摘要
利用热带次生林林窗边缘树表温和林窗区域地表温的观测资料 ,探讨了昼间林窗各热力作用面的热力效应及其变化规律 .通过分析林窗边缘树表温和林窗地表温的变化 ,指出在林窗区域林窗边缘墙面是林冠面、林窗地面、林内地面之外的新的第 4热力作用面 ;各个热力作用面的热力效应随季节、位置和时刻的不同有着明显差异 .在受浓雾影响的上午 ,林窗地面热力作用较强 ;在中午和下午林窗东侧林缘壁面、林窗东侧 东北侧地面的热力作用显著 ,中午以林窗地面作用较强 ;而下午则以林窗边缘墙面作用较强 .各个热力作用面的热力特征和相互作用将制约林窗的热力变化 ,影响植物的生长 .
Microclimatic measurements were conducted in the canopy gap of tropical secondary forest in Xishuangbanna in fog-cool and dry-hot season.The daytime thermal effect of different thermal active surface in the canopy gap was discussed,and the variations of trunk surface temperature near gap edge and of surface temperature on the gap were analyzed.The result shows that the woody-wall surface is new thermal active surface on the vicinage of canopy gap,with the exception of the forest canopy surface, soil surface in the forest gap,and soil surface of the interior. Because of the influence of season,situs and time,the thermal effect of different thermal active surface of gap was significant different. Being subject to fog, the soil surface on the center of canopy gap is an important thermal active surface in the morning;while in the midday and afternoon,because of the influence of incident radiation, the woody wall and soil surface of edge on the east and the woody wall surface of edge on the north are the key thermal active surface of the canopy gap. In the midday,the thermal active was salient on the surface of gap,and in the afternoon,it was salient on the woody wall. The thermal variations of canopy gap of forest are controlled by the thermal characteristics of different thermal active surfaces and by their interaction,affecting the growth of plants.
出处
《应用生态学报》
CAS
CSCD
2001年第2期179-184,共6页
Chinese Journal of Applied Ecology
基金
国家自然科学基金! (39770 1 4 1 )
云南省自然科学基金! (98C0 98M)
中国科学院"院长基金"
人事部"非教育系统留学回国人员科
关键词
林窗
林缘
林墙
热力作用面
表面温度
热带次生林
Canopy gap, Edge of forest, Woody wall, Thermal active surface, Surface temperature.
