摘要
在杉木分布北缘的苏南低山丘陵试验研究表明,利用萌芽杯幼龄速生的阶段优势,能发掘短轮伐小径材的生产潜力。影响萌芽林生长的因素主要有更新林分种源的遗传特性,立地条件,伐桩密度与更新方式。在山洼、山谷阴坡坡脚等优良立地,实施2250~2400株/桩·hmt2密度控制,小块状更新,集约肥培管抚,9年生萌芽林蓄积量达118.2~126.7m2/hm2,可产出约85%的小径材.在山坡中下部中等立地条件,实施较高密度(3000~3300株/桩·hm2)控制,窄带状(8~10m宽)更新,集约管抚,9~15年生蓄积量达111.7~139.6m3/hm2,可产出约40%的小径材和农用椽材。而在较差岗坡立地,即使采取高密度(4500株/桩·hm2:),窄带状荫芽更新与高水平集约管抚,也无生产小径材的可能。
Experiinental results in the hilly mountains of
jiangsu indicated that using the superior of sprout replant plantion of C hinese fir could
increase the produc-tive capacity of small diameter timber by shoit rotation. The factors
affecting the growth of sprout plantation mainly were the provenance of replant forest,site
condition,replant method , and stump density,By the means of small block replant and
intensiye management in good site condition,the volume of 9 yea-rs old Sprout plantation could
reach 118.2-126.7m3 /hm2,with the density con-trol of 2250-2400 plant or stump/hm2,which the
small diameter timber was 85%.The narrow belt-shaped replant (8-10m widtli)and 3000-3300
plant or stump/hm2in the middle site the volume of 9-15 years old one was
111.7-139.6m3/hm2,with 40%small diameter timber and rafter,However,in the bad site,even if
the high density(4500 plant or stump/hm2),narrow belt-shaped replant,and goodintensive
management were aplied,the probality of small diameter prcductionwas not existed .
出处
《江苏林业科技》
1994年第4期1-6,共6页
Journal of Jiangsu Forestry Science & Technology
基金
江苏省科委下达的农业基金
关键词
杉木
短轮伐
萌芽更新
立地条件
种源
伐桩密度
Cunninghamia lanceolata
Short rotation
Sprout replant
Stump density,Intensive management