贵州雷公山甜槠栲群落优势树种生物量研究

Study on the Biomass of Castanopsis eyrei Community Dominant Species in Leigongshan Mountain of Guizhou

为了探索贵州雷公山常绿阔叶林优势树种的生物量特征,在典型植被甜槠栲群落中通过样地调查核实了群落基本特征,并选取常绿优势树种甜槠栲、长蕊杜鹃,采用标准木法研究了其地上部分生物量分配特征及生物量模型。结果表明:雷公山甜槠栲群落内,甜槠栲单木树干、树枝、树叶生物量平均分别为12.96 kg、4.65 kg、2.08 kg,长蕊杜鹃相应生物量分别为15.85 kg、7.77 kg、1.64 kg;生物量分配上,甜槠栲各组分所占地上部分比例大小为:树干(53.21%)>树枝(23.84%)>树叶(12.68%),长蕊杜鹃为:树干(54.79%)>树枝(31.10%)>树叶(10.90%);生物量模型拟合显示,一元模型(W=aDb)与二元模型(W=a(D2H)b)在两树种干、皮、枝、叶各组分生物量拟合中都能满足精度需要,但单木地上部分总生物量的拟合则以二元模型的精度更高。

Abstract： In order to explore the biomass characteristics of dominant species of evergreen broad - leaved forest in Leigongshan mountain of Guizhou province, the basic characteristics of the typical vegetation Castanopsis eyrei （Champ.） Tutch. community was verified based on sample -plot survey, also two evergreen dominant species, i. e. , C. eyrei and R. stamineum, were chosed to research their biomass allocation characteristics and biomass mod- els. The results were summarized as follows. The biomass of stem, branch, and leaf of average single C. eyrei tree in the community were 12.96 kg, 4.65 kg, and 2.08 kg, respectively, and those of R. stamineum were 15.85 kg,7.77 kg, and 1.64 kg, respectively. The proportions of different components accounting for the whole aboveground biomass of individual C. eyrei were： tree stem （53.21%） 〉 tree branch （23. 84% ） 〉 tree leaf （12. 68%）, and those of R. stamineum were： tree stem （54.79%） 〉 tree branch （ 31.10% ） 〉 tree leaf （ 10. 90% ） . According to the biomass models fitting results, single - factor model （ W = aDb） and double - factor model （ W = a （D2H） b） could both satisfy the precision in the fitting of individual components＇biomass such as stem, bark, branch, leaf, but the precision of double - factor model was higher than single - factor model in fitting of the whole aboveground biomass. Key words： Leigongshan mountain; evergreen broad- leaved forest; Castanopsis eyrei-community; dominant spe- cies ; biomass characteristics