摘要
【目的】探索梵净山冷杉(Abies fanjingshanensis)凋落物动态特征及其在森林生态系统养分循环中的作用。【方法】以梵净山冷杉林为研究对象,研究了凋落物中N、P、K和Mg含量及其年归还量。【结果】冷杉林的年凋落量为5 625.8 kg/hm^2;冷杉林的凋落物主要以落叶、落果、落枝和其他碎屑为组成部分,其中以落叶含量最多,占总凋落量的48.37%,凋落量的月变化模式呈现出10—11月、4—5月达到两个峰值;凋落物养分含量的大小顺序为:N>K>P>Mg;N、P、K、Mg的年归还量分别为:38.83、4.28、14.59和0.09 kg/hm^2;梵净山冷杉凋落物4种组分的养分年归还量中,落叶的养分归还量明显高于其他3种成分,占总归还量的52.65%。【结论】冷杉凋落量和养分归还量中,梵净山冷杉落叶都占绝对优势。
【Objective】The aims of this study was to explore the litter dynamic characteristic of A. fan-jingshanensis and its effect on nutrient cycling in forest ecosystem.【Method】Litters were monthlycollected from Fanjinshan. Monthly variation of litter components and nutrient elements （N,P,K andMg） in different litter components were also analyzed.【Result】The annual litterfall of A. fanjingshanensiswas approximately5 625.8 kg/hm2and the litter mainly consisted of leaves,twigs,fruits and otherresiduals. The leaves accounted for 48.37% of the total litter mass. There were two peaks in annual liferfall dynamic and they were from Oct. to Nov. and from Apr. to May,respectively. The content nutrientelements followed an order of N〉K〉P〉Mg. The annual return amounts of N,P, K and Mg were 38.83,4.28,14.59 and 0.09 kg/hm2,respectively. Leaves contributed 53.39% to the total return amounts.【Conclusion】Leaves of A. fanjingshanensis has an overwhelming advantage in among different litter components andnutrients return.
作者
黄先飞
张珍明
刘盈盈
何云松
HUANG Xian-fei;ZHANG Zhen-ming;LIU Ying-ying;HE Yun-song(Key Laboratory of Mountain Environment Information System and Eco-environment Protection of Guizhou Province,Guizhou Normal University,Guiyang 550001,China;Guizhou Institute of Biology,Guiyang 550009,China)
出处
《四川农业大学学报》
CSCD
北大核心
2018年第2期161-166,共6页
Journal of Sichuan Agricultural University
基金
贵州科学院青年基金(黔科院J合字[2013]08号)
贵州省省院合作项目(黔科合院地合[2013]7002)
关键词
养分归还量
凋落物
含量
组成
梵净山冷
nutrient return
litter
content
composition
A. fanjingshanensis
