摘要
研究4种12年生不同造林密度试验林的生物量变化特点及其分配规律.结果表明:林分及各器官生物量均随密度增加而增加,但当林分密度大于1800株/hm2后,增加速度减缓.下木层、草本层、林分平均木及其各器官生物量,随密度增加而降低.乔木层林分生物量23.78～86.90t/hm2,占群落生物量96%以上.树干、树皮和根所占比例,随密度增加而增加,枝、叶刚好相反;树干生物量占54%～64%,枝占12.45%～20.94%,根占12.83%～14.83%,叶占6.70%～10.77%,皮占7.69%～8.22%.造林密度由稀到密,生物量所占百分比,大径级木分别为42.4%、47.7%、15.3%、6.9%,小径级木分别为6.1%、5.6%、14.2%、32.7%.培育纸浆材林的造林密度可定为3600～4500株/hm2,12年时3000～4050株/hm2.
Based on the sample tree and plot cut method,biomass change characteristics and its allocation rules of 4 diffirent planting densities are analyzed for 12year Masson pine(Pinus massoniana)density experimental forest of middle site(SI=15～16)The results show that the stand density has a great influence on biomass and its allocation rules,biomass of stand and organs increases with stand density increasing,but when stand density is more than 1 800 tree·hm-2,the increasing rate decreasesThe biomass of undergrowth,herb layer,stand average tree and its organs decreases with stand density increasingStand biomass of tree stratum comes to 2378～8690 t·hm-2,accounting for over 96% the community biomass,biomass percentage of stem,bark and root decreases with stand density increasing,banch and leaf on the contraryBiomass percentage of stem,branch,root,leaf and bark is 54%～64%,1245%～2094%,1283%～1483%,670%～1077% and 769%～822% individually,percentage of root and bark is relative stability When stand density from sparse to thick,the vertical allocation of the biomass in tree stratum is:dominant tree 101,224,87 and 60 t·hm-2(account for 424%,477%,153%,69%), suppressed tree 14,26,81 and 284 t·hm-2(61%56%,142%,327%)Planting density of silivization pulp wood may adopt 3 600~4 500 tree·hm-2,stand density is kept 3 000~4 050 tree·hm-2 in the 12year
出处
《福建林学院学报》
CSCD
北大核心
2003年第1期34-38,共5页
Journal of Fujian College of Forestry
基金
国家"九五"重点攻关科学基金资助项目(96-11-01-01)
贵州省"九五"攻关科学基金资助项目(黔19971112).
