鄂西地区杉木林生物量模拟及其分配格局

笔者研究杉木的生物量及其分布格局对研究鄂西地区植被碳循环具有重要意义,以杉木生物量为研究对象,利用在鄂西地区样地每木调查的资料,建立了不同器官生物量预测模型,统计分析了不同杉木林分的乔木层生物量及其组成关系;通过对样品含水量的测定,统计分析出不同林分灌木层和枯落物的生物量;杉木林各器官生物量模型分别为:W树干=0.010 0(D2 H)1.036 6;W树皮=0.013 5(D2 H)0.787 1;W树枝=1.223 0(D2 H)0.257 3;W树叶=0.851 1(D2 H)0.258 7;W地下=0.031 1(D2 H)0.736 7;W地上=0.070 7(D2 H)0.854 3;W总=0.094 2(D2 H)0.838 3。结果表明杉木林生物量主要集中于乔木层,各部分所占比例为:干(52%)>地下(15%)>枝(14%)>叶(10%)>皮(9.6%),灌木层和枯落物的生物量比较少。

Study on the Biomass and Distribution Pattern of Cunninghamia lanceolata （Lamb.）Hook. in Western of Hubei

The authors studied on biomass and distribution of Cunninghamia lanceolata（Lamb.）Hook.on the significance for carbon cycle in western of Hubei.The biomass of Cunninghamia lanceolata（Lamb.）Hook.in western of Hubei was the investigative target.Predicted models of the biomass for different organs were established and the biomass of tree layer as well as its components in different stands were analyzed basing on the statistics of sample plot survey.The biomass of shrub and litter layer in different stands were analyzed through determining the water content in the samples,and finally the total biomass and its distribution rule and pattern were calculated.The results are summarized as follows,the biomass mode of Cunninghamia lanceolata（Lamb.）Hook.were Wtrunk=0.010 0（D2H）1.036 6;Wbark=0.013 5（D2H）0.787 1;Wbranch=1.223 0（D2H）0.257 3;Wleaf=0.851 1（D2H）0.258 7;Wroot=0.031 1（D2H）0.736 7;Waboveground=0.070 7（D2H）0.854 3;Wtotal=0.094 2（D2H）0.838 3.The biomass of Cunninghamia lanceolata（Lamb.）Hook.were mainly concentrated on arbor layer,in which the proportion of each part is that wood（52%） root（15%） branch（14%） leaf（10%） bark（9.6%）,while the biomass in shrub and litter layer are comparatively little.