| 鼎湖山南亚热带常绿阔叶林凋落物量20年动态研究 |
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| 引用本文： | 官丽莉,周国逸,张德强,刘菊秀,张倩媚. 鼎湖山南亚热带常绿阔叶林凋落物量20年动态研究[J]. 植物生态学报, 2004, 28(4): 449-456. DOI: 10.17521/cjpe.2004.0062 |
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| 作者姓名： | 官丽莉 周国逸 张德强 刘菊秀 张倩媚 |
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| 作者单位： | 中国科学院华南植物研究所，广州510650 |
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| 基金项目： | 中国科学院知识创新工程项目，中国科学院引进国外杰出人才基金，国家重点基础研究发展计划(973计划) |
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| 摘 要： | 研究了鼎湖山森林生态系统定位研究站20年来对常绿阔叶林凋落物量进行监测所积累的资料，探讨这一地带性植被演替过程中凋落物量动态变化格局及组成特征，并分析了主要优势种凋落叶的变化规律及其与凋落物总量的联系。鼎湖山南亚热带常绿阔叶林平均年凋落物量为8.45 t·hm-2，年际波动显著。总体来说年凋落物量呈下降趋势，这与植被所处演替阶段及本身林分特征有关。凋落物的凋落高峰发生在雨季初期（4、5月）和雨季末期（8、9月）。与多数森林不同，鼎湖山南亚热带常绿阔叶林各组分凋落物量的比例顺序为叶>花果杂物>枝。其中锥栗(Castanopsis chinensis)、荷木(Schima superba)、厚壳桂(Cryptocarya chinensis)、黄果厚壳桂(C. concinna) 4种优势种20年平均年凋落物量分别为1.86、0.50、0.26、0.40 t·hm-2，合计占凋落叶量的70%左右，它们的动态直接影响着凋落总量变化格局。
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| 关 键 词： | 南亚热带常绿阔叶林 凋落物量 动态 |
| 收稿时间： | 2003-05-02 |
| 修稿时间： | 2003-05-28 |
TWENTY YEARS OF LITTER FALL DYNAMICS IN SUBTROPICAL EVERGREEN BROAD-LEAVED FORESTS AT THE DINGHUSHAN FOREST ECOSYSTEM RESEARCH STATION |
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| GUAN Li-Li ZHOU Guo-Yi ZHANG De-Qiang LIU Ju-Xiu and ZHANG Qian-Mei. TWENTY YEARS OF LITTER FALL DYNAMICS IN SUBTROPICAL EVERGREEN BROAD-LEAVED FORESTS AT THE DINGHUSHAN FOREST ECOSYSTEM RESEARCH STATION[J]. Acta Phytoecologica Sinica, 2004, 28(4): 449-456. DOI: 10.17521/cjpe.2004.0062 |
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| Authors: | GUAN Li-Li ZHOU Guo-Yi ZHANG De-Qiang LIU Ju-Xiu and ZHANG Qian-Mei |
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| Affiliation: | South China Institute of Botany, Chinese Academy of Sciences, Guangzhou 510650, China |
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| Abstract: | In this paper, we summarize 20 years of observations and measurements on the production, composition, and seasonal dynamics of litter and leaf litter production of dominant species in the southern subtropical evergreen broad-leaved forests at the Dinghushan Forest Ecosystem Research Station. Annual litter production ranged from 6.39 t·hm-2 to 11.04 t·hm-2 with an average of 8.45 t·hm-2. The variation in the annual litter fall was remarkable. Total litter production decreased over the past 20 years reflecting changes in the compositional characteristics and successional stages of the forest. There were two litter fall peaks each year: one at the beginning of the rainy season (April and May) and the other at the end of the rainy season (August and September). The different components of litter production showed a consistent annual temporal sequence in the following order: leaves; flowers and other mixed-materials; branches. The mean annual leaf litter production of Castanopsis chinensis, Schima superba, Cryptocarya chinensis and Cryptocarya concinna was 1.86, 0.50, 0.26 and 0.40 t·hm-2, respectively, which accounted for about 70% of the total leaf litter production. Leaf litter production of the dominant species greatly influenced the dynamics of total litter production, and, to some degree, the dynamics of litter production reflected changes in the forest biomass and community composition over the past 20 years. |
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| Keywords: | Lower subtropical evergreen broad-leaved forest Litter production Litter dynamics Forest development |
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