长白山4种森林凋落物分解过程中养分动态变化  

Dynamic Changes in Soil Nutrients of Four Types of Forests in Changbai Mountains during Litter Decomposition

作　　者：刘颖[1] 韩士杰[2] 林鹿[1] 

机构地区：[1]华南理工大学,广州510640 [2]中国科学院沈阳应用生态研究所

出　　处：《东北林业大学学报》2009年第8期28-30,共3页Journal of Northeast Forestry University

基　　金：中国科学院知识创新工程重大项目(KZCX2-YW-416);国家自然科学基金项目(90411020)

摘　　要：于2003年5月至2004年9月,在长白山自然保护区北坡垂直植被带的4种林分(阔叶红松林、红松云冷杉林、岳桦云冷杉林和岳桦林)内,利用凋落物原位减少法对凋落物分解过程中的养分动态变化进行了研究。结果表明:4种森林凋落物分解过程中C质量分数变化幅度不大,N和P质量分数都是先上升后下降;K质量分数呈逐渐降低的趋势;阔叶红松林、红松云冷杉林、岳桦云冷杉林和岳桦林凋落物的养分年释放总量依次为1380.80、1145.46、418.74和599.91kg.hm-2.a-1。An experiment was conducted to study the changes in soil nutrients of four types of forests in Changbai Mountains during litter decomposition by the method of in situ litterfall lessening during May 2003 and September 2004. Results showed that the content of carbon changed unobviously, the contents of nitrogen and phosphorus increased first and then decreased, and the content of kalium gradually decreased during decomposition. The total annual amounts of nutrients released by litter decomposition in broadleaved-Korean pine forest, Korean pine and spruce-fir mixed forest, Betula ermanii and spruce-fir mixed forest, and B. ermanii forest were 1 380.80, 1 145.46, 418.74 and 599.91 kg · hm^-2 ·a^-1 , respectively.

关 键 词：凋落物 养分动态 长白山 

分 类 号：Q948[生物学—植物学]