M. V. Rublyuk, D. A. Ivanov, O. V. Karaseva, N. A. Kharkhardinov
Federal Research Centre Dokuchaev Soil Science Institute, Pyzhevskii per., 7, str. 2b, Moskva, 119017, Russian Federation
Abstract. The purpose of the research was to study the influence of drained agricultural landscapes on the water-physical properties of sod-podzolic soil and the productivity of the legume-cereal grass mixture of the second year of use. The research was conducted in 2017–2019 at a test site in the Tver region. Agricultural microlandscapes covering the top, slopes (southern and northern), and interhill depressions of a finite moraine hill served as options of the experiment. The granulometric composition of the soils on the southern slope and the top was sandy loamy; the granulometric composition of the soils on the northern slope was light loamy. Soil density in the 0–20 cm layer varied by options and years of research. It was characterized by deviations from the values, average for the experiment, in the range of 0.01–0.03 g/cm3. The lower limit of soil density (1.21 g/cm3) was noted in the transit and eluvial-transit options on the southern slope. The total soil porosity changed insignificantly varying from 49.8% to 52.4%. Soil water permeability ranged from 0.47 mm/min to 1.30 mm/min. The upper water regime within the hill was characterized by a complex geological soil-landscape structure depending on weather conditions, characteristics of the micro-basin, and landscape diversity. On average, over 3 years, the closest to optimal conditions for the growth of legume-grass mixtures were formed in the eluvial-transit microlandscape on the northern exposure slope, where the highest yield increase (18.8%) was noted. The productivity of grasses largely depended on the year conditions. A close direct correlation was established between the yield of the grass mixture and the amount of precipitation during the growing season (r = 0.96). A weak inverse correlation dependence of yield was established between the porosity of aeration and soil permeability (r = -0.58 and r = -0.51, respectively).
Keywords: agrolandscape; agricultural microlandscape; slope; soil properties; water permeability; aeration porosity; density; legume-grass mixture.
Author Details: M. V. Rublyuk, Cand. Sc. (Agr.), senior research fellow (e-mail: Этот адрес электронной почты защищён от спам-ботов. У вас должен быть включен JavaScript для просмотра.); D. A. Ivanov, D. Sc. (Agr.), chief research fellow; O. V. Karaseva, Cand. Sc. (Agr.), senior research fellow; N. A. Kharkhardinov, post graduate student.
For citation: Rublyuk MV, Ivanov DA, Karaseva OV, et al. [Influence of landscape conditions on the properties of sod-podzolic soil and the productivity of clover-timothy grass mixture]. Dostizheniya nauki i tekhniki APK. 2020;34(10):85-90. Russian. doi: 10.24411/0235-2451-2020-11013.