桤木薪炭林群落学特征及生物量的研究

本文对桤木人工薪炭林群落学特征做了分析,桤木薪炭林是人工造林配置的树种,故群落简单。对估测桤木人工薪炭林乔木层生物量建立了多个数学模型,选用W_(树干)=147.1914D~(2.0616)、W_(枝条)=37.5577D~(2.3962)、W_(叶)=31.0578(D~2H)~(0.7776)和W_(地上部分)=258.6222D~(2.0622)幂函数方程,分别获得各器官的生物量,树干重8895.720kg/ha,枝条重3657.651kg/ha,叶重3345.324kg/ha,乔木层地上部分总重量15898.696kg/ha。对林下灌木和草本植物采用收割法测定,灌木地上部分生物量为2265kg/ha,草本植物地上部分生物量为459kg/ha。所以桤木人工薪炭林的地上部分生物量为18622.696kg/ha。

A Study of Community Features and Biomass of Alnus cremastogyne Fuelwood Forests

In line with analysis of the features of artificial Alnus cremastogyne forests,it is thought that the community is simple because Alnus cremastogyne fuelwood forests are composed of artificially arranged species. Several mathematic models have been set up for the calculation of the biomass of their arbor layers. According to such power equations as W_(trunk) = 147. 914D~(2.0616), W_(branch) = 37. 5577D~(2.3962), W_(leaf)= 31. 0578(D~2H)~(0.7776) and W_(aboveground part) = 258. 6222D~(2.0622),the biomass of each organ is calculated as follows.trunks weigh 8895. 720kg/ha,branches 3657. 651kg/ha,leaves 3345. 324ka/ha,andthe aboveground part of arbor layer 15898. 696kg/ha in total. The harvest method was used for the determination of underbrush and herbs. The results were the foliowing: the biomass of the aboveground part of brush was 2265kg/ha while that of herbs was 459kg/ha. And therefore the biomass of the aboveground part of artificial A. cremastogyne fuelwood forests should be 18622. 696kg/ha.