侵蚀红壤恢复区植被垂直结构对土壤恢复特征的影响
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国家重点基础研究发展计划“973”项目(2010CB950702)和中国科学院战略性先导科技专项(XDA05050507)资助


Effect of Vertical Vegetation Structure on Soil Restoration Characteristic in Eroded Red Soil Region of Southern China
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    摘要:

    通过获取典型的侵蚀红壤恢复区植被垂直结构参数及林下土壤属性值,构建归一化土壤恢复指数,研究了植被垂直结构对林下侵蚀土壤恢复特征的影响。结果显示:研究区植被垂直结构与土壤属性特征较侵蚀期均有所恢复,植被垂直结构对侵蚀土壤的恢复影响显著,土壤重组有机碳、全氮和黏粒含量的恢复水平均呈现出纯林<林草<林灌草的趋势,体积质量顺序相应为林灌草<林草<纯林。植被投影叶面积指数与归一化土壤恢复指数呈显著正相关(r = 0.332*,P < 0.05)。在投影叶面积指数大于 0.2 的情形下,土壤恢复特征随植被垂直层次的增多呈正向演变,不同植被结构投影叶面积指数的增大有利于侵蚀区退化土壤质量的恢复,灌草层是侵蚀红壤恢复的重要影响因素。

    Abstract:

    The effect of vertical vegetation structure (VVS) on normalized soil restoration index (NSRI) was studied in the eroded red soil areas of southern China, by obtaining the vegetation projected leaf area index (PLAI) and soil properties of 56 samples. The results showed the VVS and soil quality both well restored, the effect of VVS on the physicochemical properties of the eroded soil was remarkable. The restoration of heavy fraction organic carbon, total Nitrogen and clay content rank of different VVS was in order of pure forest < forest and grass < forest, shrub and grass, while the rank of bulk density was opposite. In the situation where PLAI > 0.2, soil properties improved with PLAI increased. The NSRI correlated significantly with PLAI (r = 0.332*, P<0.05). In general, the increase of vegetation layers was conducive to the improvement of soil restoration degrees in southern China, the shrub and grass vegetation was crucial to the restoration of the eroded red soil.

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张海东,于东升,董林林,史学正,王 宁.侵蚀红壤恢复区植被垂直结构对土壤恢复特征的影响[J].土壤,2014,46(6):1142-1148. ZHANG Hai-dong, YU Dong-sheng, DONG Lin-lin, SHI Xue-zheng, WANG Ning. Effect of Vertical Vegetation Structure on Soil Restoration Characteristic in Eroded Red Soil Region of Southern China[J]. Soils,2014,46(6):1142-1148

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  • 在线发布日期: 2015-01-20
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