Effect of tillage systems on changes in the aggregate composition of dark gray forest soils in the Northern Trans-Urals
https://doi.org/10.26898/0370-8799-2023-2-1
Abstract
In a long-term stationary experiment (1988-2019) the impact of mouldboard, non-mouldboard, combined, differentiated, surface and sweep-blade tillage systems on the change in the aggregate composition of dark gray forest soils was studied. The research took place in the northern foreststeppe of the Northern Trans-Ural (Tyumen Region). Over a 30-year period of use in arable land, the soil of 0-20 cm layer retained its structural condition not inferior to the initial one for most of the studied variants of cultivation. With increasing the depth of the soil profile up to 0-30 cm layer due to an increase in the proportion of clumpy fraction in the lower layer 10-30 cm there was a decrease in the content of agronomically valuable structure compared to the layer 0-20 cm, as well as with the initial state on most of the studied systems of cultivation. The highest content of agronomically valuable structure in the soil layer 0-20 cm was on the mouldboard, sweep-blade and differentiated tillage systems (72.8-77.8%). Over the 30-year period, the agronomically valuable structure content (10-0.25 mm) in the soil layer 0-20 cm increased by 6.12-13.45% in these treatments, the structure coefficient by 21.9-60.3%. For the other treatment systems, the content of this fraction (67.5-69.8%) and the structure coefficient (2.07-2.31) were close to the initial condition - 68.6% and 2.19, respectively. The average weighted diameter of agronomically valuable aggregates increased from 2.71 mm in the initial condition to 3.00-3.29 mm (7.7-21.2%) due to a significant increase in the proportion of these aggregates in the 0-10 cm layer. In general, the highest indicators of the structural condition of the soil profile of 0-30 cm remained on the mouldboard, sweep-blade and differentiated systems of cultivation. Non-mouldboard, combined and surface tillage reduced the content of agronomically valuable structure by 9.7-15.9% compared with the mouldboard system, and led to a decrease in the coefficient of structure by 0.99-1.39 units.
Keywords
Supporting agencies: The work was performed in accordance with the research program under the state assignment No. 121041600037-3.
About the Authors
N. V. Perfilyev
Scientific Research Institute of Agriculture for Northern Trans-Ural Region - Branch of Tyumen Scientific Centre of Siberian Branch of the Russian Academy of Sciences
Russian Federation
Russian Federation
Nikolay V. Perfilyev, Doctor of Science in Agriculture, Head Researcher
625501, Tyumen, Moskovskiy vil., Burlaki St., 2
O. A. Vyushina
Scientific Research Institute of Agriculture for Northern Trans-Ural Region - Branch of Tyumen Scientific Centre of Siberian Branch of the Russian Academy of Sciences
Russian Federation
Russian Federation
Olga A. Vyushina, Researcher
Tyumen
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Review
For citations:
Perfilyev N.V., Vyushina O.A. Effect of tillage systems on changes in the aggregate composition of dark gray forest soils in the Northern Trans-Urals. Siberian Herald of Agricultural Science. 2023;53(2):5-15. (In Russ.) https://doi.org/10.26898/0370-8799-2023-2-1
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