MA Hongyu,LI Baoguo,CAI Bin,et al.Effect of Soil Cover on Soil Wind Erosion in Arid and Semi-arid Regions[J].Research of Soil and Water Conservation,2023,30(02):29-35.[doi:10.13869/j.cnki.rswc.2023.02.039]
干旱半干旱区地表覆盖对土壤风蚀的影响
- Title:
- Effect of Soil Cover on Soil Wind Erosion in Arid and Semi-arid Regions
- 文章编号:
- 1005-3409(2023)02-0029-07
- Keywords:
- wind erosion; soil cover; META; arid and semi-arid regions
- 分类号:
- S157
- 文献标志码:
- A
- 摘要:
- 为了探究地表覆盖对干旱半干旱地区土壤侵蚀及表层特性的影响,探寻农业发展的新机遇,使用Meta分析的方法,通过搜集国内外干旱半干旱地区土壤覆盖已发表的研究数据,分析了3种地表覆盖方式:覆盖植物、秸秆覆盖和高留茬对土壤风蚀模数及表层干容重、含水量和有机碳含量的影响。结果表明:(1)地表覆盖使土壤年风蚀量降低77.96%,地表风蚀量与覆盖度密切相关,秸秆覆盖度最高,减轻风蚀效果最佳。(2)地表覆盖平均降低2.94%表层(0—20 cm)土壤干容重,从而提高孔隙度保水保肥,抑制土壤侵蚀; 其中覆盖植物效果最好,能够降低5.26%。(3)地表覆盖能够增加6.26%年均表层土壤含水量,从而有效增大土壤颗粒间的黏聚力; 在降水量≤450 mm的半干旱地区该值能达到10.62%。(4)地表覆盖能够提高23.54%表层土壤有机碳含量,增加土壤颗粒间的黏结性,从而提高土体的抗风蚀能力; 高留茬的提升效果最好,为34.42%; 覆盖植物中豆科作物的效果最好,平均提高30.76%。总之,3种地表覆盖措施均能不同程度地减轻风蚀,能够实现保土、保水和固碳的多重收益,是未来双碳背景下实现农业可持续发展的有效解决方案。
- Abstract:
- In order to investigate the effects of soil cover on soil erosion and topsoil characteristics in arid and semi-arid regions, and to explore new opportunities for agricultural development, published data on soil cover in arid and semi-arid regions at home and abroad were collected and meta-analysis was used to analyze the effects of different mulching practices, like cover crops, straw mulching and stubble remaining, on wind erosion module, soil volume weight, soil water content and soil organic carbon. The results show that:(1)soil mulching can reduce annual wind erosion by about 77.96%; the wind erosion module is closely related to coverage and straw mulching has the highest coverage so it has the best effect on reducing wind erosion;(2)soil mulching can reduce surface(0—20 cm)soil volume weight by around 2.94% to ensure enough pore in soil to keep water and fertilizer, and inhibit soil erosion, among which cover crops work best by 5.26%;(3)soil mulching can increase topsoil water content by around 6.26%, thereby effectively increasing the cohesion between soil particles; in the area with low annual rainfall(≤450 mm). Soil mulching can effectively increase topsoil water content by 10.62%;(4)soil mulching can increase topsoil organic carbon content by 23.54%, thereby cementing soil particles together and improving the soil's resistance to wind erosion; stubble remaining has the best effect, increases organic carbon content by 34.42%; and in cover crops, legume crops have the best effect, increase organic carbon content by 30.76% on average. Overall, the three mulching methods can reduce wind erosion to varying degrees, protect soil and water, and fix carbon, which will be the effective solution to achieve sustainable agricultural development under the background of double-carbon in the future.
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备注/Memo
收稿日期:2021-12-17 修回日期:2022-01-14
资助项目:大自然保护协会TNC-先正达“中国干旱与半干旱区可持续农业示范项目”(P118870); 大自然保护协会TNC-先正达农业可持续发展基金会(SFSA)“中国土壤健康和资源利用效率政策研究”(P120101)
第一作者:麻虹宇(2000—),女(满族),内蒙古赤峰人,在读本科生,研究方向为自然地理与资源环境。E-mail:ma_hongyu@bjfu.edu.cn
通信作者:张丹(1987—),女,山东青岛人,博士,主要从事农业可持续发展研究。E-mail:zhangdan8720@163.com