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- Title
长期耕作对农田黑土团聚体和有机碳稳定性的影响.
- Authors
隋鹏祥; 罗 洋; 郑洪兵; 李瑞平; 王 浩; 袁 野; 郑金玉; 刘武仁
- Abstract
To analyze the effects of different tillage practices on plough layer soil structure and organic carbon stabilization in farmland black soil, we utilized a long-term positioning platform of different tillage practices in black soil, combined with the wet-sieving method and infrared spectroscopy method to investigate the impacts of conventional tillage (CT), no-tillage (NT), sub-soiling tillage (ST), and moldboard plowing tillage (MP) on soil aggregates distribution and organic carbon characteristics in 0-40 cm soil layers. Results showed that compared to CT, NT and ST treatments significantly increased the proportion of large macroaggregates (>2 mm) in the topsoil layer (0-20 cm), and promoted the proportion of small macroaggregates (0.25-2 mm) in the subsoil layer (20-40 cm) for NT, ST, and MP. Additionally, NT, ST, and MP treatments resulted in higher mean weight diameter (MWD) and mean geometric diameter (GMD) of soil aggregates in both the topsoil and subsoil layers. NT treatment improved soil body and large macroaggregates organic carbon content in the topsoil layer, while ST and MP enhanced soil body and large macroaggregates organic carbon content in the subsoil layer. The contribution rate of small macroaggregates organic carbon content was found to be between 68.9%-83.4% of the total organic carbon content. Furthermore, the organic carbon chemical stabilization of soil body and aggregates increased in the topsoil and subsoil layers under NT treatment compared to others. The MWD showed a positive correlation with the organic carbon content and chemical stability of soil body and small macroaggregates. These findings offered a theoretical basis for understanding the impact of various tillage practices on the stability of soil aggregate and organic carbon in black soil region.
- Subjects
PLOWING (Tillage); TILLAGE; SUBSOILS; CARBON-black; CARBON in soils; BLACK cotton soil
- Publication
Yingyong Shengtai Xuebao, 2023, Vol 34, Issue 7, p1853
- ISSN
1001-9332
- Publication type
Article
- DOI
10.13287/j.1001-9332.202307.027