关键词: 毛竹林, 杉木人工林, 碳贮量, 土壤呼吸, 碳平衡

Abstract:

Based on the data from measurements of soil respiration and a survey of biomass, the carbon balance between assimilation and release was estimated in Moso Bamboo(Phyllostachys edulis) and Chinese Fir(Cunninghamia lanceolata) plantation. The results showed that: the carbon pool of the Moso Bamboo and Chinese Fir plantation was 144.3 and 152.52 t·hm^-2, respectively. The spatial distribution pattern of carbon stocks was basically consistent in the two forest ecosystems, in an order of soil layer > trees layer > shrub and herb and litter layer. In Moso Bamboo plantation, layer took soil (76.89%) > trees (22.16%) > standing litters (0.51%) > shrub and herb (0.41%) while in Chinese Fir plantation, soil (62.03%)>trees (34.99%)> standing litters (2.28%) >shrub and herb (0.70%). In general, the total assimilated CO₂ by gross primary production of Moso Bamboo and Chinese Fir plantation community was 38.87 and 26.95 t·hm^-2a^-1, respectively, while the total release of CO₂ from the systems was up to 24.35 and 15.75 t·hm^-2a^-1 respectively. Therefore, the carbon budget for Moso Bamboo and Chinese Fir plantation ecosystem had net acquisition which was estimated to be 14.52 and 11.21 tCO₂·hm^-2a^-1 or 3.96 and 3.07 tC·hm^-2a^-1, respectively.

Key words: Moso Bamboo plantation, Chinese Fir plantation, carbon storage, soil respiration, carbon balance