黄土高原子午岭人工油松林碳储量与碳密度研究

Artificial Pinus Tabulaeformis Carbon Storage and Density in Ziwuling Forest Area on the Loess Plateau

为准确估计子午岭林区人工油松林群落的碳库分配特征,运用湿烧法对该群落空间尺度上的碳储量及碳密度进行了估算,并分析了各层次碳储量分配特征。结果表明,人工油松林群落平均含碳率为0.4462,空间尺度上各层次差异显著;整个油松林碳储量为7.6498Tg(1Tg=106t),储碳密度为164.55t/hm2,各层碳储量依次为:土壤>乔木层>枯落物层>草本层>灌木层,从而呈现空间分配不均的特征。此外,子午岭人工油松林林龄在20a,生长进入中期,林相整体生长旺盛,此阶段若对林木实施规范的人工抚育管理措施,将使其具有较大的碳吸存潜力。

To accurately estimate carbon pool and features of artificial Pinus tabulaeformis in Ziwuling forest area, we use wet-burn method to account carbon storage and density on the spatial scale and analyze distribution characteristics at different levels. Results show that the mean carbon rate is 0. 446 2, but it is quite dif- ferent on spatial scale and has great significance between them. The total carbon storage is 7. 649 8 Tg and its density is 164.55 t/hm2. However, layers of carbon storage have the order of soil layer〉tree layer〉litter layer〉herb layer〉shrub layer, showing the uneven distribution of the characteristics on spatial scale. In addition, artificial Pinus tabulaeformis in Ziwuling forest area has grown for only about 20 years and still grows well. If efficient management measures are taken for artificial Pinus tabulaeforrnis, its communities will have a greater potential for carbon sequestration.