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首页> 外文期刊>Energy education science and technology >Research on soil erodibility under different land-use conditions in hilly area of purple soil
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Research on soil erodibility under different land-use conditions in hilly area of purple soil

机译：紫色土丘陵区不同土地利用条件下土壤侵蚀性研究

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摘要

The Erosion-productivity impact calculator (EPIC) model was used to estimate soil erodibility (K) in a small watershed where the main soil type is purple soil. Purple soil is a typical sandy loam soil in the Three Gorges reservoir area and most distributes in southwest China. The objectives of this paper were to explain the relationship between erodibility (K) and land-uses. Spatial variability characteristics of soil erodibility (K) under different land-uses (woodland - Pinus massoniana Lamb and Robinia pseudoacacia L, economic fruit forest - Citrus reticulata Banco, cropland - Zea mays L and Lpomoea batatas, waste-grassland) were studied. Results indicated that: (1) Soil texture and human activities were the main factors that influenced the soil erodibility (K), erodibility (K) increased with the content of sand while decreased with the content of silt, clay and organic matter. (2) The order of soil erodibility (K) from large to small under six land-uses in the watershed was: waste-grassland ＞ economic fruit forest (Citrus reticulata Banco) ＞ woodland (Pinus massoniana Lamb) ＞ woodland (Robinia pseudoacacia L) ＞ cropland (Lpomoea batatas) ＞ cropland (Zea mays L). (3) Soil erodibility (K) of the whole purple soil watershed area showed a positive trend with elevation of the watershed from east to west. Erodibility (K.) of woodland (Robinia pseudoacacia L) exhibited K_(upstream) ＜ K_(midstream) ＜ K_(downstream), however, the erodibility (K) under other land-use showed the opposite trend, manifesting in K_(upstream) ＞ K_(midstream) ＞ K_(downstream).
机译：侵蚀生产力影响计算器（EPIC）模型用于估算主要土壤类型为紫色土壤的小流域中的土壤侵蚀性（K）。紫色土是三峡库区典型的砂壤土，分布在中国西南地区。本文的目的是解释可蚀性（K）与土地利用之间的关系。研究了不同土地利用方式（林地-马尾松羊肉和刺槐），经济果林-柑桔银行，农田-玉米大麦和马铃薯，荒地的土壤侵蚀性（K）的空间变异特征。结果表明：（1）土壤质地和人类活动是影响土壤可蚀性（K）的主要因素，可蚀性（K）随含沙量的增加而增加，而随泥沙，黏土和有机质的增加而减小。 （2）在该流域的六种土地利用下，土壤侵蚀度（K）从大到小的顺序为：荒草地＞经济果林（Citrus reticulata Banco）＞林地（Pinus massoniana Lamb）＞林地（Robinia pseudoacacia L ）＞农田（Lpomoea batatas）＞农田（Zea mays L）。 （3）整个紫色土壤流域面积的土壤可蚀性（K）随着流域从东向西的升高呈正趋势。林地（Robinia pseudoacacia L）的可蚀性（K.）表现为K_（上游）＜K_（中游）＜K_（下游），但其他土地利用下的可蚀性（K）则呈现相反的趋势，表现为K_（上游） ）＞ K_（中游）＞ K_（下游）。

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  • 来源
    《Energy education science and technology》 |2013年第4期|1929-1938|共10页
  • 作者

    Yu Zhao; Min Gao; Xiaoyan Chen; Bin Mo;

  • 作者单位

    College of Resources and Environment, Southwest University/Key Laboratory of Eco-environments in Three Gorges Region (Ministry of Education), Beibei District Chongqing, 400700, China;

    Shaanxi Provincial Academy of Environmental Science, Xian 710061, China;

    College of Resources and Environment, Southwest University/Key Laboratory of Eco-environments in Three Gorges Region (Ministry of Education), Beibei District Chongqing, 400700, China;

    College of Resources and Environment, Southwest University/Key Laboratory of Eco-environments in Three Gorges Region (Ministry of Education), Beibei District Chongqing, 400700, China;

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  • 正文语种 eng
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  • 关键词

    Soil erodibility; Purple soil; EPIC model; Land-use condition;

    机译：土壤易蚀性;紫色土;EPIC模型;土地利用条件;

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