贵州南部桉树人工林生物量及碳储量研究

Biomass and Carbon Storage of Eucalyptus Artificial Stand

以贵州南部4年生桉树人工林为研究对象,通过样地实测生物量和采用重铬酸钾法测定植物和土壤碳素含量,建立了桉树林各器官生物量回归方程,并测定了碳储量及其空间分布特征。结果表明:桉树林分平均生物量为160.86 t/hm2,其中乔木层为157.1 t/hm2,占林分生物量的97.66%;桉树林分生态系统各组分碳含量为:树叶0.460 2 g/g,树枝0.451 5 g/g,树干0.478 5 g/g,树皮0.375 0 g/g,树根0.420 9 g/g,灌木层0.427 5 g/g,草本层0.407 1 g/g,枯落物层0.345 1 g/g;土壤碳含量随土层深度的增加而减少;桉树林分生态系统碳总贮量为172.29 t/hm2,其中乔木层68.68 t/hm2,占桉树林分生态系统总碳贮量的39.86%,灌木层0.22 t/hm2,占0.13%,草本层0.70t/hm2,占0.41%,枯落物层0.53 t/hm2,占0.31%,林地土壤碳贮量为102.16 t/hm2,占59.29%。

In this study,the biomass,carbon content,carbon storage and their vertical distribution were measured in 4 year old artificial stand of Eucalyptu,and the regression equations of eucalyptus forest of Biomass were established. The results showed that： the average biomass of eucalyptus stand is 160. 86 t /hm^2,in which the arbor layer is 157. 1 t/hm^2,accounting for 97. 66% of total biomass of eucalyptus stand. the carbon content of leaf,branch,stem,bark,roof,shrub layer,herb layer,litter layer is0. 4602,0. 4515,0. 4785,0. 3750,0. 4209,0. 4275,0. 4071,0. 3451 g C / g,respectively; the mean carbon content of soil is 0. 0128 g C / g,which reduces gradually with the depth. The total carbon storage of Eucalyptus Artificial stand ecosystem is 172. 29 t / hm^2,tree layer accounting for 39. 86%（ 68. 68 t/hm^2）,shrub layer accounting for 0. 13%（ 0. 22 t/hm^2）,herb layer accounting for 0. 41%（ 0. 70t/hm^2）,litter layer accounting for 0. 31%（ 0. 53 g t / hm^2）,soil layer accounting for 59. 29%（ 102. 16gt/hm^2）.