N.P. Masyutenko, G.P. Glazunov, A.V. Kuznetsov, M.N. Masyutenko
All-Russian Research Institute of Farming and Soil Protection from Erosion, ul. Karla Marksa, 70b, Kursk, 305021, Russian Federation
Summary. The system of indicators of agroecological evaluation of eroded chernozem soils was developed on the basis of the suggested algorithm and investigation results. The studies were carried out in 2011-2016 with the use of GIS-technologies on a typical plowland plot with the area of 18.8 ha on the watershed plateau and the slope of the northern exposure with the inclination of 6.3 degrees (the experimental field of the All-Russian Research Institute of Farming and Soil Protection from Erosion, Kursk region). Agrochemical, agrophysical and biological properties of chernozem soils were studied. Strong inverse relations were established between the degree of soil erosion and the content of labile humus substances (correlation coefficient is 0.98), the ratio of the carbon of labile humic acids to that of labile fulvic acids (correlation coefficient is 0.98), the content of alkali-hydrolyzed nitrogen (correlation coefficient is 0.95), the content of mobile phosphorus (correlation coefficient is 0.92), humus content (correlation coefficient is 0.86). Within the analyzed system “soil-plant” on the basis of information and logical analysis the strong and moderate relation (the coefficients of the efficiency of information transmission are from 0.33 to 0.09) of the indicators of humus state of the soil, closely connected to the degree of soil erosion, with the yield of barley and winter wheat was revealed. The decrease in humus supplies in the layer 0-50 cm in weakly eroded typical chernozem and in moderately eroded one by (13.5 ± 3.6) % and (41.8 ± 2.4) % in comparison with non-eroded soil was registered. The content and composition of labile humus substances in typical chernozem profile also depend on the degree of soil erosion. The ratio of the carbon of labile humic acids to that of labile fulvic acids changes towards the greater content of the latter with the increasing degree of soil erosion. The integral indicator of physical soil condition, i.e. hardness, also can be an indicator of agroecological evaluation of eroded soils in the layer 0-20 cm.
Keywords: chernozem soils, degree of soil erosion, agroecological evaluation, indicators, system, humus, labile humus substances, correlational analysis, information and logical analysis, GIS-technologies.
Author Details: N.P. Masyutenko, D.Sc. (Agr.), deputy director (e-mail: Этот адрес электронной почты защищён от спам-ботов. У вас должен быть включен JavaScript для просмотра.); G.P. Glazunov, Cand. Sc. (Agr.), head of laboratory; A.V. Kuznetsov, Cand. Sc. (Agr), senior research fellow; M.N. Masyutenko, Cand. Sc., senior research fellow.
For citation: Masyutenko N.P., Glazunov G.P., Kuznetsov A.V., Masyutenko M.N. System of Indicators of Agroecological Evaluation of Eroded Chernozem Soils. Dostizheniya nauki i tekhniki APK. 2016. V.30. No. 11. Pp. 7-11 (in Russ.).