千岛湖生态公益林主要树种凋落物分解及碳素动态变化研究  

Study on Decomposition of Litter and Carbon Dynamics of Major Tree Species in Ecological Forest of Qiandao Lake

作　　者：李红俊 高海力 周卫青 向新年 徐剑青 徐高福 LI Hong-jun;GAO Hai-li;ZHOU Wei-qing;XIANG Xin-nian;XU Jian-qing;XU Gao-fu(Chun’an Forestry Bureau of Zhejiang,Chun’an 311700,China;Zhejiang Ecological Forest and State-Owned Forest Farm Administration,Hangzhou 310020,China;Chun’an Xin’anjiang Ecological Development Company of Zhejiang,Chun’an 311700,China)

机构地区：[1]淳安县林业局,浙江淳安311700 [2]浙江省公益林和国有林场管理总站,浙江杭州310020 [3]淳安县新安江生态开发集团有限公司,浙江淳安311700

出　　处：《浙江林业科技》2019年第6期38-44,共7页Journal of Zhejiang Forestry Science and Technology

基　　金：浙江省重点科技创新团队项目(2011R50027)。

摘　　要：采用分解袋法,对千岛湖生态公益林主要树种木荷Schima superba,青冈Cyclobalanopsis glauca,马尾松Pinus massoniana和杉木Cunninghamia lanceolata凋落物的分解速率和碳元素变化动态进行了研究。结果表明,凋落物的分解速率顺序为青冈﹥木荷﹥马尾松﹥杉木,凋落物95%分解时间集中在5.99~7.49 a。木荷和马尾松凋落物分解特性为先快后慢,青冈整体分解速率较快,且出现了3个快速分解期,杉木凋落物在整个试验过程中分解速率变化不大。4个树种凋落物的碳元素剩余率整体均呈下降趋势,但是木荷、青冈和马尾松的碳元素均存在释放停滞期,导致碳元素含量呈现“W”型变化,而杉木碳元素含量没有明显的释放停滞期,碳元素含量阶梯式下降。表明木荷、青冈和马尾松的碳素分解可能为淋溶-富集-释放模式,杉木碳元素分解可能为淋溶-释放模式。During March and April of 2016,litter from forest of Schima superba,Cyclobalanopsis glauca,Pinus massoniana and Cunninghamia lanceolata was collected in Qiandao Lake,Zhejiang province.It was air dried,put into litter bag with 10g each and placed in 3 sample plots with 20 m×20 m each to study litter decomposition and carbon change within 840 days.The results showed that litter decomposition rate was in the order of C glauca>S.superba>P.massoniana>C.lanceolata,and 95%of litter decomposed within 5.99-7.49 year.Decomposition rate of litter from S.superba and P.massoniana forest had characters of fast in the first and slow later,while that from C.glauca was relatively fast with three fast periods.The decomposition rate of litter from C.lanceolata forest had no evident change.The carbon content in litter of the four tree species decreased with decomposition duration,but that of S.superba,C.glauca and P.massoniana had lag phases during the whole process.

关 键 词：凋落物 碳元素 木荷 青冈 马尾松 杉木 千岛湖 生态公益林 

分 类 号：S718.55[农业科学—林学]