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首页> 外文期刊>Agroforestry Systems >An analysis of soil fractal dimension in a sloping hedgerow agroforestry system in the Three Gorges Reservoir Area, China
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An analysis of soil fractal dimension in a sloping hedgerow agroforestry system in the Three Gorges Reservoir Area, China

机译：三峡库区坡篱农林复合系统土壤分形维数分析。

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摘要

Hedgerow intercropping provides an efficient method of controlling soil erosion and improving soil fertility on sloping agricultural land. Topsoil (0-20 cm soil layer) of 32 plots established in the Three Gorges Reservoir Area of the Yangtze River was sampled from the steep land between hedgerows (P1) and within hedgerows uphill (P2), under (P3) and downhill (P4) from the hedgerow were analyzed and the soil volumetric fractal dimension (DV) was calculated and the relationships between DV and soil physicochemical properties were tested. Results show that hedgerows effectively intercept clay particles in soil; the soil clay concentration within hedgerows was significantly higher (P 0.05) than that of the soil between hedgerows at P1, respectively. The soil DV varied significantly among different positions in hedgerow systems, the DV of soil within hedgerows at P2, P3 and P4 were significantly higher (P 0.05) than that of the soil between hedgerows at P1. DV was correlated positively and very significantly (P 0.01) with the soil clay concentration (R (2) = 0.93) and silt content (R (2) = 0.74), and the DV was significantly (P 0.01) and negatively correlated with soil sand content (R (2) = 0.78). The DV was significantly correlated with various soil physical properties and concentrations of soil nutrients. Therefore, the DV can be considered as a potential and accurate evaluating indicator for soil quality and nutrient conservation as they relate to the hedgerow intercropping on steep land.
机译：绿篱间作提供了一种有效的方法来控制土壤侵蚀并提高坡地农地的土壤肥力。在长江三峡水库地区建立的32个样地中的表土（0-20厘米土层）是从树篱（P1）之间，上坡（P2），下坡（P3）和下坡（P4）的树篱内的陡峭土地取样的从树篱中分析）并计算土壤体积分形维数（DV），并测试DV与土壤理化性质之间的关系。结果表明，树篱可以有效地拦截土壤中的粘土颗粒。在P1，树篱内的土壤黏土浓度分别显着高于（P <0.05）树篱间的土壤。树篱系统中不同位置的土壤DV差异显着，P2，P3和P4处树篱内的土壤DV显着高于P1树篱间土壤的DV（P <0.05）。 DV与土壤黏土浓度（R（2）= 0.93）和淤泥含量（R（2）= 0.74）呈正相关且极显着（P <0.01），与DV呈显着（P <0.01）和负相关。土壤含沙量（R（2）= 0.78）。 DV与各种土壤物理性质和土壤养分浓度显着相关。因此，DV与陡峭土地上的树篱间作有关，可被视为土壤质量和养分保护的潜在且准确的评估指标。

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