试论大窝铺天然油松异龄林林分结构及经营对策

本文根据对平泉县柳溪乡大窝铺村第17小班天然油松林的调查结果,认为该小班达到了法正异龄林标准,株数按径级分布基本是倒“J”形分布,小、中、大径级组蓄积量之比大体为1:1:1,小班平均每公顷蓄积量为190m~3,连年生长量5.1m~3,单位面积蓄积量接近法正异龄林标准;提出经营措施应着眼于维护并改善复层异龄结构,可采用经营择伐作业,或综合疏伐作业。

ON THE STAND STRUCTURE AND MANAGEMENT COUNTERMEASURES OF NATURAL UNEVEN AGED CHINESE PINE FOREST IN DAWOPU VILLAGE

The inventory results of natural Chinese pine forest in No.l7 sub-compartment in Dawopu village, Pingquan County, Hebei Province showed that this sub-compartment has reached the standard of normal uneven-aged stand. The ditribution of tree numbers over the diamer classes took the shape of reversed "J". The ratio of volumes in big, middle and small diamer classes was 1:1:1 .The average volume per hactare of the sub-compartment was 190m3,current annual increment was 5.1m3. And the volume per unit area was close to the standard of normal uneven aged forest. So the management measures for the forest should be focused on maitaining and improving the multi-storied uneven aged stand through management selection cutting or combined thinning.