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长白山阔叶红松林实际林隙面积小于 2 5 0m2 的林隙数量占被调查林隙的 70 %以上 ,扩展林隙面积大部分分布在 1 0 0m2 ~ 5 0 0m2 之间 (70 %左右 ) ,林隙最大面积大部分分布在 3 0 0m2 ~ 90 0m2 之间 ,林隙模型所模拟的面积应在 5 0 0m2 ~ 90 0m2 之间。 4 0 %的阔叶红松林林隙是风干扰形成的。每个林隙的平均林隙形成木的数量是 2 .65株。最大林隙形成木集中分布在 5 0cm~ 60cm和 60cm~ 70cm两个径级内 ,占总数的5 0 %以上 ,红松、紫椴、蒙古栎和春榆在最大林隙形成木中占 95 %以上 ,其中紫椴 (4 0 % )所占比例最大 ,红松 (3 4 .5 % )次之。林隙内的树种更新密度比林冠下提高了 3 0 %左右。根据树种对林隙的反应可分为 4类 :鱼鳞云杉、水曲柳、青楷槭、白扭槭、假色槭对林隙无明显反应的树种 ;红松、臭冷杉、胡桃楸和色木槭对林隙反应中等 ;紫椴、裂叶榆和春榆对林隙有强烈反应 ;白桦、山杨、蒙古栎和落叶松需要强烈林隙干扰才能引起树种更新。
The actual number of gaps in the broad-leaved Korean pine forest in Changbai Mountain is less than 250m2, accounting for more than 70% of the total gaps in the surveyed gaps. Most of the expanded gap area is between 100m2 and 500m2 (about 70%), Most of the largest gaps are distributed between 300m2 ~ 900m2. The simulated area of the gap model should be between 500m2 ~ 900m2. 40% of the broad-leaved Korean pine forest gap is formed by wind disturbance. The average number of wood gaps per gap was 2.65. Largest gap formation wood concentrated distribution in the 50cm ~ 60cm and 60cm ~ 70cm two diameter classes, accounting for more than 50% of the total, Korean pine, Tilia amurensis, Quercus mongolica and spring elm in the largest gap formed 95 %, Of which Tilia (40%) accounted for the largest proportion, followed by Korean pine (34.5%). The regeneration density of tree species in the gaps is about 30% higher than under the canopy. According to the tree species response to the gap can be divided into four categories: fish scale spruce, ash, Cymbidium maple, Acer truncatula, false color maple gap reaction did not significantly tree species; Korean pine, Fir, Juglans mandshurica and Acer palmatum response to the gap in the middle; Tilia amurensis, Ulmus pumila and spring elm have a strong response to the gap; white birch, aspen, Quercus mongolica and larch need strong gap interference in order to cause species renewal.