Carbon sequestration contribution of shelterbelt in Yunnan province and countermeasures for increasing sinks
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摘要: 基于七次全国一类森林资源清查数据和云南省二类森林资源清查数据，采用生物量转换因子法，核算云南省防护林固碳贡献。结果表明如下。（1）云南省防护林碳储量由1988年的8868.03万t增加到2018年的37635.01万t，年均增长量为821.91万t，防护林碳储量对于云南省森林总碳储量的贡献率由17.59%增加到41.63%，防护林总平均碳密度在波动中呈上升趋势。（2）从不同龄级角度分析，中龄林碳储量贡献率（20.20%-27.44%之间）最大，幼龄林碳储量贡献率最低；防护林总平均碳密度随龄级增加而增加，成熟林和过熟林碳密度随时间有所下降。（3）从不同起源角度分析，天然防护林是云南省防护林碳储量的主要贡献者，其贡献率（95.80%-99.53%之间）逐期下降，天然防护林碳密度随龄级增加而增加；人工防护林碳储量、碳密度相比于天然防护林处于较低水平，人工防护林总平均碳密度呈上升趋势，不同龄级人工防护林碳密度表现为成熟林>近熟林>过熟林>中龄林>幼龄林。（4）从地域角度分析，迪庆州是云南省防护林碳储量的主要贡献者（贡献率为17.65%），滇西北部地区防护林固碳量占云南省防护林固碳总量的44.19%。云南省应该注重中幼龄防护林的顺利成熟，加强人工防护林的经营管理，提升云南防护林的碳储能力。Abstract: Based on the data of seven national forest resources inventory and second-class forest inventory in Yunnan province, the contribution of carbon sequestration of shelterbelt in Yunnan province was calculated by biomass expansion factor method. The results show that as follows.(1) The carbon storage of shelterbelt in Yunnan province increased from 88,680,300 t in 1988 to 376,350,100 t in 2018, with an average annual growth of 8,219,100 t, the contribution rate of shelterbelt carbon storage to the total forest carbon storage in Yunnan Province increased from 17.59% to 41.63%, and the total average carbon density of shelterbelts showed an upward trend in fluctuation.(2) From the perspective of different age levels, the contribution rate of carbon storage in middle-aged forests(between 20.20% and 27.44%) was the largest, while that in young forests was the lowest; the total average carbon density of shelter forest increased with the increase of age class, and the carbon density of mature forest and over-mature forest decreased with time.(3) From the perspective of different origins, the natural shelter forest was the main contributor to the carbon storage of shelter forest in Yunnan province, and its contribution rate(between 95.80% and 99.53%) decreased gradually, while the carbon density of natural shelter forest increased with the increase of age; compared with natural shelterbelt, the carbon storage and density of artificial shelterbelt was at a low level, and the total average carbon density of artificial shelterbelts was on the rise. The carbon density of artificial shelterbelt of different age classes was mature forests > near-mature forests > over-mature forests > middle-aged forests > young forests.(4) From a geographical point of view, Diqing prefecture was the main contributor of carbon storage of shelterbelt in Yunnan province(the contribution rate is 17.65%), and the carbon sequestration of shelterbelt in northwest Yunnan accounts for 44.19% of the total carbon sequestration of shelterbelt in Yunnan province. Yunnan province should pay attention to the smooth maturity of middle-aged and young shelterbelt, strengthen the management of artificial shelterbelt, and enhance the carbon storage capacity of Yunnan shelterbelt.
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Keywords:
- shelterbelt /
- carbon storage /
- carbon density /
- Yunnan province
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