广东乳阳林场森林碳汇资源动态变化研究

Study on the Dynamic Change of Forest Carbon Sink in Ruyang Forest Farm, Guangdong Province

基于广东省乳阳林场2018年~2021年森林资源更新数据,采用蓄积量–生物量转换因子(BEF)法,分析了4个年度林场森林碳汇资源的动态变化。结果表明:4年中林场森林总面积略微减少(0.66%);森林总蓄积量有大幅度的增加,增加量达22.09万m3,4年间增幅为8.85%;碳储量由2018年的127.41万t增加到2021年的136.10万t,碳密度则由37.74 t/hm2增加到40.57 t/hm2;随着森林朝着正向演替方向发展,其碳汇速率呈现逐年下降的趋势,由3.62万t/a下降至3.47万t/a,年平均下降速率为1.02%。乳阳林场现以中幼林为主,具有强大的碳汇能力,应进一步加强森林保护,提高森林生态系统的稳定性和生态质量。

Based on the renewal forest resources data in Ruyang Forest Farm of Guangdong Province from 2018 to 2021, the dynamic changes of forest carbon sink by using biomass expansion factor (BEF) method were analyzed in this paper. The results showed that the total forest area of the Forest Farm decreased slightly (0.66%) in 4 years;and the total forest stock volume has increased significantly, with an increase of 22.90 ×104 m3, which is 8.85% in 4 years;the carbon storage in the Forest Farm was increased from 127.41 ×104 t in 2018 to 136.10 ×104 t in 2021, and the carbon density was also increased from 37.74 t/hm2 to 40.57 t/hm2. With the forest toward positive succession process, the carbon sink accumulative rate presents a downward trend year by year, from 3.62 ×104 t/a to 3.47 ×104 t/a, with an average annual decline rate of 1.02%. Ruyang Forest Farm is now dominated by young and middle-aged forests, with strong carbon storage potential. Forest protection should be further strengthened to improve the stability and ecological quality of the forest ecosystem.