天然次生白桦林凋落物的分解及其生态效应  

THE DECOMPOSITION AND ECOLOGICAL EFFECT OF LITTER IN THE NATURAL SECONDARY WHITH BIRCH STAND

作　　者：孟繁荣[1] 邵力平[1] 薛煜[1] 孙延军[1] 郭立新 

机构地区：[1]东北林业大学 [2]林业部林产工业设计院

出　　处：《林业科技》1991年第3期1-4,共4页Forestry Science & Technology

基　　金：国家自然科学基金

摘　　要：1988～1990年间以长白山支脉张广才岭帽儿山老爷岭生态站天然次生白桦林为研究对象,对林分凋落物的积累,组成与分解进行了定位观察研究。结果表明,38年生白桦林凋落物的现存量为13.644t/ha,其中叶为10.49t/ha,枝为2.58t/ha,树皮、种实、动物尸体及粪便等仅为0.57t/ha,年凋落盈为3.38t/ha,年分解量为0.633t/ha,年分解率为18.7％。The composition, accumulation and decomposition of litter in a white birch forest were observed and researched by fixed sampling mcthed from 1988 to 1989. The natural secondary white birch stand within Laoycling Ecological Station, belongs to Maoershan Forest Experiment Farm, geographically located in Zhangguangcailing of the offshoots of Changbai Mountains, was the object of the study. The results showed that total litter accumulated in a 38-ycar-old white birch stand was 13.644 t/ ha, among which, 10.49 t/ ha was from dead leaves, 2.58 t/ha from dead branches and 0.57 t/ha from barks, fallen seeds and fruits, as well as dead body of animals. The annual litter accumulated on ground was 3.38 l / ha in which 0.633 t/ha was decomposited. The decomposition rate is 18.7%.

关 键 词：白桦林 凋落物 分解 生态效应 

分 类 号：S792.153[农业科学—林木遗传育种]