四川低海拔区杉木萌生林经营前景研究

The Prospects of Managing Chinese Fir Sprout Forest in Lower-altitude Areas in Sichuan

通过对四川省低海拔区杉木萌生林生长特点的萌生林生长特点的的分析，确定在中、上立地条件下，杉木第一代萌生林的成熟龄在１４～１６年左右．从胸径和树高生长看，第一代萌生林以留萌一株为好，但从单位面积蓄积看，以留萌两株为佳．在距地面高度不大的情况下，不同的采伐方式和伐桩高度对萌生林生长影响不大．一代萌生林的木材力学性质与全国同年龄实生杉木的性质十分接近．详细的经济分析表明，在低海拔地区经营第一代杉木萌生林具有良好的前景．

The growing characteristics of Chinese fir sprout forest in lawer-altitude areas in Sichuan were analysed. The quantitative maturity age of this foreSt is 14-18 years. According to DBH and height,it is the best choice to keep one sprout for each stump. But according to volume in unit area,two SProuts kept on each stump is more reasonsble. There is no obvious influence on young sprouts with different cutting methods and different stump height. The phyaical properties of wood from seedling crop(aged 15) and that from sprout (aged 14)are nearly the same. Economical analysis has shown that the prospect is magnificient for the management of Chinese fir sprout forests.