不同类型樟子松林分土壤养分空间变异性的初步研究

就樟子松纯林和樟子松落叶松混交林下的土壤主要养分的含量、性质进行研究,探讨不同林型下土壤养分含量的变异性以及土壤各指标之间的相关关系,揭示研究区域内森林生态系统土壤养分空间分布特征和变异的某些规律。结果表明,樟子松纯林和樟子松落叶松混交林下土壤pH值变异系数为4.22～5.90,属弱变异性;樟子松纯林下层土壤的有效磷含量变异系数达到90.97%,属于强变异性,其他所测的土壤养分指标变异系数在16.38%～50.89%,均属于中等程度变异性。

Spatial Variability of Soil Nutrients for Different kinds of Pinus sylvestris var.mongolica

Content characteristics of major soil nutrients of pure forest of Pinus sylvestris var.mongolica,mixed forest of Pinus sylvestris var.mongolica larch were studied.Variability of soil nutrient content under different forest types correlation of every index of soil were discussed.Spatial distribution certain various laws of soil nutrients for forest ecosystem in research area were revealed.Result shows that： coefficient of variation of soil pH value of pure forest of Pinus sylvestris var.mongolica mixed foresrt of Pinus sylvestris var.mongolica larch is about 4.22-5.90,being weak variability;the coefficient of variation of available phosphorus content of subsoil of pure forest of Pinus sylvestris var.mongolica reached 90.97%,being strong variability;other indicators of the measured coefficient of variation of soil nutrients are about 16.83%-50.89%,belonging to the moderate variability.