鸡公山自然保护区4种森林植被凋落物量及动态  

Amount and Seasonal Dynamics of Litterfall in Four Vegetation Types in Jigong Mountain Nature Reserve

作　　者：张玉虎 周亚运 柳勇 冯万富 张学顺 单燕祥 

机构地区：[1]信阳市林业科学研究所,河南信阳464031 [2]河南鸡公山森林生态系统国家定位观测研究站,河南信阳464031

出　　处：《云南农业大学学报（自然科学版）》2017年第2期310-315,共6页Journal of Yunnan Agricultural University:Natural Science

基　　金：国家重点基础研究发展计划项目(2011CB403201);国家林业公益性行业科研专项(201204101);信阳市科技公关计划项目(140030)

摘　　要：为探究鸡公山自然保护区典型林分生态系统凋落物量及季节动态,于2013年4月至2014年3月,采用凋落物收集器法对鸡公山4种植被类型凋落物量及组成进行研究。结果表明:年凋落量排名为落叶阔叶林(8.43 t/hm^2)>针阔混交林(8.15 t/hm^2)>马尾松纯林(7.73 t/hm^2)>杉木纯林(7.19 t/hm^2);各植被类型均以落叶为主,占50%~71%,表现为落叶>落枝>落果>落花;各植被类型月凋落量均呈双峰趋势,分别于7月左右和12月达到峰值;各组分凋落量月动态明显不同,落叶峰值在12月,占叶年凋落量的40%左右,落枝主要集中在7~10月,落花主要在4月,占花年凋落量的60%,而落果主要在10月,杉木纯林则在翌年2月达到峰值。不同植被类型凋落物量从一定程度上反映出植物的生物学特征和对干旱胁迫的适应性。To explore the litterfall and seasonal dynamics of forest ecosystem in main vegetation types, by the method of litterfall trap, amount and composition of litterfall in four vegetation types in Jigong Mountain Nature Reserve were surveyed from April 2013 to March 2014.The results showed annual litterfall amount rank was deciduous broad-leaved forest（8.43 t/hm^2）〉 needle and broad-leaved mixed forest（8.15 t/hm^2）〉 Pinus massoniana forest（7.73 t/hm^2）〉 Cunninghamia lanceolata forest（7.19 t/hm^2）.Leaf litter is the main litterfall which account for 50%-71% of total production,then are branch litter, fruit litter and flower litter, respectively. The monthly dynamics of litterfall showed a double peaks, with the first appeared in July and the maximum in December; the monthly dynamics of plant components were obvious different, leaf fall peak appear in December that account for about 40% of annual leaf litter amount, branch litter mainly from July to October, flower litter mainly in April that account for 60% of annual amount, fruit litter mainly in October; however;the Cunninghamia lanceolata forest reach the peak in February of second year.The litter amount and dynamics of different vegetation types reflect the biological characteristics and adaptability to drought stress of plant in some extent.

关 键 词：鸡公山 凋落物 季节动态 暖温带-亚热带过渡区 

分 类 号：S718.54[农业科学—林学]