建瓯和武夷山米槠天然林凋落物量归还动态  

Dynamics of Litter Decomposition in Natural Forests of Castanopsis Carlesiiin Jian ′ ou and Wuyi Mountain

作　　者：林红莲 李爱萍[1] 官惠玲[1] 马红亮[1,2] 高人 LIN Hong-lian;LI Ai-ping;GUAN Hui-ling;MA Hong-liang;GAO Ren(College of Geographical Science,Fujian Normal University,Fuzhou,Fujian 350007,China;Cultivation Base of State Key Laboratory of Humid Subtropical Mountain Ecology,Fuzhou,Fujian 350007,China;Fujian Provincial Key Laboratory for Plant Eco-physiology,Fuzhou,Fujian 350007,China)

机构地区：[1]福建师范大学地理科学学院,福建福州350007 [2]湿润亚热带山地生态国家重点实验室培育基地,福建福州350007 [3]福建省植物生理生态重点实验室,福建福州350007

出　　处：《福建农业科技》2021年第1期19-25,共7页Fujian Agricultural Science and Technology

基　　金：国家自然科学基金项目(31570607、31770659、41271282、31070548)。

摘　　要：为揭示中亚热带米槠天然林凋落数量、组分及季节动态特征。采用凋落叶直接收集法,于2013年开始对建瓯(主林层平均年龄200年)和武夷山(主林层平均年龄50年)两地的米槠天然林进行为期1年的月凋落物收集并测定其质量和各组分含量。结果表明:建瓯和武夷山米槠天然林年凋落物总量分别为9530.49、5590.18 kg·hm^(-2),建瓯年凋落量显著高于武夷山年均凋落量(P<0.05);建瓯、武夷山米槠天然林年凋落物总量均呈现单峰模式,峰值分别出现在3月、4月;年凋落物的季节变化规律为春季>夏季>秋季>冬季;在凋落枝、叶、果、杂物等4个组成部分以凋落叶占比最大,占年凋落量的50.5%~67.2%,枝(13.1%~20.8%)和杂物(14.5%~17.8%)次之,果(1.9%~14.2%)最低;各组分凋落物季节变化均是春季和夏季高,秋冬季较低。The primary purpose of this study was to reveal the amount,composition and seasonal dynamic characteristics of litters in the natural forest of Castanopsis carlesii in the mid-subtropical zone.By using the method of directly collecting litters,the monthly litters of Castanopsis carlesii natural forests in Jian'ou(the average age of the main forest layer was 200 years)and Wuyi Mountain(the average age of the main forest layer was 50 years)have been collected for one year since 2013,and the quality of litters and the content of each component were measured.The results showed that the annual total amount of litters of Castanopsis carlesii natural forests in Jian′ou and Wuyi Mountain were 9530.49 kg·hm-2 and 5590.18 kg·hm^(-2),respectively,and the annual amount of litters in Jian′ou was significantly higher than that in Wuyi Mountain(P<0.05).The annual total amount of litters of Castanopsis carlesii natural forests in Jian′ou and Wuyi Mountain showed a single peak model,and the peak value appeared in March and April,respectively.The seasonal change rule of the annual amount of litters was spring>summer>autumn>winter.Among the four components of branches,leaves,fruits and sundries,the litter leaves accounted for the largest proportion,accounting for 50.5%-67.2%of the annual amount of litters,followed by branches(13.1%-20.8%)and sundries(14.5%-17.8%),and the fruits(1.9%-14.2%)were the lowest.The seasonal changes of each component of litters were all high in spring and summer,but low in autumn and winter.

关 键 词：中亚热带 米槠天然林 凋落物 动态 

分 类 号：S723.1[农业科学—林木遗传育种]