间伐对楠木杉木混交林生长影响的研究

采用2个处理4次重复的完全随机区组设计对楠木与杉木混交林进行间伐试验研究,结果表明,间伐有利于楠木生长,间伐林分楠木平均胸径、树高和单株材积分别为不间伐的177.4%、120.8%和361.5%,间伐楠木林分蓄积量为74.23 m3.hm-2,不间伐楠木蓄积量为24.88 m3.hm-2,间伐楠木受光条件好,林木树冠大,生长好;间伐有利于楠木林下植被的生长,间伐林分林下植被生物量为9702.0 kg.hm-2,不间伐林分为3221.5 kg.hm-2,间伐林分为不间伐林分的301.2%;间伐后楠木林分的凋落物量有所减少,间伐林分凋落物量为2463.8 kg.hm-2,不间伐林分为3600.0 kg.hm-2,间伐林分为不间伐林分的68.4%。

Study on the effect of thinning on the growth of mixed forest of Phoebe nanmu and Cunninghamia lanceolata

Thinning experiments were taken in the mixed forest of Phoebe nanmu and Cunninghamia lanceolata according to complete randomized block design of two treatments and four replications.The results showed that thinning benefited the growth of P.nanmu and the undergrowth vegetation because the plants grew well with better sunshine.The average D B H,tree height and individual volume of thinning P.nanmus were 177.4%,120.8% and 361.5% of not-thinning forest respectively.And the stand volume of the former was 74.23 m3·hm-2,while the latter was 24.88 m3·hm-2.The undergrowth biomass of thinning was 9702.0 kg·hm-2,which was 301.8% of non-thinning that was 3221.5 kg·hm-2.The litter fall,which decreased after thinning,was 2463.8 kg·hm-2 of thinning and 3600.0 kg·hm-2 of non-thinning respectively.The former was 68.4% of the latter.