Published in Scientific Papers. Series A. Agronomy, Vol. LXV, Issue 1
Written by Nikolay CHEKAEV, Yulia BLINOKHVATOVA, Sergey NOVICHKOV
As a result of field experiments on the experimental field of Penza State Agrarian University (Russia, Penza region, Mokshansky district), it was revealed that with the annual introduction of different doses of litter turkey manure, an increase in the content of alkaline hydrolysable nitrogen in the soil is observed, although by the end of the growing season its content decreases, which associated with the consumption of its mineral compounds by crops. Manure doses from 12 to 36 t/ha increased the content of alkaline hydrolysable nitrogen in the soil from 26.6-29.9 mg/kg at a dose of 12 t/ha to 40.0-53.9 mg/kg of soil at a dose of 36 t/ha. With the annual use of manure, a gradual increase in the content of nitrate nitrogen in the soil is observed. By the end of the growing season, its content in the soil decreased according to the variants, although its content at doses of 24 and 36 t/ha was characterized by high and very high. This indicates that that at high doses of manure, nitrate nitrogen is not completely absorbed by crops and its amount is excessive. With an increase in the dose of semi-rotted manure more than 12 t/ha with a high content of ammonia nitrogen compounds, its increase is observed at the beginning of the growing season, which can affect the formation of the yield of cultivated crops.
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