DOI: 10.3724/SP.J.1145.2009.00313

Chinese Journal of Appplied Environmental Biology (应用与环境生物学报) 2009/15:3 PP.313-317

Characteristics of Biomass and Carbon Stock of Fir and Birch Fine Roots in Subalpine forest of Western Sichuan, China*

Monthly dynamics of biomass and carbon stock of Abies faxoniana Rehder & E. H. Wilson and Betula platyphylla Sukaczev fine roots in the forests in western Sichuan were studied in order to understand the belowground process of subalpine forest ecosystem and the role of fine roots in forest carbon pool, employing the method of sampling soil core in a growth period of 2006. The fine root biomass of A. faxoniana [(6.579±0.220) t hm-2] was significantly higher than that of B. platyphylla [(3.334±0.182) t hm-2]. The highest and lowest values of fine root biomass were observed in October and June, respectively. Additionally, higher biomass of dead fine roots was observed after higher biomass of living fine roots was found. Both biomass and carbon stock of fine roots decreased with increasing of soil depth. 83.24% and 16.76% of A. faxoniana fine roots distributed in 0~10 cm and 11~20 cm soil layers, respectively. Similarly, 50.26% and 80.39% of B. platyphylla fine roots occurred in 0~10 cm and 0~20 cm soil layers, respectively. Living fine roots accounted for 73% of the total fine roots in different soil layers. 47.21%±2.56% and 42.71%±0.89% carbon contents, and (3.106±0.104) t hm-2 and (1.377±0.078) t hm-2 carbon were measured, in A. faxoniana and B. platyphylla fine roots , respectively. Fig 1, Tab 3, Ref 37

Key words:subalpine,fine root,biomass,carbon stock,Aies faxoniana,Betula platyphylla,western Sichuan

ReleaseDate:2014-07-21 15:01:44

Funds:Supported by the National Natural Science Foundation of China (Nos. 30771702, 30471378), the Key Sci-tech Supporting Project of the 11th 5-year-plan of China (No. 2006BACD01A11), the Program for New Century Excellent Talents in Universities (No. NCET-07-0592), and the Science and Technology Foundation for the Excellent Youth of Sichuan, China (No. 07ZQ026-022)

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