase in the content of nitrates in the soil by 4,3 mg/kg of soil or 32,6 %, the content of mobile phosphorus in the soil by 7,7 mg/kg of soil or 13,4 %, and the content of exchangeable potassium in the soil by 36,0 mg/kg of soil or 13,3 % compared with the initial values (before the treatment of crop residues).
The varieties composition of the precurs or cultures also affected on the content of nutrients in the studied soill a yers. So, on average, over the years of research, three months after the treatment of crop residues of spring barley by stubble Biodestructor the nitrates in the soil were accumulated 12,6 mg/kg of soil, the mobile phosphorus in the soil was accumulated 53,8 mg/kg of soil and the exchangeable potassium in the soil was accumulated 253,0 mg/kg of soil, and after peas the content of mobile NPK in the soil increased by 8,7, 12,2 and 11,8 %, respectively. The same trend was observed in the variants of natural decomposition of crop residues without the use of Biodestructor stubble and nitrogen fertilizer.
Key words
stubble Biodestructor, crop residues of peas and spring barley, the content of nutrients in the soil, mobile forms of nitrogen, phosphorus and potassium
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