摘要
运用经典统计学方法,对东北林业大学哈尔滨实验林场白桦(Betula platyphylla Suk.)人工林林地土壤主要营养元素时空变异进行了研究,结果表明:随林龄的增加,土壤全N、全P质量分数及pH值均较1983年的观测值下降,C元素则较1983年的观测值增加;土壤全N、水解性N、全P、速效P和全K质量分数的变化趋势是随土壤深度的增加而减小,但速效K与全K的变化趋势相反,C元素在土层20 cm以下的质量分数高于0～20cm土层;全N、全P、全K以及水解性N、速效K、速效P和pH值的变化趋势均是生长旺盛月份的质量分数(或值)较低,其他月份质量分数(或值)较高;观测期内除pH值为弱变异外,其他各营养元素仅为中等变异,林地土壤均质性较好。
By using classical statistics method, an experiment was conducted to study the spatial and temporal variability of soil main nutrient contents in Betula platyphylla Suk plantation from Harbin Experimental Forest Farm of Northeast Forestry U- niversity. The results show that with the increase of the stand age, the contents of total N, total P and pH decrease those in 1983, and C content increases compared with that in 1983. The contents of total N, hydrolysis N, total P, available P and total K have the same change tendency that they decrease with depth increasing. Available K has the contrary tenden- cy, and C content below 20 cm of soil layer is higher than that in 0-20 cm. Total K, total N, total P, total K, hydrolysis N, available K, available P and pH show the same change tendency, that is, the contents or values are lower in vigorous growth season and higher in other seasons. During the observation period, pH is with weak variation, others are with medi- um variation, and soil has better heterogeneity.
出处
《东北林业大学学报》
CAS
CSCD
北大核心
2013年第5期114-118,共5页
Journal of Northeast Forestry University
基金
黑龙江省教育厅科学技术研究项目(11553035)
