西双版纳橡胶林土壤颗粒体积分形维数特征

发布时间：2018-05-01 23:05

本文选题：橡胶林 + 不同林龄　；参考：《热带作物学报》2017年05期

【摘要】：土壤粒径分布影响土壤质地均匀程度和土壤肥力等,是重要的土壤物理特征之一。运用土壤颗粒体积分形维数模型计算了西双版纳不同林龄橡胶林土壤剖面各层(共计105个土壤样品)的分形维数D值。结果表明,分形维数D值介于2.636 2~2.885 0之间,分形维数与0.002 mm的黏粒体积百分含量呈极显著正相关关系,与0.002~0.05 mm的粉砂和0.05~2.00 mm的砂砾呈极显著负相关关系;不同林型的土壤颗粒体积分形维数随土层深度增加变化不同,10龄和22龄橡胶林土壤粒径分布曲线的波动性较32龄橡胶林的小,各层颗粒之间的差异性较32龄的大;分形维数和土壤黏粒体积百分含量与全钾含量和自然含水率都在p0.05水平呈显著正相关关系,粉砂体积百分含量除与上述土壤基本性质呈显著负相关关系外,还与土壤有机质、全磷呈显著负相关,而分形维数和土壤黏粒体积百分含量与土壤有机质、全磷、全氮、土壤容重、总孔隙度的相关性未达到显著水平。
[Abstract]:The distribution of soil particle size affects the homogeneity of soil texture and soil fertility, which is one of the important physical characteristics of soil. Based on the fractal dimension model of soil particle volume, the fractal dimension D values of different layers (105 soil samples) in rubber forest profiles of different forest ages in Xishuangbanna were calculated. The results show that the fractal dimension D is between 2.636 and 2.885. The fractal dimension has a very significant positive correlation with the volume percent content of 0.002 mm clay, and a very significant negative correlation with the sand of 0.002 ~ 0.05mm and the gravel of 0.05 ~ 2.00mm. The fractal dimension of soil particle volume of different forest types varies with the increase of soil depth. The fluctuation of soil particle size distribution curve of 10 and 22 years old rubber forest is smaller than that of 32 years old rubber forest, and the difference between different layers is larger than that of 32 years old. Fractal dimension and soil clay volume percentage had significant positive correlation with total potassium content and natural moisture content at p0.05 level, and silt volume percentage content had a significant negative correlation with the basic properties of soil, but also with soil organic matter. There was a significant negative correlation between total phosphorus and soil organic matter, total phosphorus, total nitrogen, soil bulk density and total porosity, while the fractal dimension and the content of soil clay volume were not significantly correlated with soil organic matter, total phosphorus, total nitrogen, soil bulk density and total porosity.
【作者单位】：云南师范大学旅游与地理科学学院;河海大学水文水资源与水工程科学国家重点实验室;云南省水文水资源局;
【基金】：云南省水利厅水利科技项目(No.2014003) 国家自然科学基金项目(No.41461015) 江苏省博士后科研资助计划项目(No.150106B)
【分类号】：S714

【相似文献】