Influence of agricultural technologies on the morphological properties of chernozems
https://doi.org/10.19047/0136-1694-2020-102-125-142
Abstract
A comparative assessment of the morphological properties of typical and ordinary chernozems using traditional technology of field crops cultivation with soil treatment and no-till revealed trends in morphological properties changing over time and space. After using no-till on typical chernozems of the Kursk region for 4 years, there was a tendency to increase in humus horizons A and A + AB thickness and in the level of carbonate detection line (10% HCl reaction), which uprose closer to the soil surface. In ordinary chernozems of Stavropol after 7 years of using no-till, this trend is typical only of A + AB horizon. When plowing chernozems, there is a trend to deeper carbonate accumulation level. The gradual accumulation and decomposition of crop residues on the soil surface, which play an important role in wind erosion protection, and less intensive evaporation over time leads to an increase in the thickness of humus horizons and the content of organic matter. The results obtained are indicative of the initialization of morphological properties transformation in chernozems when no-till is used. The decrease in the thickness of the humus horizon on arable lands in Stavropol region results from deflation caused by both numerous soil treatments and a specific wind regime, and direct sowing has demonstrated positive results in the fight against wind erosion processes. When no-till technology is used, chernozems acquire natural features typical of them – variability of properties, i. e. the initial heterogeneity of soil cover, which determines the sustainability of soils in natural ecosystem.
Supporting agencies: The studies were carried out with the financial support of the Russian Science Foundation, project No. 19-16-00053, using the equipment of the Center for the collective use of scientific equipment “Functions and properties of soils and soil cover” of the V.V. Dokuchaev Soil Science Institute.
About the Authors
V. P. Belobrov
Federal Research Centre “V.V. Dokuchaev Soil Science Institute”
Russian Federation
7 Bld. 2 Pyzhevskiy per., Moscow 119017
Russian Federation
7 Bld. 2 Pyzhevskiy per., Moscow 119017
V. K. Dridiger
North Caucasus Federal agricultural research centre
Russian Federation
49 Nikonova Str., Mikhailovsk 356241
Russian Federation
49 Nikonova Str., Mikhailovsk 356241
S. A. Yudin
Federal Research Centre “V.V. Dokuchaev Soil Science Institute”
Russian Federation
Russian Federation
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Review
For citations:
Belobrov V.P., Dridiger V.K., Yudin S.A. Influence of agricultural technologies on the morphological properties of chernozems. Dokuchaev Soil Bulletin. 2020;(102):125-142. (In Russ.) https://doi.org/10.19047/0136-1694-2020-102-125-142
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