Effects of straw return methods on soil aggregate stability in sloping farmland of black soil

Liu Zhengyu; Shi Yan; Li Runfang; Chen Jiaqi; Qiu Guangwei; Wang Huaipeng; Li Ming; Li Yumei

doi:10.13961/j.cnki.stbctb.2025.03.040

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Effects of straw return methods on soil aggregate stability in sloping farmland of black soil

Soil and Water Conservation Monitoring and Applied Technology

- Effects of straw return methods on soil aggregate stability in sloping farmland of black soil
- Bulletin of Soil and Water Conservation Vol. 45, Issue 3, Pages: 205-212(2025)
- 作者机构：
  
  1.黑龙江北大荒现代农业服务集团有限公司宝泉岭分公司，黑龙江佳木斯 154211
  2.北大荒农业股份有限公司绥滨分公司，黑龙江绥滨154213
  3.哈尔滨师范大学生命学院，黑龙江哈尔滨 150500
  4.黑龙江八一农垦大学农学院，黑龙江大庆 163000
  5.黑龙江省黑土;保护利用研究院，黑龙江哈尔滨 150086
  6.黑龙江省农业科学院克山分院，黑龙江克山 161600
- 作者简介：
- 基金信息：
- DOI：10.13961/j.cnki.stbctb.2025.03.040
  CLC： S157.4
- CSTR：32312.14.stbctb.2025.03.040.
- Received：13 January 2025，
  
  Revised：2025-03-03，
  
  Published：10 June 2025
- 稿件说明：
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刘峥宇, 时妍, 李润芳，等.黑土坡耕地秸秆还田方式对土壤团聚体稳定性的影响[J].水土保持通报,2025,45(3):205-212.

Liu Zhengyu, Shi Yan, Li Runfang, et al. Effects of straw return methods on soil aggregate stability in sloping farmland of black soil [J]. Bulletin of Soil and Water Conservation,2025,45(3):205-212.
刘峥宇, 时妍, 李润芳，等.黑土坡耕地秸秆还田方式对土壤团聚体稳定性的影响[J].水土保持通报,2025,45(3):205-212. DOI： 10.13961/j.cnki.stbctb.2025.03.040. CSTR： 32312.14.stbctb.2025.03.040..

Liu Zhengyu, Shi Yan, Li Runfang, et al. Effects of straw return methods on soil aggregate stability in sloping farmland of black soil [J]. Bulletin of Soil and Water Conservation,2025,45(3):205-212. DOI： 10.13961/j.cnki.stbctb.2025.03.040. CSTR： 32312.14.stbctb.2025.03.040..

摘要

目的

探讨秸秆还田方式对土壤结构性状及有机碳与团聚体稳定性之间的关系，为黑土区坡耕地实施合理侵蚀防控技术提供理论依据。

方法

模拟自然条件下土壤团聚体破碎机制，分析秸秆还田下团聚体稳定性的变化。

结果

不同秸秆还田方式下土壤团聚体稳定性的变化因破碎机制和还田方式而变化，快速湿润是黑土团聚体破碎最主要的机制。快速湿润与湿润震荡机制下<2 mm和2~5 mm团聚体平均重量直径（MWD）值差异显著，湿润震荡2~5 mm团聚体稳定性最高，表明黑土中大粒径团聚体稳定性较高，且大粒径团聚体稳定性与土壤有机碳呈正相关。湿润震荡<2 mm粒径团聚体与土壤容重和毛管孔隙呈显著正相关，与总孔隙度、非毛管孔隙呈显著负相关。

结论

短期内，秸秆覆盖处理因土壤容重和孔隙度等非生物因素可能掩盖秸秆覆盖地表对侵蚀防控的效果从而影响团聚体稳定性，而秸秆碎混还田土壤总孔隙度与非毛管孔隙度降低，团聚体稳定性有增强趋势。

Abstract

Objective

The effects of different straw return methods on soil structural properties and the relationship between organic carbon and aggregate stability were investigated， in order to provide a theoretical basis for implementing effective erosion control techniques on sloping farmlands in black soil regions.

Methods

Natural soil aggregate breakdown mechanisms were simulated to analyze changes in aggregate stability under straw return practices.

Results

The stability of soil aggregates varied depending on the breakdown mechanism and straw return method. Rapid wetting was identified as the primary mechanism for aggregate breakdown in black soil. Significant differences in mean weight diameter were observed for <2 mm and 2—5 mm aggregates under rapid wetting and wet shaking mechanisms. The 2—5 mm aggregates under wet shaking exhibited the highest stability， indicating that larger aggregates in black soil were more stable and positively correlated with soil organic carbon. For <2 mm aggregates under wet shaking， stability was significantly positively correlated with soil bulk density and capillary porosity but negatively correlated with total porosity and non-capillary porosity.

Conclusion

In the short term， straw mulching may obscure its erosion control effects due to abiotic factors such as soil bulk density and porosity， thereby influencing aggregate stability. In contrast， straw incorporation reduces the total porosity and non-capillary porosity while tending to enhance aggregate stability.

关键词

Keywords

references

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