炼山造林和捡带(不炼山)造林对杉木造林成活率及生长的影响

在信丰县油山营林林场采用炼山整地挖穴造林和捡带(不炼山)整地挖穴造林以及捡带(不炼山)边挖穴边种树3种不同方式营造杉木林,进行幼树生长、成活率、保存率对比试验。结果表明,在该立地条件下,不同造林方式在幼林的前两年对杉木幼树生长及成活率影响不显著。但捡带(不炼山)整地挖穴造林方式比炼山整地挖穴和捡带(不炼山)边挖穴边种两种处理费用分别高出25%和28.6%,而炼山整地挖穴造林和捡带(不炼山)边挖边种两种处理费用基本持平。因此把造林成本、水土保持效果和森林防火风险等因素考虑进去后,捡带(不炼山)边挖边种植是一种较好的选择。

Affect of Burning-afforestation and Non-burning-afforestation on the Plantation Survival Rate and Growth of Chinese Fir

Three different afforestation ways of Chinese fir were carried out in Youshan Forest Farm of Xinfeng County as follows： controlled burning with site preparation in hole; non-burning with site preparation in hole, as well as non-burning with site preparation while planting. The comparative test on sapling growth, survival rate, preservation rate was made. The results showed that under that site conditions, different afforestation ways have not significant effect on sapling growth and survival rate of fir at the first two years. But the processing cost for the afforestation way of non-burning with site preparation in hole was higher than controlled burning with site preparation in hole and non-burning with site preparation while planting for 25% and 28.6%, respectively. So the cost of controlled burning with site preparation in hole and non-burning with site preparation while planting was basically the same. Therefore, after taking the cost of afforestation, soil and water conservation effects, forest fireproof risk and other factors into account, the way of non-burning with site preparation while planting was a better choice.