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首页> 外文期刊>Ecological research >Soil erodibility, microbial biomass, and physical-chemical property changes during long-term natural vegetation restoration: a case study in the Loess Plateau, China
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Soil erodibility, microbial biomass, and physical-chemical property changes during long-term natural vegetation restoration: a case study in the Loess Plateau, China

机译：长期自然植被恢复过程中土壤的侵蚀性，微生物量和理化性质的变化：以黄土高原为例

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摘要

Soil erodibility (K factor) is an important index for measuring soil susceptibility to water erosion, and an essential parameter that is needed for the prediction of soil erosion. Field investigation and laboratory analysis were conducted to study the changes of soil characteristics during long-term vegetation restoration in the hilly gullied loess area. The soil erodibility K values were calculated using the EPIC model and the physico-chemical properties as well as microbial characteristics were evaluated along a chronosequence of natural vegetation recovery (0-50 years) in abandoned land in the Zhifanggou Watershed of Ansai County, northwestern Shaanxi Province, China. The results showed that natural vegetation recovery following abandonment resulted in improvement of the soil properties and structure and these improving effects were closely related to the date of abandonment. Specifically, the K value of the surface layer (0-20 cm) was significantly reduced with time, while the total organic carbon, total nitrogen and soil microbial biomass C, microbial N and microbial P and the water-stable aggregate increased quickly. During the first 10 years of abandonment, these changes occurred relatively quickly due to a significant increase in soil organic matter, after which they gradually fluctuated for approximately 20 years, reaching their uttermost or minimum levels finally. However, these values differed greatly under Platycladus orientalis forest, whichrnsuggests that soil rehabilitation is a long-term task that requires several generations to complete.
机译：土壤侵蚀性（K因子）是衡量土壤对水蚀敏感性的重要指标，并且是预测土壤侵蚀所需的基本参数。通过野外调查和实验室分析，研究了黄土丘陵沟壑区长期植被恢复过程中土壤特征的变化。利用EPIC模型计算土壤可蚀性K值，并按照陕西西北安塞县纸坊沟流域荒地中天然植被恢复（0-50年）的时间序列，评价其理化性质和微生物特征中国的省。结果表明，废弃后自然植被的恢复导致土壤性质和结构的改善，这些改善效果与废弃日期密切相关。具体而言，表层（0-20 cm）的K值随时间显着降低，而总有机碳，总氮和土壤微生物量C，微生物N和微生物P以及水稳性团聚体迅速增加。在废弃的头十年中，由于土壤有机质的显着增加，这些变化发生得相对较快，此后它们逐渐波动了约20年，最终达到了其最大或最小水平。但是，在侧柏森林中，这些价值差异很大，这表明土壤修复是一项长期的任务，需要几代人的时间才能完成。

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  • 来源
    《Ecological research》 |2010年第3期|P.531-541|共11页
  • 作者

    Bingbing Zhu; Zhanbin Li; Peng Li; Guobin Liu; Sha Xue;

  • 作者单位

    Key Laboratory of Northwest Water Resources and Environment Ecology of MOE, Xi'an University of Technology, 710048 Xi'an, Shaanxi, China;

    rnKey Laboratory of Northwest Water Resources and Environment Ecology of MOE, Xi'an University of Technology, 710048 Xi'an, Shaanxi, China The State key Laboratory of Loess Plateau and Dry Land Farming, 712100 Yangling, Shaanxi, China;

    rnKey Laboratory of Northwest Water Resources and Environment Ecology of MOE, Xi'an University of Technology, 710048 Xi'an, Shaanxi, China;

    rnThe State key Laboratory of Loess Plateau and Dry Land Farming, 712100 Yangling, Shaanxi, China;

    rnKey Laboratory of Northwest Water Resources and Environment Ecology of MOE, Xi'an University of Technology, 710048 Xi'an, Shaanxi, China The State key Laboratory of Loess Plateau and Dry Land Farming, 712100 Yangling, Shaanxi, China;

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  • 正文语种 eng
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  • 关键词

    soil erodibility; soil microbial biomass; physicochemical properties; vegetation restoration; loess plateau;

    机译：土壤易蚀性土壤微生物量理化性质;植被恢复;黄土高原;

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