Biomass and net productivity of Quercus variabilis forest in Baotianman Natural Reserve

Abstract

Abstract: Determinations of a 45 years old natural secondary Quercus variabilis forest in Baotianman Natural Reserve in Neixiang County, He'nan Province show that its biomass was 167.6417t·hm^-2, 94.75% of which was the tree layer, and its net productivity was 8.4880t·hm^-2 ·yr^-1, in which, the tree layer was 7.9254t·hm^-2 ·yr^-1 .The average relative growth rate of biomass was 0.041.The biomass and net productivity of shrub layer were 0.0694t·hm^-2 and 0.0456t·hm^-2 ·yr^-1, respectively, while those of herb layer were 0.1041t·hm^-2 and 0.0908t·hm^-2 ·yr^-1, respectively.The standing storage of litter was 8.63t·hm^-2, and the yearly litter was 5.0395t·hm^-2 ·yr^-1, which were respectively 5.15% of total biomass and 59.37% of total net productivity.The net production had a positive correlation with leaf area index(LAI)and leaf biomass, but a negative correlation with leaf efficiency.

Key words: Quercus variabilis forest, Biomass, Net productivity, Baotianman Natural Reserve, photosynthetic production, plant type, simulation model, light distribution, double cropping rice

Liu Yucui, Wu Mingzuo, Guo Zongmin, Jiang Youxu, Liu Shirong. Biomass and net productivity of Quercus variabilis forest in Baotianman Natural Reserve[J]. Chinese Journal of Applied Ecology, 1998, 9(6): 569-574.

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