成土母质和利用方式对典型红壤抗蚀性的影响???
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1.中国地质调查局长沙自然资源综合调查中心;2.中国科学院亚热带农业生态研究所桃源农业生态试验站;3.中国科学院亚热带农业生态研究所长沙农业环境观测研究站;4.湖南省常德市桃源县水利局

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S157.1

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Effects of parent materials and land use types on anti-erodibility of typical red soils
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    摘要:

    [目的] 土壤抗蚀性是表征土壤抵抗侵蚀能力的重要参数,开展红壤抗蚀性研究可为红壤区水土流失防治和红壤资源合理开发利用提供重要基础数据和参考依据。[方法] 本文以湖南省沩水流域的典型红壤为研究对象,选取了第四纪红黏土、砂岩、板页岩和花岗岩风化物等4种典型成土母质发育的旱地、稻田、园地和林地共16个类型组合的红壤,研究了不同成土母质和土地利用方式下的红壤抗蚀性差异特征。[结果] 土地利用方式显著(P < 0.05)影响红壤抗蚀性,稻田、园地和林地土壤的抗蚀性和水稳性指数均显著(P < 0.05)高于旱地。不同成土母质发育的红壤抗蚀性无显著(P > 0.05)差异,且其与土地利用方式的交互作用对抗蚀性的影响不明显。土地利用方式显著(P < 0.05)改变了>0.25 mm水稳性团聚体(WSA0.25)和有机质含量,林地土壤WSA0.25含量显著(P < 0.05)高于旱地,稻田土壤有机质含量显著(P < 0.05)高于旱地、园地和林地。成土母质对WSA0.25含量的影响不显著(P > 0.05),但显著(P < 0.05)改变了红壤有机质和黏粒含量,花岗岩风化物发育的红壤有机质和黏粒含量均显著(P < 0.05)低于其它成土母质发育的红壤。相关性分析显示红壤抗蚀性和水稳性指数均与WSA0.25和有机质含量呈显著(P < 0.05)正相关关系,而与黏粒含量无显著(P > 0.05)相关性。[结论] 土地利用方式和成土母质可通过改变WSA0.25和有机质含量影响红壤抗蚀性能,但土地利用方式对红壤抗蚀性的影响强于成土母质,应在红壤水土流失防治过程中以土地利用方式调整和布局优化为主,兼顾成土母质类型。

    Abstract:

    [Objective] Soil anti-erodibility is an important parameter to characterize the ability of soil to resist erosion. The study of anti-erodibility on red soil can provide important basic data and reference for the prevention and control of soil erosion in red soil region and the rational development and utilization of red soil resources. [Methods] In this manuscript, the typical red soil in Weishui River Basin of Hunan Province was taken as the research object. A total of 16 types of red soil, including dry land, paddy field, garden land, and forestland, which were derived from four typical soil parent materials, such as Quaternary red clay, sandstone, plate shale, and granite, were selected to study the differences in anti-erodibility of red soils with different parent materials and land use types. [Results] Land use types significantly (P < 0.05) affected red soil anti-erodibility, the anti-erodibility and water stability indexes of paddy field, garden land, and forestland were significantly (P < 0.05) higher than those of dry land. There was no significant (P > 0.05) difference in the anti-erodibility of red soil derived from different parent materials, and the interaction between them and land use types on anti-erodibility was not obvious. In addition, land use types also significantly (P < 0.05) changed the contents of water-stable aggregate (WSA0.25) and soil organic matter, WSA0.25 of forest land was significantly (P < 0.05) higher than that that of dry land, and the soil organic matter content in paddy soil was significantly (P < 0.05) higher than that that of dry land, garden land, and forestland. However, the effect of parent materials on WSA0.25 was not significantly (P > 0.05), while significantly (P < 0.05) changed the contents of organic matter and clay in red soil, which were significantly (P < 0.05) lower in soil derived from granite than that derived from the other three parent materials. Correlation analysis showed that the anti-erodibility and water-stable indexes were significantly (P < 0.05) correlated with WSA0.25 and soil organic matter. [Conclusion] Both land use types and parent materials can affect the anti-erodibility of red soil by changing WSA0.25 and soil organic matter, but the effect of land use types on anti-erodibility was significantly stronger than that of parent material. Therefore, it should be based on the optimization of adjustment and layout about land use types for the prevention and control of soil and water loss in red soil, taking into account soil parent materials.

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  • 收稿日期:2024-10-25
  • 最后修改日期:2025-01-04
  • 录用日期:2025-01-06
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