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依据2012年重庆市森林资源二类清查资料,结合外业调查数据,计算得出重庆市彭水县森林生态系统年固碳2 606 053.80t,年释氧1 930 410.23t,其固碳价值为36.190 3亿元,释氧价值为19.304 1亿元,固碳释氧总价值为55.494 4亿元。彭水县森林生态系统固碳释氧主要集中在林木层,约占其固碳释氧量的79.28%,其次为土壤,约占20.43%,地被植物仅占0.29%。林木固碳释氧量中,针叶树固碳释氧占93.8%,阔叶树仅占6.2%。结论:彭水县森林生态系统总体服务价值相对较高,但存在针叶、阔叶乔木固碳释氧比例严重失衡的现状。
Based on the second-class inventory data of forest resources in Chongqing City in 2012 and the field survey data, the annual carbon sequestration in Pengshui County of Chongqing Municipality was 2 606 053.80t and 1 930 410.23t respectively. The carbon sequestration value was 36.190 300 million yuan, oxygen release value of 19.304 100 million yuan, total carbon fixation and oxygen release value of 55.494 4 billion yuan. Carbon fixation and oxygen release in forest ecosystem of Pengshui County mainly concentrated in the forest layer, accounting for 79.28% of the carbon fixation and oxygen release, followed by soil, accounting for 20.43% and only 0.29% of ground cover plants. Among the carbon fixation and oxygen release of coniferous trees, coniferous carbon fixation and oxygen release accounted for 93.8% and broadleaf trees only accounted for 6.2%. CONCLUSION: The overall service value of forest ecosystem in Pengshui County is relatively high, but there is a serious imbalance in the ratio of carbon sequestration and oxygen release among coniferous and broad-leaved trees.