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马尾松人工林生物量和生产力研究—— Ⅰ.不同造林密度生物量及密度效应
引用本文:丁贵杰.马尾松人工林生物量和生产力研究—— Ⅰ.不同造林密度生物量及密度效应[J].福建林学院学报,2003,23(1).
作者姓名:丁贵杰
作者单位:贵州大学造林生态研究室,贵州,贵阳,550025
基金项目:国家科技攻关项目,贵州省科技攻关项目 
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.

关 键 词:马尾松  人工林  生物量  密度效应

Study on Biomass and Productivity of Masson Pine Planting Stand Ⅰ.Biomass and Density Effect of Different Planting Density
Abstract:Based on the sample tree and plot cut method,biomass change characteristics and its allocation rules of 4 diffirent planting densities are analyzed for 12 year 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 decreasesThe biomass of undergrowth,herb layer,stand average tree and its organs decreases with stand density increasingStand biomass of tree stratum comes to 2378~8690 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 contraryBiomass percentage of stem,branch,root,leaf and bark is 54%~64%,1245%~2094%,1283%~1483%,670%~1077% and 769%~822% 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 101,224,87 and 60 t·hm-2(account for 424%,477%,153%,69%), suppressed tree 14,26,81 and 284 t·hm-2(61%56%,142%,327%)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 12 year 
Keywords:Masson pine  forest plantation  biomass  density effects
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