陕北农牧交错带土地荒漠化本质特性研究
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*国家自然科学基金资助项目(49971005;30190790)


STUDY ON THE CHARACTERISTIC OF LAND DESERTIFICATION IN THE AGRICULTURE AND ANI MAL HUSBANDRY INTERLACE ZONE OF NORTHERN SHAANXI
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    摘要:

    通过分析陕北农牧交错带土壤的机械组成、物质成分和理化性质,探讨了土地荒漠化的本质.结果表明:土壤受风沙作用,细粒物质逐渐减少,表层消失,或者被流沙取代,原土壤剖面被覆盖在沙层之下;土壤质地出现沙化,颗粒组成变粗;土壤有机质及养分含量减少,保水保肥性能降低;土壤形成以现代侵蚀和风沙沉积为主,物质淋溶和化学风化微弱,进化与退化同时共存.

    Abstract:

    Soil mechanical composition,physical features,chemical properties,and total composition of chemical elements of soils are measured for studying the land desertification.The results indicate that fine soil grains decrease progressively by wind and water erosion.Surface layer of soil vanished and it is covered with the sand layer.Soil texture tends sandification,and the contents of organic matter and nutrients reduce progressively.Ability in preserving moisture and fert ility fall down.Soil formation is in the stage of modern erosion and sand deposition,leaching and weathering are weak.The evolution coexists with the degeneration in the development of land resources.

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常庆瑞,安韶山,刘京,文治国.陕北农牧交错带土地荒漠化本质特性研究[J].土壤学报,2003,40(4):518-523. DOI:10.11766/trxb200108140406 Chang Qing-rui, An Shao-shan, Liu Jing, Wen Zhi-guo. STUDY ON THE CHARACTERISTIC OF LAND DESERTIFICATION IN THE AGRICULTURE AND ANI MAL HUSBANDRY INTERLACE ZONE OF NORTHERN SHAANXI[J]. Acta Pedologica Sinica,2003,40(4):518-523.

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  • 收稿日期:2001-08-14
  • 最后修改日期:2001-12-29
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  • 在线发布日期: 2013-02-25
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