摘要
对杉木－火力楠混交林进行４种间伐强度试验表明，间伐６年后各林分的杉木、火力楠胸径净生长量比对照分别增加７０—１３９、１１—２５％，树高增加４６—９０、７—１０％，村积生长增加５４—１４０、１０—４３％，林分蓄积量增加４９—７５ｍ３·ｈａ（－１），平均冠高增加２—６、８一１３％，第１活枝高下降０．５—３、３５—４８％。冠幅杉木下降１—２％、火力楠增加１—８％．可以认为，以间伐强度为３０和４０％２种方式较好，间伐后林分定型株数约保留在１６００—２２００株·ｈａ（－１）之间为宜．
years experiment on four thinning intensities of Cunninghamia lanceolata and Micheliameclurri mixed forest shows that in comparing with control, net growth of DBH for C.lanceofata and M. maclurei is respectively by 70-139% and 11 25%,height by 46-90and 7 10%, volume by 54-140 and 10-43%, mean crown height by 2 6 and 8 13%, growing stock of the stand by 49 75m3. ha-1. The height of first living branch isdecreased by 0. 5 3 and 35 48%,but crown width by 1 2% for C. lanceofata,and by1 8% for M. maclurri. Therefore,it is considered that the thinning intensities of 30%and 40% are better than others,and the remainning trees are 1600 2200plant·ha(-1)
出处
《应用生态学报》
CAS
CSCD
1995年第3期231-236,共6页
Chinese Journal of Applied Ecology
基金
广西林业厅科研基金
关键词
混交林
间伐强度
生长量
杉木
火力楠
Mixed stand, Thinning intensity, Increment, Cunninghamia lanceolata,Michelia maclurei.
