Effects of forest canopy gap on biomass of  seedlings and its allocation
in subalpine coniferous forests of western Sichuan

doi:10.1007/s11461-008-0057-0

2008, Vol. 3

Issue (3) : 271-278 https://doi.org/10.1007/s11461-008-0057-0

Effects of forest canopy gap on biomass of seedlings and its allocation in subalpine coniferous forests of western Sichuan

XIAN Junren¹, HU Tingxing², ZHANG Yuanbin³, WANG Kaiyun⁴

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

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Abstract Using a strip transect sampling method, the density, height (≤100 cm), basal diameter and components of biomass of Abies faxoniana seedlings, living in a forest gap (FG) and under the forest canopy (FC) of subalpine natural coniferous forests in western Sichuan, were investigated and the relationships among different components of biomass analyzed. The results indicated that the density and average height (H) of A. faxoniana seedlings were significantly different in the FG and under the FC, with the values being 12903 and 2017 per hm², and 26.6 and 24.3 cm. No significant differences were found in the average basal diameter (D) and biomass. The biomass allocation in seedling components was significantly affected by forest gap. In the FG, the biomass ratio of branch to stem reached a maximum of 1.54 at age 12 and then declined and fluctuated around 0.69. Under the FC, the biomass ratio of branch to stem increased with seedling growth and exceeded 1.0 at about age 15. The total biomass and the biomass of leaves, stems, shoots and roots grown in the FG and under the FC were significantly correlated with D²H. There were significant and positive correlations among the biomass of different components.

Issue Date: 05 September 2008

Cite this article:

HU Tingxing,XIAN Junren,ZHANG Yuanbin, et al. Effects of forest canopy gap on biomass of seedlings and its allocation in subalpine coniferous forests of western Sichuan[J]. Front. For. China, 2008, 3(3): 271-278.

URL:

https://academic.hep.com.cn/ffc/EN/10.1007/s11461-008-0057-0
https://academic.hep.com.cn/ffc/EN/Y2008/V3/I3/271

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