林芝地区川滇高山栎林林隙特征研究

[目的]研究林芝地区川滇高山栎林林隙特征。[方法]从林隙的形成方式、大小分布和形成木特征等几方面对林芝地区高山栎林林隙的形成特征进行了初步研究。[结果]林芝地区林隙以人为砍伐形成的最多;林隙线状密度为23.9个/km;冠空隙平均面积为11.2 m2,占整个林分面积的3.7%;扩展林隙的平均面积为26.1 m2,占整个林分面积的8.6%;林隙的形成速率为0.46个/（km.a）;林隙的形成木以川滇高山栎林为主,径级集中分布在40～60 cm;林隙形成木在各个腐烂等级上分布不均匀,以C级分布较多,占44.8%。[结论]高山栎林林隙大小对幼苗更新与稳定起着重要作用。

Study on Gap Characteristics of Quercus aquifolioides Forest in Nyingchi Areas

[Objective]To study gap characteristics of Q.aquifolioides forest in Nyingchi areas.[Method]Forming characteristics of gap among in Q.aquifolioides forest in Nyingchi were preliminarily studied through the gap-forming manner,size distribution of gap and the characteristics of gap maker.[Result]Deforestation was the prime cause of the most gaps formation;the linear gap density in the forest was 23.9 gaps/km;the average area of canopy gaps(CG)and expanded gaps(EG)were 11.2 and 26.1 m2 respectively,and covered 3.7% and 8.6% of the total land area,respectively;the rate of gap formation was 0.46 gap/(km·a);the major gap maker was Q.aquifolioides,and it was most possible to create gaps when the diameter class was 40-60 cm;the distribution of grade maker was uneven in each decay class,the distribution of class C occupied most,and accounted for 44.8%.[Conclusion]The results showed that the gap size of Q.aquifolioides had an important role in natural regeneration and stabilization of Q.aquifolioides seedlings.