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Chinese Journal of Applied Ecology ›› 2017, Vol. 28 ›› Issue (12): 3841-3847.doi: 10.13287/j.1001-9332.201712.001

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Carbon density distribution characteristics and influencing factors in aerially seeded Pinus massoniana plantations

PAN Ping1, HAN Tian-yi2, OUYANG Xun-zhi1*, LIU Yuan-qiu1, ZANG Hao1, NING Jin-kui1, YANG Yang1   

  1. 1College of Forestry, Jiangxi Agricultural University, Nanchang 330045, China
    2Jiangxi Province Forestry Survey Planning Institute, Nanchang 330046, China
  • Received:2017-05-02 Online:2017-12-18 Published:2017-12-18
  • Contact: * E-mail: oyxz_2003@hotmail.com
  • Supported by:

    This work was supported by the National Na-tural Science Foundation of China (31360181) and the Chinese Academy of Sciences Strategic Priority Research Program (XDA05050205)

Abstract: The distribution characteristics of carbon density under aerially seeded Pinus massoniana plantations in Ganzhou City of Jiangxi Province were studied. Total 15 factors, including site, stand, understory vegetation, litter and so on were selected to establish a relationship model between stand carbon density and influencing factors, and the main influencing factors were also screened. The results showed that the average carbon density was 98.29 t·hm-2 at stand level with soil layer (49.58 t·hm-2) > tree layer (45.25 t·hm-2) > understory vegetation layer (2.23 t·hm-2) > litter layer (1.23 t·hm-2). Significantly positive correlations were found among the tree, litter and soil layers, but not among the other layers. The main factors were tree density, avera-ge diameter at breast height (DBH), soil thickness, slope position, stand age and canopy density to affect carbon density in aerially seeded P. massoniana plantations. The partial correlation coefficients of the six main factors ranged from 0.331 to 0.434 with significance by t test. The multiple correlation coefficient of quantitative model I reached 0.796 with significance by F test (F=9.28). For stand density, the best tree density and canopy density were 1500-2100 plants·hm-2 and 0.4-0.7, respectively. The moderate density was helpful to improve ecosystem carbon sequestration. The carbon density increased with increasing stand age, DBH and soil thickness, and was higher in lower than middle and upper slope positions.