摘要
本文是广西森林生态系统研究的一部分,对桂北杉木人工林凋落物的数量、组成和动态格局及气候特点进行了5年的综合定位研究,结果表明:里骆成年杉木林年均凋落物量有4.621吨/公顷,变动系数19.40—28.34％。杉木纯林凋落物各组分的比值相当稳定,标准差<5％;杉叶占凋落物总量的46.47％,枝为18.47％,花果为16.91％,杂物为18.20％。凋落量的季节变化格局是,随气候的变冷变干有一秋末—春初的凋落高峰期(11—4月)。并定量地分析了17个气侯因素与凋落物的相关性,研究表明低温干旱和风力是影响凋落物量和动态的关健因子。
This paper deals v ith a part of stationary research on the forest ecosystems in Guangxi and relates to the production, components and seasonal pattern of litter-fall in chinense fir (Cunninghamia lanceolata) plantation as well as climatic characteristics over a 5-year-study-period in North Guangxi. The results show that the mean annual litter in chinense fir plantation is 4.621 t/ha with Cv of 19.40-28.34% in Liluo. The rate of each component of litter-fall is ver stable with in S.D.<5 %. The leaf fraction is 46.47% of annual total litter-fall in chinense fir forest; twig fraction, 18.47% cones fraction, 16.91%;and miscellaneous franction,18.21%. The seasonal pattern of litteting exhibits a distinct peak from the late autumn to early spring as the weather gets colder and drie (Nov. to Apr.) The correlation between 17 climatic factors and litter-fall characters is anal sed quantitativel . The lo er tem-perature dry and wind have been identified as the key -factors influencing the production and dy namics of the litter in chinense fir plantation.
出处
《生态学报》
CAS
CSCD
北大核心
1990年第4期367-372,共6页
Acta Ecologica Sinica
关键词
杉木
凋落物
气候因素
相关分析
Cunninghamia lanceolata, litter-fall, d namics, climalics factors, correlative analysis.
