研究了云南碧塔海两块亚高山云冷杉（Ｐｉｃｅａ－Ａｂｉｅｓ）林内中小尺度林窗的干扰体系，结果表明：林窗和扩展林窗分别占林地面积的１９％和４１％，平均面积为４４ｍ２和１３９ｍ２，林窗的形成频率为０．００５～０．００７／ｙ。估计平均林窗周期为１６７年。大多数林窗（占８７％）的制造林窗树木（ｇａｐ－ｍａｋｅｒ，简记为ＧＭ）为１个以上，平均每个林窗的ＧＭ为２．９个，同一林窗内的ＧＭ常常死于不同的时间。在所有调查的ＧＭ中，折断占６０％，而根拔和直立死亡分别为２８％和１２％ The interference system of small and medium size gaps in Picea-Abies forests in Bitahai, Yunnan Province was studied. The results showed that the gaps between gaps and gaps were 19% and 41%, respectively, with an average area of ​​44 m2 And 139m2, the formation of the gap is 0.005 ~ 0.007 / y. The estimated average gap length is 167 years. Most of the gaps (87%) made more than one gap-maker (GM), with an average GM of 2.9 in each gap and GM in the same gap often died At different times. In all of the GMs surveyed, the break was 60%, while the root and upright deaths were 28% and 12%, respectively