林窗对川西亚高山岷江冷杉幼苗生物量及其分配格局的影响

应用生态学报

林窗对川西亚高山岷江冷杉幼苗生物量及其分配格局的影响

鲜骏仁^1,2;胡庭兴¹;张远彬³;王开运⁴

¹四川农业大学四川省生态林业工程重点实验室, 四川雅安 625014;²四川农业大学资源环境学院, 四川雅安 625014;³中国科学院成都生物研究所, 成都 610041;⁴华东师范大学上海市城市化生态过程与生态恢复重点实验室, 上海 200062

收稿日期:2006-03-21 修回日期:1900-01-01 出版日期:2007-04-05 发布日期:2007-04-05

Effects of forest canopy gap on Abies faxoniana seedling’s biomass and its allocation in subalpine coniferous forest of West Sichuan

XIAN Jun-ren^1,2; HU Ting-xing¹; ZHANG Yuan-bin³; WANG Kai-yun⁴

¹Key Laboratory of Ecological Forestry Engineering of Sichuan Province,Sichuan Agricultural University, Ya’an 625014, Sichuan, China;²College of Resource and Environment, Sichuan Agricultural University, Ya’an 625014, Sichuan, China;³Chengdu Institute of Biology, Chinese Academy of Sciences, Chengdu 610041, China;⁴Key Laboratory of Urbanization and Ecological Restoration of Shanghai City, East China Normal University, Shanghai 200062, China

Received:2006-03-21 Revised:1900-01-01 Online:2007-04-05 Published:2007-04-05

摘要/Abstract

摘要： 采用样带法调查了川西亚高山原始岷江冷杉林林窗和林冠下岷江冷杉幼苗(H≤100 cm)的密度、高度、基径和各构件生物量,分析了各构件生物量间的相关性.结果表明：林窗与林冠下幼苗密度分别为12 903和2 017株·hm^-2;平均高度分别是26.6和24.3 cm,差异显著;平均基径分别为4.97和5.13 mm,差异不显著.林窗内各龄级幼苗的生物量与林冠下同龄级幼苗的生物量之间差异不显著.林窗对不同龄级幼苗各构件生物量积累的影响不同,林窗内幼苗枝干生物量比在12年达到最大(1.54),随后其比值维持在0.69左右;林冠下幼苗在15年后(含15年),枝条生物量大于主干生物量.生长在林窗和林冠环境的幼苗单株总生物量、叶生物量、茎生物量、地上生物量和根生物量与幼苗基径的平方(D²)和苗高(H)的乘积有显著的线性关系.林窗与林冠下幼苗各构件生物量之间有显著的正相关关系.

关键词: 高原鼠兔, 扰动强度, 扰动阈值, 放牧质量

Abstract: By the method of strip transect sampling, the density, height, basal diameter, and components biomass of Abies faxoniana seedlings (H≤100 cm) lived in the forest gap (FG) and under the forest canopy (FC) of subalpine natural coniferous forest in West Sichuan were investigated, and the relationships among different components biomass were analyzed. The results indicated that the density and average height (H) of A. faxoniana seedlings were significantly different in FG and under FC, with the values being 12 903 and 2 017 per hectare , and 26.6 cm and 24.3 cm, respectively, while no significant differences were found in average basal diameter (D) and biomass. The biomass allocation in seedling’s components was markedly affected by forest gap. In FG, the biomass ratio of branch to trunk (BRBT) reached the maximum (1.54) at 12th year, and then, declined and fluctuated at 0.69. Under FC, the BRBT was increased with seedlings growth, and exceeded 1.0 at about 15th year. The total biomass and the biomass of leaf, stem, shoot and root grown in FG and under FC were significantly linearly correlated with D²H. There were significant positive correlations among the biomass of different seedling’s components.

Key words: plateau pika, disturbance intensity, disturbance threshold, grazing quality.

鲜骏仁^1,2;胡庭兴¹;张远彬³;王开运⁴. 林窗对川西亚高山岷江冷杉幼苗生物量及其分配格局的影响[J]. 应用生态学报.

XIAN Jun-ren^1,2; HU Ting-xing¹; ZHANG Yuan-bin³; WANG Kai-yun⁴ . Effects of forest canopy gap on Abies faxoniana seedling’s biomass and its allocation in subalpine coniferous forest of West Sichuan[J]. Chinese Journal of Applied Ecology.

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