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研究安徽黄山海拔1400～1600m垂直带自草甸发育的黄山松林分的林隙,采用林隙周边树木年轮生长序列分析方法来推测林隙形成的时间,结果表明林隙形成与更新发生的时间基本相近.通过对林隙太阳辐射日变化的动态观测,建立了林隙中不同位置接受辐射总量及光合有效辐射与林冠空隙面积、扩展林隙面积、扩展林隙上方树冠郁闭状况的相关模型.结果表明,在观测时间段内,林隙中心点的总辐射量与光合有效辐射分别为全光照条件的90%及71%;扩展林隙中接受的总辐射及光合有效辐射分别为全光照条件的30%～40%及25%～33%,而林冠下的光照下足全光照的10%.林冠空隙面积40m2或扩展林隙面积110m2的林隙,其光照基本能满足黄山松的生长,林隙更新能够发生.通过人工方法造成适当面积的小块林隙来促使更新发生,可作为风景区黄山松林在维持景观基础上的经营措施.
The gap of Pinus taiwanensis stands in the vertical zone of 1400-1600 m above sea level in Huangshan Mountain of Anhui Province was studied. The time of formation of gap was estimated by using the tree ring growth sequence analysis method around the forest gap. The results showed that the time of formation and regeneration of gap Which were similar to each other.A dynamic observation of diurnal variation of solar radiation in the gap was conducted to establish the correlation between the total amount of radiation received at different positions in the gap and the area of the canopy gap, the area of the gap and the canopy canopy expansion above the gap Model.The results show that the total radiation and photosynthetically active radiation at the center of the gap are respectively 90% and 71% of the total illumination at the observation time, the total radiation and photosynthetically active radiation received in the extended gap are respectively Light conditions of 30% to 40% and 25% to 33%, while under the canopy full foot light illumination of 10% canopy gap area of 40m2 or expanding gap area of 110m2 gap, the light to meet the basic requirements of Pinus taiwanensis Growth and gap regeneration can occur.It can be used as the management measure of the Huangshan pine forest in the scenic area based on the artificial method of creating a small area of small gaps to promote the regeneration.