安徽省森林植被碳储量、碳密度动态及固碳潜力

Dynamic Characteristics of Forest Carbon Storage,Carbon Density and Carbon Sequestration Potential in Anhui Province

为了明确安徽省森林植被碳储量动态变化特征,基于安徽省1989-2014年6次森林资源连续清查数据,采用生物量-蓄积量转换函数,结合主要树种含碳率,估算了安徽省森林植被的碳储量、碳密度和固碳潜力。结果表明:安徽省森林植被碳储量由1989年的32.98×10^6 t C增加到2014年的85.72×10^6 t C,碳汇量为52.75×10^6 t C,年均增长率为4.06%,碳密度增加了8.51 t C/hm^2。乔木林是安徽省森林植被碳汇的主要贡献者,竹林次之,二者分别占安徽省森林植被碳汇的83.27%、13.41%,各林型平均碳密度大小顺序为竹林、乔木林、经济林、灌木林和疏林;不同龄组乔木林的碳储量大小顺序为中龄林、幼龄林、近熟林、成熟林和过熟林,且表现出林龄越大,碳密度越大的趋势;天然林植被碳储量略高于人工林;安徽省森林植被固碳潜力为35.67 t C/hm^2,栎类固碳潜力最大。因此,安徽省森林植被碳汇能力明显增强,但碳密度较低,加强科学经营管理至关重要。

Aiming at exploring the dynamic characteristics of forest carbon storage in Anhui Province,based on six forest inventory data in Anhui Province from 1989 to 2014,by means of the volume-derived biomass method and carbon concentration of existing forest types,the forest vegetation carbon storage,carbon density and carbon sequestration potential were estimated.The results showed that the forest carbon storage in Anhui Province increased from 32.98×10^6 t C in 1989 to 85.72×10^6 t C in 2014,the forest carbon sinks was 52.75×10^6 t C,and the average annual growth rate was 4.06%.The carbon density increased by 8.51 t/hm^2 during the six forest inventory periods.The arboreal and bamboo forests accounted for 83.27%and 13.41%of the total carbon sink,respectively,and the average carbon density of different forest types followed the sequence of bamboo forest>arbor forest>economic forest>shrub forest>open forest.The carbon storage of the arboreous forests of different ages ranked as order of middle-aged forest>young forest>premature forest>mature forest>over-mature forest,and it showed that the greater the age of forest,the greater the trend of carbon density.In addition,the average carbon storage was higher in the natural forest than in the plantation forest.The carbon sequestration potential in the forest reached 35.67 t C/hm^2 in 2014,with the highest value found in oak forest.The forests in Anhui Province showed high potential of carbon sequestration,but relatively low carbon density.Rational tending and management of the existing forests should be carried out to increase their carbon sink capacity.