皖南黟县次生灌草丛生物量的研究

A STUDY ON THE BIOMASS OF SECONDARY SHRUB THICKET AND SHRUB-GRASSLAND IN Yl COUNTY OF ANHUI PROVINCE

本文对地处中亚热带的安徽黟县次生灌丛和灌草丛以及常绿阔叶幼林共9个样地的生物量进行了研究。结果表明:黟县常绿阔叶幼林、次生灌丛和灌草丛的地上部分为81.74、16.83和5.28t/ha。所调查的5个群落类型的地上部分生物量和生产力可回归成线性方程Y=3.88+0.14X,净生产力随生物量的增加而提高。

A research on plant biomass of subtropical secondary shrub thicket and shrub-grassland in Yi county of Anhui province has been carried out. By using direct harvest method the aboveground biomass of shrub thicket in six sample plots, two shrub-grassland and one evergreen broadleaf young forest was measured.The results show that the aboveground biomass of evergreen broadleaf young forest, secondary shrub thicket and shrub-grassland were respectively 61.74, 16.83 and 5.28 t/ha. By comparing with other community types, the secondary shrub thicket and shrub-grassland have lower biomass, and are less efficient to use the abundant natural resources of heat and water in subtropical zone.The following regression equation was derived from the correlation of aboveground biomass(X) and net production(Y): Y = 3.88 + 0.14X, and net production incresed with biomass.