不同林龄栓皮栎林下土壤颗粒分形及养分特征研究

发布时间：2018-10-25 18:50

【摘要】：运用土壤粒径组分质量分布原理与分形理论,通过野外调查与室内试验分析,对太行山南麓地区4种林龄栓皮栎林下土壤粒径分形特征与养分特征进行研究。结果表明,1)不同林龄栓皮栎土壤颗粒质量分布差异明显,随栓皮栎林龄增加,黏粒、粉粒含量呈上升趋势,沙粒含量随林龄增加而减少;2)4种林龄栓皮栎林下0~40cm土壤粒径分形维数D在1.35~2.61之间,均值为2.14,其分形维数与土壤黏粒、粉粒含量呈正相关关系,与沙粒含量呈负相关关系;3)不同林龄栓皮栎的土壤理化性质存在差异,速效磷与有机质含量40 a生高于10 a生,全氮含量差异不明显,土壤中全氮、速效磷、有机质含量均与分形维数D呈正相关关系。
[Abstract]:Based on the distribution principle and fractal theory of soil particle size components, the fractal characteristics and nutrient characteristics of soil particle size under four forest age forest types of Quercus variabilis in the southern foot of Taihang Mountain were studied by field investigation and laboratory test. The results were as follows: 1) the distribution of soil particle mass of Quercus variabilis was significantly different at different forest ages. With the increase of forest age, the content of clay and silt increased, and the content of sand decreased with the increase of forest age. 2) the fractal dimension D of 0~40cm soil diameter was between 1.35 and 2.61, the mean value was 2.14. The fractal dimension was positively correlated with soil clay and silt content, and negatively correlated with sand content. 3) the soil physical and chemical properties of Quercus variabilis at different forest ages were different. The contents of available phosphorus and organic matter in 40 years old were higher than those in 10 years old, but there was no significant difference in total nitrogen content, total nitrogen and available phosphorus in soil. The content of organic matter was positively correlated with the fractal dimension D.
【作者单位】：河南农业大学林学院;
【基金】：国家自然科学基金项目(31270750) “十二五”国家科技支撑计划项目(2011BAD38 B00)
【分类号】：S714

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