红松优质苗更新造林效果试验

Effect of Reforestation for Superior Pinus koraiensis Seedlings

通过选用红松优质苗进行更新造林试验,结果表明选择红松优质苗造林成活率能达到99.6%,优质苗比常规苗保存率提高10个百分点;栽后9a时树高生长量比常规苗提高28.5%,胸径生长量比常规苗提高13.5%,优质苗造林可使红松幼林提前2a郁闭;苗造林结实时间比常规苗能提前3-4a;林分整齐,离散度小,栽后15a,优质苗Ⅰ级木比常规苗提高31%,Ⅲ级木降低56%.

The reforestation experiments were conducted by selecting a superior Pinus koraiensis seedlings.Result shows that survival rate of afforestation can reach 99.6% by selecting superior Pinus koraiensis seedlings;preservation rate of superior seedlings increase by 10% higher than that of the conventional seedling;height growth of superior seedlings is 28.5% higher than that of the conventional seedlings after transplanting nine years;DBH growth increase by 13.5%than that of CK(conventional seedlings);planting with superior seedlings can advance 2afor canopy of Pinus koraiensis saplings;fruit time of seedlings can advance 3-4athan that of conventional seedlings,with neat stand and small dispersion;after transplanting 15 a,superior seedlings of I-grade stand increase by 31% than that of conventional seedlings,and that ofⅢ-grade decrease by 56%.