摘要
以大兴安岭阔叶混交低质林补植改造2 a后土壤肥力为研究对象,采用主成分分析法建立补植改造后土壤肥力指标的评价体系,计算土壤肥力的综合得分。结果表明:不同样地补植改造后土壤肥力的综合得分由大到小为BZ5(0.895)、BZ4(0.823)、BZ3(0.144)、BZ2(-0.336)、BZ1(-0.426)、CK(-0.536)、BZ6(-0.565)。其中BZ5样地的综合得分最高,表明补植密度为800株·hm^(-2)的改造样地最有利于土壤肥力的积累,适宜大兴安岭阔叶混交低质林的改造。各样地的综合得分先是随着补植密度的增大而升高,当补植密度大于800株·hm^(-2)后,样地土壤肥力不佳。
We studied the soil fertility of the low-quality mixed forest of Daxing’an Mountains after 2-a replanting.We established the evaluation system of soil fertility with principal component analysis,and comprehensive evaluation of soil fertility.The comprehensive scores of soil fertility in different plots were BZ5（0.895）,BZ4（0.823）,BZ3（0.144）,BZ2（-0.336）,BZ1（-0.426）,CK（-0.536）and BZ6（-0.565）.The comprehensive score of BZ5 was the highest,which indicated that the integrated density of 800 tree·hm^（-2） was the most suitable one for the alterations of broad-leaved mixed forest in Daxing’an Mountains.With the increase of replanting density,the comprehensive score of all plot was increased accordingly.However,the soil fertility was low when the replanting density was higher than 800 tree·hm^（-2）.
作者
唐国华
董希斌
张甜
曲杭峰
马晓波
管惠文
Tang Guohua Dong Xibin Zhang Tian Qu Hangfeng Ma Xiaobo Guan Huiwen(Key Laboratory of Forest Sustainable Management and Environmental Microorganism Engineering of Heilongjiang Province, Northeast Forestry University, Harbin 150040, P. R. China)
出处
《东北林业大学学报》
CAS
CSCD
北大核心
2017年第4期70-74,共5页
Journal of Northeast Forestry University
基金
"十二五"农村领域国家科技计划课题(2012BAD22B0202-3)
国家自然科学基金项目(31400539)
关键词
大兴安岭
补植改造
土壤肥力
阔叶混交低质林
Daxing＇an Mountains
Replanting alterations
Soil fertility
Broad-leaved mixed low-quality forest
