不同年龄序列杉木人工林凋落物数量、组成及动态变化  

Amount,Composition and Seasonal Dynamics of Litterfall in Different Ages of Cunninghamia lanceolata Plantations

作　　者：郜士垒 何宗明[1,2] 黄志群[3] 林思祖[1,2] 刘桌明 郑璐嘉 

机构地区：[1]国家林业局杉木工程技术研究中心,福建福州350002 [2]福建农林大学林学院,福建福州350002 [3]福建师范大学地理科学学院,福建福州350007

出　　处：《江西农业大学学报》2015年第4期638-644,共7页Acta Agriculturae Universitatis Jiangxiensis

基　　金：国家自然科学基金项目(41371269);教育部新世纪优秀人才支持计划(DB-168)

摘　　要：在福建南平地区,对8年、14年、21年、46年生杉木人工林凋落物数量、组成及季节动态进行研究。结果表明：8年、14年、21年、46年生杉木林年凋落物总量分别为：1.60、5.10、6.28、5.32 t/hm2。各年龄段杉木林凋落物均以落叶为主,8年、14年、21年、46年生杉木林叶凋落量分别占到年总凋落物量的61.9%、54.13%、61.9%、44.2%,落枝,杂叶和落果在凋落物中所占的比例较大。经方差分析检验,8年、14年、21年、46年生杉木林的落叶、落枝、杂叶、落果、碎屑等组分差异显著（P〈0.05）。各年龄段杉木林凋落物量均显示出明显的季节动态,8年、14年、21年、46年生杉木林凋落物量季节变化曲线均呈多峰型,均在3月、5月、8月、11月出现峰值;各年龄段杉木林的落叶、落枝、落果变化模式相同,均在3月、5月、8月、11月出现峰值,而凋落的杂叶和碎屑物变化模式不尽相同。A study was carried out to determine the amount,composition and seasonal dynamics of litterfall in plantations of Cunninghamia lanceolata at the ages of 8,14,21,46 years in Nanping,Fujian.The results showed that the annual litterfall was up to 1.60,5.10,6.28,5.32 t/hm2 in Cunninghamia lanceolata at the ages of 8,14,21,46 years.With leaves being major component of litterfall during the entire year in different ages, which accounted for 61.9%,54.13%,61.9%,44.2%of the total production,respectively,the proportions of branches,mixed leaves and fruits in litterfall were larger.The analysis of variance showed that there was a signifi-cant difference in the amounts of leaves,branches,mixed leaves,fruits and pieces among these four plantations （ P〈0.05） .There was significant seasonal variation in different ages,the litterfall of Cunninghamia lanceolata at the ages of 8,14,21,46 years occurred irregularly from month to month,reaching the multiple peaks in March, May,August and November.The variation patterns of leaves,branches and fruits of Cunninghamia lanceolata at the ages of 8,14,21,46 years were the same,and all peaked in March,May,August and November.But the pat-terns of mixed leaves and residue of Cunninghamia lanceolata at the ages of 8,14,21,46 years were different.

关 键 词：杉木 凋落物 季节动态 年龄序列 

分 类 号：S791.27[农业科学—林木遗传育种]