毛竹与油茶人工林生态系统碳贮量及其分配特征

对福州市主要经济林毛竹和油茶林生态系统各组分的生物量、含碳率和碳贮量进行比较研究,结果表明,毛竹林和油茶林乔木层生物量分别为277.18、35.76 t·hm-2,高于林下植被和凋落物生物量,其中,干的生物量最大,分别占乔木层生物量的68.80%和34.00%。毛竹林和油茶林地上部分含碳率分别在44.65%-48.84%、44.72%-49.78%之间,碳贮量分别为137.157、18.104 t·hm-2。林地土壤3个层次(60 cm)含碳率分别介于0.70%-3.02%、0.46%-2.46%之间,表层(0-20 cm)含碳率和碳贮量最高,毛竹和油茶林地土壤碳贮量为107.223、92.540 t·hm-2。毛竹林生态系统碳贮量为246.445 t·hm-2,油茶林为111.446 t·hm-2。

Study on carbon storage and spatial distribution in Phyllostachy pubescens and Camellia oleosa plantation ecosystem

The biomass,carbon content and carbon storage were studied in Phyllostachy pubescens and Camellia oleosa plantation ecosystem in Fuzhou. The results showed that the biomass of tree layer for P. pubescens and C. oleosa was 277.18 t·hm- 2and 35.76t·hm- 2respectively. The biomass of trunk was higher than other organs and accounted for 68.80% and 34.00% of tree layer biomass. The carbon content of vegetation layer ranged from 44. 65% to 48. 4% and from 44. 72% to 49. 78% respectively. Carbon storage were 137.157 t·hm- 2and 18. 104 t·hm- 2for non-timber product forestry of P. pubescens and C. oleosa ecosystem. The carbon concentration of soil to the depth of 60 cm ranged from 0.70% to 3. 02% and from 0. 46% to 2. 46%,with higher carbon concentration and storage in the soil of 0- 20 cm than in the other layer. The total carbon storage of non-timber product forestry of P. pubescens and C. oleosa ecosystem were 246.445 t·hm- 2and 111.446 t·hm- 2. Carbon storage of each composition for P. pubescens ecosystem was higher than C. oleosa,which was caused by different production and management mode.