摘要
采用网袋法,对栎林生态系统凋落物分解及磷素释放规律进行研究,建立凋落物分解残留率与时间的数学关系式,分析凋落物各组分的半衰期及失重率为95%的分解期。结果表明:细根、中根、落叶、枯枝和粗根的年失重速度分别为96 59%,69 62%,53 87%,48 53%和41 55%,细根、中根、枯枝、落叶和粗根磷的年释放率分别为92 52%,68 72%,50 50%,46 89%和39 06%。研究进一步阐明了温度、水分及微生物性状是影响凋落物分解的重要因素。
Study on the litter decomposition and phosphorus release in an oak(Quercus variabilis )forest ecosystem was made by means of decomposition date obtained from litter bag in Jiangsu Province The mathematical models of litter weight residual rate with decomposition duraton were set up,and also the half declining and 95% declining times were estimated.The main results showed that the order for annual decomposition rate of litter weight was fine roots >mediumdiameter roots>fallen leaves>withered branches>thick roots,while the order for annual release rate of phosphorus was fine roots>mediumdiameter roots>withered branches>fallen leaves>thick roots.Results also showed that temperature,moisture content and microorganism were the main factors to influence litter decomposition.
出处
《浙江林学院学报》
CSCD
北大核心
2002年第4期367-371,共5页
Journal of Zhejiang Forestry College
基金
国家林业局重点项目(下蜀森林生态系统定位研究)
国家自然科学基金资助项目(39970605)
关键词
栎林
生态系统
凋落物分解
磷素
释放规律
oak (Quercus variabilis)forest
ecosystem
litter
phosphorus
decomposition property
