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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 is a part of the research on forest ecosystem in Guangxi. The study on the quantity, composition, dynamic pattern and climatic characteristics of litter in the Chinese fir plantation in northern Guangxi Province for five years showed that the annual litterfall of adult Chinese fir 4.621 tons / ha, the coefficient of variation 19.40-28.34%. The proportion of litter in Chinese fir was quite stable, with the standard deviation of less than 5%. The percentage of cedar was 46.47% of litter, with 18.47% of shoots, 16.91% of flowers and 18.20% of debris. The seasonal variation pattern of litterfall is as follows: the fall of autumn and spring - the peak of litterfall in the early spring (November-April). And quantitatively analyzed the correlation between 17 climate factors and litterfall. Studies have shown that low temperature and drought and wind power are the key factors affecting the litterfall quantity and dynamics.