JOURNAL OF NATURAL RESOURCES ›› 2015, Vol. 30 ›› Issue (1): 133-140.doi: 10.11849/zrzyxb.2015.01.012

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Estimation of Sequestration Potential via Phytolith Carbon by Important Forest Species in Subtropical China

YING Yu-qi1, XIANG Ting-ting1, LI Yong-fu1,2, WU Jia-sen1,2, JIANG Pei-kun1,2   

  1. 1. School of Environmental and Resource Sciences, Lin'an 311300, China;
    2. Zhejiang Provincial Key Laboratory of Carbon Cycling in Forest Ecosystems and Carbon Sequestration, Zhejiang A & F University, Lin'an 311300, China
  • Received:2013-12-09 Revised:2014-04-23 Online:2015-01-20 Published:2015-01-20
  • Contact: 姜培坤(1963-),男,浙江桐乡人,教授,主要研究土壤质量与环境学.E-mail:jiangpeikun@zafu.edu.cn E-mail:jiangpeikun@zafu.edu.cn

Abstract: In this study, seven tree species including broad-leaved forest, coniferous forest, and bamboo forest in subtropical China were selected as experimental materials. The phytolith in the plants was extracted through a microwave digestion method and the phytolith occluded carbon (PhytOC) concentrations in the leaves were determined. The results showed that: 1) all the seven tree species had the potential of carbon bio-sequestration within phytoliths. The PhytOC concentrations in dry leaf biomass of different tree species were in the following order: Phyllostachys pubescens (3.31 ± 0.53 g·kg-1) > Liquidambar formosana (1.12 ± 0.33 g·kg-1) > Cyclobalanopsis glaua (0.88 ± 0.09 g·kg-1) > Schima superba (0.49 ± 0.18 g·kg-1) > Pinus massoniana (0.40 ± 0.11 g·kg-1) > Cunninghamia lanceolata (0.30 ± 0.06 g·kg-1) > Castanopsis sclerophylla (0.19 ± 0.04 g·kg-1). 2) There were strong linear relationships between Si concentrations and phytolith concentrations (P<0.05, R2=0.9897), phytolith concentrations and PhytOC concentrations in the leaf dry weight (P<0.05, R2=0.8816), PhytOC concentrations in phytoliths and PhytOC in the leaf dry weight (P<0.05, R2=0.3544). 3) Phyllostachys pubescens had the highest PhytOC fluxes (0.0506 t-e-CO2·hm-2·a-1), bio-sequestration via phytolith carbon from leaf-litter under 3.87×106 hm2 of Phyllostachys pubescens stands in subtropical China is estimated to be about 1.96×105 t CO2. 4) The phytoliths carbon bio- sequestration flux of Cunninghamia lanceolata and Pinus massoniana were 0.0056 and 0.0108 t-e-CO2·hm-2·a-1, respectively, bio-sequestration via phytolith carbon from leaf-litter under 1.13×107 and 1.20×107 hm2 of Cunninghamia lanceolata and Pinus massoniana stands is estimated to be about about 6.33×104 and 1.30 × 105t CO2, respectively. 5) The phytoliths carbon bio- sequestration flux of broadleaved forests ranged from 0.0005 to 0.0193 t-e-CO2·hm-2, bio-sequestration via phytolith carbon from leaf-litter under 2.49×107 hm2 of broad-leaved forests in subtropical China is estimated to be about 1.25×104-48.15×104 t CO2.

CLC Number: 

  • Q945.1