摘要
以吉林省金仓林场不同密度的长白落叶松(Larix olgensis)天然林为对象,运用森林生态学典型样地法设立标准地并获取野外数据,结合实验室测定结果探讨土壤有机碳的分布特征及其与其他土壤性质的关系。结果表明:长白落叶松天然林土壤有机碳质量分数和有机碳密度均随土壤深度增加而显著减少,土壤有机碳平均质量分数为26.46 g.kg-1;0<土壤深度(h)≤60 cm土层中有机碳密度为18.63 kg.m-2;0<h≤60 cm土壤有机碳密度与土壤密度呈极显著负相关,与土壤全N、全P和速效K呈极显著正相关,而不同土层的有机碳密度与土壤理化性质的相关性不尽一致;林分密度不同程度地影响土壤有机碳和其他养分的分布情况。林分密度为800～880株.hm-2时,土壤多种养分质量分数明显高于其他林分密度养分质量分数,有利于林地土壤理化性质的维持以获得更好的生态和经济效益。
Natural Larix olgensis stands of different densities in Jincang forest farm, Jilin Province were selected to investigate the distribution of soil organic carbon （SOC） and its correlations with other soil properties by typical sample plot method of forest ecology. The results showed： SOC content and density in L. olgensis decrease significantly with the increase of soil depth, and the mean mass fraction of SOC content is 26.46 g . kg-1. When 0〈h ≤60 cm （ h = soil depth）, SOC density in the whole soil profile is 18.63 kg . m-2. In the whole soil profile, 0〈h≤60 cm, SOC density has significant negative correlations with soil bulk density, but positive correlations with total soil N, P and available K. In different soil layers, the correlations were different between SOC density and soil physico-chemical properties. Stand density can affect SOC distri- bution and other soil properties to some extent. The stand density between 800 trees . hm-2 and 880 trees . hm-2 with higher soil nutrients content is suggested to be benefit to gain greater ecological and economic benefits.
出处
《东北林业大学学报》
CAS
CSCD
北大核心
2013年第2期51-55,共5页
Journal of Northeast Forestry University
基金
"973"计划项目(2011CB403201)
国家林业局公益性行业科研项目(20100400201)
中央高校基本科研业务费专项资金资助(TD2011-2)
关键词
长白落叶松
土壤有机碳
土壤有机碳密度
土壤理化性质
林分密度
Larix olgensis
Soil organic carbon （SOC）
Soil organic carbon density
Soil physico-chemical properties
Stand density
作者简介
第一作者简介：刘玲，女，1988年1月生，教育部水土保持与荒漠化防治重点实验室（北京林业大学），硕士研究生。
通信作者：王海燕。教育部水土保持与荒漠化防治重点实验室（北京林业大学），副教授。E-mail：haiyanwang72@yahoo．com.cn.
