西南岩溶槽谷土壤团聚体稳定性和土壤抗侵蚀性对不同基岩地层倾角和土地利用类型的响应

IF 7.3 1区 农林科学 Q1 ENVIRONMENTAL SCIENCES
Fengling Gan , Hailong Shi , Junfei Gou , Linxing Zhang , Quanhou Dai , Youjin Yan
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引用次数: 0

摘要

土壤团粒稳定性是反映土壤质量和抗侵蚀能力的一个重要指标,对土壤过程和功能有很大影响。基岩地层倾角(倾角斜坡和反倾角斜坡)和土地利用类型是影响土壤团聚稳定性的主要因素,但在岩溶槽谷中的具体机制尚不清楚。因此,为了探讨基岩地层倾角和土地利用类型对岩溶槽谷土壤团聚稳定性的影响,研究人员从五种主要土地利用类型(废弃地、草地、辣椒地、玉米地和森林)的倾角和反倾角斜坡上采集了土壤。采用干、湿筛分分析法将土壤分为大团聚体和微团聚体。在传统实验室中测量了大团聚体和微团聚体的土壤粒度分布。结果表明,不同基岩地层倾角、坡度位置和土地利用类型的土壤团聚体稳定性存在显著差异(P < 0.05)。倾角斜坡花椒地的大集料和微集料的变化范围高于反倾角斜坡。比较所有土地利用类型,与倾角坡其他坡位相比,反倾角坡森林上坡水稳集料为 0.25 mm(85.31%),平均重径为 2.67 mm。此外,浸染坡的集料破坏率(35.57%)高于反浸染坡(29.81%),浸染/反浸染坡天然林的土壤侵蚀因子值显著低于其他土地利用类型(P <0.05)。当大团聚体含量较大时,土壤大团聚体重量较大。土壤团聚体的破坏率越低,土壤结构的稳定性就越好。总之,这些结果表明,天然林可以显著提高土壤团聚体的稳定性,从而提高土壤的抗侵蚀能力。因此,应在岩溶槽谷的倾斜/反倾斜斜坡上实施自然恢复措施。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

Responses of soil aggregate stability and soil erosion resistance to different bedrock strata dip and land use types in the karst trough valley of Southwest China

Responses of soil aggregate stability and soil erosion resistance to different bedrock strata dip and land use types in the karst trough valley of Southwest China

Soil aggregate stability is an important index that reflects soil quality and anti-erosion ability and strongly affects soil processes and functions. Bedrock strata dips (dip and anti-dip slopes) and land use types primarily influence soil aggregate stability, whereas the detailed mechanisms are unclear in karst trough valley. Therefore, to explore the effects of bedrock strata dip and land use type on soil aggregate stability in karst trough valleys, soils were collected from five major land use types (abandoned land, grassland, pepper fields, corn fields and forest) on dip and anti-dip slopes. The soil was fractionated into macroaggregates and microaggrates using dry and wet sieving analysis. The soil particle size distributions in the macroaggregates and microaggregates were measured in conventional laboratories. The results showed significant differences in soil aggregate stability among different bedrock strata dips, slope positions, and land use types (P < 0.05). The variation ranges of macroaggregates and microaggregates in the pepper fields of the dip slope were higher than those on the anti-dip slope. Comparing all land use types, the forest of the anti-dip slope had >0.25 mm water-stable aggregates (85.31%) and mean weight diameter (2.67 mm) on the upper slope compared to that in the other slope positions of the dip slope. In addition, the dip slope had a higher percentage of aggregate destruction (35.57%) than the anti-dip slope (29.81%), and the soil erodibility factor value of the natural forest of the dip/anti-dip slope was significantly lower than that of the other land use types (P < 0.05). When the content of large macroaggregates was larger, the soil macroaggregate weight was greater. When the failure rate of the soil aggregates was lower, the stability of the soil structure was better. Overall, these results suggest that natural forests can significantly improve the stability of soil aggregates, thereby improving soil erosion resistance. Therefore, natural recovery measures should be implemented on dip/anti-dip slopes of karst trough valleys.

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来源期刊
International Soil and Water Conservation Research
International Soil and Water Conservation Research Agricultural and Biological Sciences-Agronomy and Crop Science
CiteScore
12.00
自引率
3.10%
发文量
171
审稿时长
49 days
期刊介绍: The International Soil and Water Conservation Research (ISWCR), the official journal of World Association of Soil and Water Conservation (WASWAC) http://www.waswac.org, is a multidisciplinary journal of soil and water conservation research, practice, policy, and perspectives. It aims to disseminate new knowledge and promote the practice of soil and water conservation. The scope of International Soil and Water Conservation Research includes research, strategies, and technologies for prediction, prevention, and protection of soil and water resources. It deals with identification, characterization, and modeling; dynamic monitoring and evaluation; assessment and management of conservation practice and creation and implementation of quality standards. Examples of appropriate topical areas include (but are not limited to): • Conservation models, tools, and technologies • Conservation agricultural • Soil health resources, indicators, assessment, and management • Land degradation • Sustainable development • Soil erosion and its control • Soil erosion processes • Water resources assessment and management • Watershed management • Soil erosion models • Literature review on topics related soil and water conservation research
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