Content of hydrolysable nitrogen in the soils of wet mixed broadleaved forest conditions of aviary keeping of hunting animals on the territories of sanctuaries of Western and Central Polissya

Abstract

Semi-free maintenance of animals has a considerable impact on an agroecological condition of the soil. The content of hydrolysable nitrogen by Kornfild method (DSTU 7863:2015) in soils of wet mixed broadleaved forest conditions on the territories of sanctuaries of Western and Central Polissya is analyzed in the article. The increase of an indicator on feeding grounds in comparison with control ground was fixed. Thus, the content of hydrolysable nitrogen in soil samples which were taken in sanctuaries of Rys HFC LLC, UTMR LLC (Central Polissya) and Sarnenske HF LLC (Western Polissya) was significantly higher than samples which were selected on the control grounds — for 35.9, 29.5 and 22.3%, respectively. On the other hand on the territories of sanctuaries of Sokil HPF LLC, Bilotserkivske Forestry SOE, Horodnytskey Forestry SOE and Korostyshivskey Forestry SOE the difference between samples in the content of hydrolysable nitrogen was 14.3–17.4%. However, in the inspected sanctuaries the content of hydrolysable nitrogen was low (106.74±18.78 mg/kg, n=16) and was characterized by the considerable level of feature variation — the coefficient of variation was 35.9%. Different levels of accumulation of hydrolysable nitrogen, according to us, are caused by intensity and duration of the use of sanctuaries. During the period of observations the accurate dependence is shown (r=0.84; R2 =0.70) between duration of functioning of sanctuaries and the content of hydrolysable nitrogen in a layer of 0–20 cm. The conducted researches can form a basis for prediction of these key nutrient stocks for forest cenoses on the territories of sanctuaries in different forest site conditions of Western and Central Polissya