天目山3种类型森林的叶凋落量及动态特征  

Amount and Dynamics of Leaf Litter in Three Types of Forest in Tianmushan National Nature Reserve

作　　者：丁山 宋思婧 庞春梅[2] 王通 郑枭 余树全[1] DING Shan;SONG Sijing;PANG Chunmei;WANG Tong;ZHENG Xiao;YU Shuquan(College of Forestry and Biotechnology,Zhejiang A&F University,Hangzhou 311300,China;Tianmushan National Nature Reserve Administration of Zhejiang,Hangzhou 311311,China)

机构地区：[1]浙江农林大学林业与生物技术学院,浙江杭州311300 [2]浙江天目山国家级自然保护区管理局,浙江杭州311311

出　　处：《浙江林业科技》2023年第5期19-26,共8页Journal of Zhejiang Forestry Science and Technology

摘　　要：为了解天目山森林的落叶规律,本文采用凋落物收集法,比较天目山常绿阔叶林、常绿落叶阔叶林和落叶阔叶林的年叶凋落量、叶凋落量动态和主要树种的落叶节律,分析其与森林林分特征的相关关系。结果表明:(1)天目山常绿阔叶林、常绿落叶阔叶林和落叶阔叶林的年叶凋落量分别为4219.49 kg·hm^(-2)、4591.58 kg·hm^(-2)和4262.13 kg·hm^(-2);3种森林的叶凋落量月动态均表现为双峰型,且变化趋势相似,第一个凋落高峰均出现在10月,第二个峰值均在次年4月。(2)3种森林内主要树种落叶节律可分为单峰型、双峰型和不规则型,不同树种的落叶高峰期存在差异。(3)常绿阔叶林优势树种叶凋落量与树种总断面积极显著正相关(P<0.01);常绿落叶阔叶林优势树种叶凋落量与树种密度、树高、树冠面积极显著正相关(P<0.01);落叶阔叶林优势树种叶凋落量与树种总断面积极显著正相关(P<0.01)。以上研究结果可为天目山森林保护与管理提供参考,也为区域及全国尺度上的凋落量研究提供数据基础。In January 2018,3 sample plots with 100 m×100 m were established in evergreen broadleaved forest(EF),evergreen deciduous broadleaved forest(MF)and deciduous broadleaved forest(DF)in Zhejiang Tianmushan National Nature Reserve.Determinations were carried out on DBH,tree height,clear bole height,crowd diameter and species.In September 2018,9 litter collectors were placed in each plots,and were gathered each two weeks till September 2019,with totally 24 times.The results showed that the annual leaf litter of EF,MF,DF was 4219.49,4591.58 and 4262.13 kg/ha,the monthly dynamics of leaf litter showed a bimodal pattern,and the trend of change was similar.The first peak of leaf litter occurred in October,and the second one in the next April.The defoliation rhythm of main tree species in the three types of forest could be divided into single peak type,double peak type and irregular type,with different peak periods.Leaf litter of dominant tree species in EF had extremely significant positive relation with the total basal area of tree species,that in MF had extremely positive relation with tree density,height and crown diameter,and that in DF had extremely significant positive relation with the total basal area of tree species.

关 键 词：天目山 森林类型 叶凋落量 凋落动态 林分特征 

分 类 号：S718.554.2[农业科学—林学]