基于3种不同土壤粒径分级制度的毛乌素沙地樟子松林地土壤体积分形维数差异研究

发布时间：2018-05-08 16:45

本文选题：粒径分级 + 沙地樟子松　；参考：《西北林学院学报》2017年03期

【摘要】：基于中国制、美国制和国际制3种不同土壤粒级分级方法对沙地樟子松林地土壤体积分形维数进行计算,以揭示不同粒径分级制度对樟子松林下土壤体积分形维数测定的影响,并探讨各粒径分级制度内在的联系。粒径组成及土壤体积分形维数分析、计算采用激光衍射技术方法进行测定。结果表明,1)樟子松林地土壤颗粒组成以砂粒为主,占总体积的75%左右、粉粒其次,占总体积的15%左右、粘粒含量相对较少,占总体积的3%左右;2)土壤体积分形维数排序为中国制(D_(CHN))国际制(D_(INT))美国制(D_(US));3)D_(CHN)、D_(INT)和D_(US)与土壤粘粒和砂粒含量呈显著相关(P0.05),但是与土壤粉粒含量相关性较差(P0.05);4)D_(CHN)、D_(INT)和D_(US)之间呈极显著正相关关系P0.01),且线性回归方程可实现三者之间的转化。综合分析3种土壤粒级分级方法均能有效反映土壤颗粒分布信息,且相较于D_(CHN)和D_(INT),D_(US)与土壤颗粒含量的相关性较好,粒径范围较宽阔,D值差异较大,实用性较好,是计算樟子松林地土壤体积分形维数的较优选择。
[Abstract]:The fractal dimension of soil volume of Pinus sylvestris var. mongolica forest in sandy land was calculated by three different grain-grading methods, made in China, USA and international, in order to reveal the influence of different particle size classification systems on the measurement of fractal dimension of soil volume under Pinus sylvestris var. mongolica forest. The internal relation of each particle size classification system is also discussed. The particle size composition and the fractal dimension of soil volume were analyzed. The results showed that the soil particle composition of Pinus sylvestris var. mongolica forest was mainly composed of sand, which accounted for about 75% of the total volume, followed by silt, about 15% of the total volume, and the clay content was relatively less. (about 3% of the total volume) the order of fractal dimension of soil volume is made in China (DX / CHN / N) International DINT (D / T / T) DUST / D / D / T / T / D / T / D / T / D / T / D / S / D / S / D / S / D / S / D / S / D / S / D / S / D / S / D / S / D / S / D / S / D / S / D / S / D / S / D / S / D / S / D / S / D / S / D / S / D / S / D / S / D / S / D / S / D / S / D / S / D / S / D / S / D / S / D / S / D / S / D / S / S / The linear regression equation can realize the transformation of the three. The comprehensive analysis of three soil grain-gradation methods can effectively reflect the information of soil particle distribution, and the correlation between soil particle content and soil particle content is better than that of DSP CHN and DSP / DUSS, and the difference of D value in particle size range is wider and the practicability is better. It is the best choice to calculate the fractal dimension of soil volume in Pinus sylvestris forest land.
【作者单位】：沈阳农业大学林学院;辽宁辽河平原森林生态系统定位研究站;北京林业大学水土保持学院;东京农业大学研究生院;
【基金】：国家林业行业科研专项(201404303-05) 国家自然科学基金(41450007) 林业公益性行业科研专项(201304216)
【分类号】：S714;S791.253

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