JOURNAL OF NANJING FORESTRY UNIVERSITY ›› 2014, Vol. 38 ›› Issue (02): 169-174.doi: 10.3969/j.issn.1000-2006.2014.02.033

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Measurement and analysis on understory light environment and canopy structure of Pinus tabulaeformis plantation in the Taiyue Mountain

ZHANG Yanlei1,KANG Fengfeng1,HAN Hairong1*,YIN Xuezhe1,CHENG Xiaoqin1,LI Yong1, ZHOU Bin1,LIU Ke1, SUN Jingjun2   

  1. 1. Key Laboratory for Silviculture and Conservation of Ministry of Education, College of Forestry,Beijing Forestry University, Beijing 100083, China;
    2. Qinyuan County Maquan Forestry Farm of Taiyue National Forest Bureau in Shanxi Province, Qinyua
  • Online:2014-03-10 Published:2014-03-10

Abstract: In this paper, the understory light characters were measured and analyzed in Pinus tabulaeformis plantation(juvenile and mid-aged stands)with WinScanopy instrument in Mt. Taiyue, Shanxi province, China. The relationship between canopy structure and light characters were also analyzed. The results indicated that stand openness(9.68%-16.20%)decreased, whereas the LAI in the stand(2.000-3.784)increased with stand density increasing. The total PPFD above canopy ranged from 25.37 to 29.10 MJ/(m2·d)in P. tabulaeformis plantation. And the total PPFD under canopy deceased with the stand density ranged from 4.22 to 11.07 MJ/(m2·d). The light extinction ratio enlarged with the stand density increasing. And the light extinction coefficient of mid-aged stand(0.59)was stronger than that in the juvenile stand(0.27). The direct PPFD was the main component of total PPFD under canopy.

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