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当前位置: 首页 > 文章 > 植物篱-农作坡耕地土壤微团聚体组成及分形特征 土壤学报 2012,49 (6) 1069-1077
Position: Home > Articles > COMPOSITION AND FRACTAL FEATURES OF SOIL MICRO-AGGREGATES IN SLOPING FARMLAND WITH HEDGEROW Acta Pedologica Sinica 2012,49 (6) 1069-1077

植物篱-农作坡耕地土壤微团聚体组成及分形特征

作  者：
蒲玉琳;谢德体;林超文;丁恩俊;张坤;魏朝富
单  位：
四川省农业科学院土壤肥料研究所;西南大学资源环境学院
关键词：
植物篱;土壤微团聚体;分形特征;坡面分布
摘  要：
利用植物篱控制水土流失的长期定位实验,采用数理统计法研究了13 a期植物篱-农作坡耕地土壤微团聚体组成及分形特征。结果表明,与传统横坡农作模式相比,植物篱能明显增加<0.2 mm粒级土壤微团粒含量,尤其是0.2～0.05 mm粒级,提高了土壤微团聚体分形维数与团聚度,降低了坡耕地土壤小粒级微团聚体在下坡位的相对富集程度,优化了土壤大小粒级微团聚体的坡面分布。紫色丘陵区植物篱-农作模式下土壤微团聚体分形维数反映了坡耕地土壤的物理性质、养分肥力与抗蚀能力。
译  名：
COMPOSITION AND FRACTAL FEATURES OF SOIL MICRO-AGGREGATES IN SLOPING FARMLAND WITH HEDGEROW
作  者：
Pu Yulin1,2,3 Xie Deti1,3 Lin Chaowen4 Ding Enjun1,3 Zhang Kun1,3 Wei Chaofu1,3(1 College of Resources and Environment,Southwest University,Chongqing 400715,China)(2 College of Resources and Environment,Sichuan Agricultural University,Chengdu 611134,China)(3 Chongqing Engineering Research Center for Agricultural Non-point Source Pollution Control in the Three Gorges Reservoir Area, Chongqing 400715,China)(4 Soil and Fertilizer Institute,Sichuan Academy of Agricultural Sciences,Chengdu 610066,China)
关键词：
Hedgerows;Soil micro-aggregates;Fractal features;Slope distribution
摘  要：
Based on a long-term(13 a) experiment on effect of hedgerows controlling soil and water loss,composition and fractal features of soil micro-aggregates in slope farmlands with established hedgerows were studied with mathematical statistics.Results show that compared to the pattern of traditional contour cropping,the pattern of contour cropping plus hedgerows obviously increased the content of soil micro-aggregates,<0.2 mm in particle size,especially the fraction of 0.2~0.05 mm.Hedgerows significantly increased soil micro-aggregate fractal dimension(D) and aggregation degree,reduced relative enrichment of soil micro-aggregates small in particle size at lower slopes,and optimized slope distribution of soil large-and small-sized micro-aggregates.The soil micro-aggregate D values reflect soil physical properties,soil fertility,and erosion-resistance of slopelands under the pattern of contour cropping plus hedgerow in the purple hill region.

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