摘要
本文对彭州人工马尾松(Pinus massoniana)林林隙的一般特征和干扰状况进行了初步研究.共设置三条样线总长3.5km,调查到82个林隙.结果表明:75.61%的冠林隙(CG)分布在20-80m2之间,其中以40-60m2所占面积比例最大,为23.00%;扩展林隙(EG)大小多在60-200m2之间,占87.80%,其中150-200m2所占面积比例最大,为28.74%.林隙的线状密度为23.42个.km-1.不同调查样点林隙的分布格局不同.林隙形成最主要的方式为人为砍伐,比例高达71.46%.林隙的形成木主要是马尾松,占81.29%.林隙形成木的径级主要介于10-25 cm之间,各林隙的形成木在不同径级中株数分配比例不同.65.84%的林隙是由2-5株形成木所形成,平均每个林隙的形成木为5.09株,每株形成木所能形成CG的面积为10.02m2,EG的面积为25.53m2.
The general characteristics and disturbance regime in artificial Pinus massoniana forest in Pengzhou were studied. 3 sampling lines were set whose total length was 3.5km, and 82 gaps were investigated. The results indicte that 75.61% of canopy gaps（CG） distributes from 20m^2 to 80m^2, of which the gaps of 40m^2 to 60m^2 occupy the highest percentage in size, which is 23.00% ; 87.80% of the expanded gaps（EG） distributes from 100 m^2 to 150m^2 , of which the gaps of 150 m^2 to 200 m^2 occupy the highest percentage in size,28.74% of the total. The linear density of gaps is 23.42 km^-1. The gap distribution patterns are different in different samplings. 71.46% of the types of the gap formation is human cutting, which is the main type. Major gap makers in the forest are Pinus massoniana, occupied 81.29% of the total. The diameters of most gap makers range from 10cm to 25cm, and there are different numbers of gap makers in different diameters. 65.84% of the total gaps is formed by 2 to 5 gap makers, with an average 5.09 trees per gap. The size of CG and EG formed by one gap maker is 10.02 m^2 and 25. 53m^2 respectively.
出处
《西华师范大学学报（自然科学版）》
2006年第2期174-179,共6页
Journal of China West Normal University(Natural Sciences)
关键词
林隙
干扰
形成方式
人工马尾松林
彭州
gap
disturbance regime
manners of formation
artificial Pinus massoniana forest
Pengzhou
