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    土壤大孔隙三维特征影响因素和测定方法研究进展

    Research progress in influencing factors and measuring methods of three-dimensional characteristics of soil macropores

    • 摘要: 土壤大孔隙是优先流的主要通道,对土壤水分、空气和化学物质及污染物的优先运移起着重要作用,土壤大孔隙三维形态特征的量化分析及影响因素研究是目前大孔隙的研究重点,研究成果可为理解土壤水分运动机理及评估地下水污染等提供科学支撑。本文从大孔隙三维形态特征参数的定义(大孔隙体积、表面积、长度、数量、迂曲度、倾斜角度、路径数量、孔径、节点、连接度、圆度等),各参数测定方法及软件(Avizo 9.0、VG Studio MAX 2.2、Arc/Info 10.0、ImageJ等),大孔隙特征影响因素(根系、土壤动物、干湿及冻融交替、人为因素等)3个方面,综合介绍了土壤大孔隙三维特征的研究现状及进展,并基于此预测了今后的研究趋势,以期为今后大孔隙三维特征的深入研究提供参考。

       

      Abstract: Macropore is the main channel for preferential flow, therefore it largely impacts the transportation of water, air, and chemical materials in soil. Recently, it has become a focus of interest for quantitative analysis and influencing factors of three-dimensional(3D) morphological characteristics of soil macropores, since it could provide fundamental explanations for water soil movement patterns and groundwater pollution assessment. This paper examines state-of-the-art research development regarding 3D morphological characteristics of soil macropore by revisiting the concept (macropore volume, surface area, length, number, tortuosity, inclination angle, path number, macropore diameter, node, connectivity, roundness, etc.), quantitative measurements and software (Avizo 9.0, VG Studio MAX 2.2, Arc/Info 10.0, Image J, etc.) and impact factors (root system, soil animal, alternation of dry wet and freeze-thaw, human factors, etc.) of soil macropore characteristics. On the basis of summarizing the current research status, this paper summarizes the relevant research conclusions, and also proposes the direction of future work by reviewing current work.

       

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