CAJ | 학술논문

为了揭示林分冠层结构和林内光环境特征的关系，利用冠层分析仪（ WinScanopy）对比分析了山西省太岳山马泉林场油松人工林（幼龄林和中龄林）冠层结构及林分光环境特征。结果表明：在林分密度逐步增大情况下，林分开度呈现下降趋势，总体分布范围为9?68％～16?20％；叶面积指数随林分密度的增大相应增加，总体分布范围为2?000～3?784。林分冠上总辐射分布范围为25?37～29．10 MJ/（ m2·d），林下总辐射为4?22～11?07 MJ/（ m2·d）。林下总辐射随林分密度的增大而降低，表明林分对光辐射的截获能力随之增强。幼龄林消光系数为0．27，中龄林消光系数为0．59，中龄林林分消光能力大于幼龄林林分。林下直射是林下总辐射的主要组成部分。
위료게시림분관층결구화림내광배경특정적관계，이용관층분석의（ WinScanopy）대비분석료산서성태악산마천림장유송인공림（유령림화중령림）관층결구급림분광배경특정。결과표명：재림분밀도축보증대정황하，림분개도정현하강추세，총체분포범위위9?68％～16?20％；협면적지수수림분밀도적증대상응증가，총체분포범위위2?000～3?784。림분관상총복사분포범위위25?37～29．10 MJ/（ m2·d），림하총복사위4?22～11?07 MJ/（ m2·d）。림하총복사수림분밀도적증대이강저，표명림분대광복사적절획능력수지증강。유령림소광계수위0．27，중령림소광계수위0．59，중령림림분소광능력대우유령림림분。림하직사시림하총복사적주요조성부분。
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.