摘要
定点观测研究表明，不同清理方式对迹地的水土流失及更新苗木的成活与生长有很大差异。对未清理、带堆清理和火烧清理作了比较试验。火烧清理方式造成的水土流失与养分流失都大大超过未清理和带堆清理，但坡度小于１６°时，尚不至造成严重的水土流失，坡度大于２３°时，应禁止采用火烧法，这是火烧不利的一面。有利的一面是有助于提高造林成活率和促进更新苗木的生长。不论哪种清理方式，苗木成活率均随坡度的增高而降低。
The fixed observation showed that soil and water loss and growth of the planted seedling with differentmethods were very discrepant on logged areas. The three methods of slash disposal in this experiment were no clear-ance, strip clearance and burning clearance. The results obtained from this study showed that the soil erosion, waterand nutrient loss were higher in burning clearance than those in no clearance and strip clearance. Soil and water losswas not serious when the slope of logged area was under 16°. Burning clearance could not be used when the slope wasover 23°. Survival rate of the planted seedling was higher and their growth was better in burning clearance plots thanin no clearance and strip clearance polts. No matter which methods of slash disposal, the seedling survival rate woulddrop along with the slope increacing.
基金
国家自然科学基金
