黄土高塬沟壑区小流域植树造林固碳增汇效益研究  

Study on the Carbon Sequestration and Sink Enhancement Benefits of Afforestation in Small Watersheds in the Gullied Loess Plateaus

作　　者：曹丹 陈峰峰 贾易周 段彤 党小尼 李超 CAO Dan;CHEN Fengfeng;JIA Yizhou;DUAN Tong;DANG Xiaoni;LI Chao(Xifeng Management Supervision of Soil and Water Conservation in the Yellow River,Qingyang 745000,China)

机构地区：[1]黄河水土保持西峰治理监督局,甘肃庆阳745000

出　　处：《人民黄河》2024年第11期121-125,共5页Yellow River

基　　金：国家自然科学基金资助项目(42177323);甘肃省自然科学基金资助项目(24JRRM010)。

摘　　要：为定量评估水土保持植树造林措施的固碳增汇效益,并为全面定量评估水土保持碳汇效益等提供参考依据,以黄土高塬沟壑区杨家沟小流域(水土保持综合治理小流域)和与其毗邻的董庄沟小流域(未治理对比小流域)为研究区,基于遥感影像解译,明晰各土地利用类型尤其人工林地的分布状况及面积等,通过野外调查采样,测算杨家沟小流域人工林地与董庄沟小流域天然草地碳储量,并估算潜在碳汇量及其碳汇价值。结果表明:1)杨家沟小流域人工林地的碳储量为10516.10 t、碳密度为150.23 t/hm^(2),董庄沟小流域天然草地的碳储量为132.10 t、碳密度为2.28 t/hm^(2);2)杨家沟小流域约70 a来的水土保持植树造林使碳储量增加约10356.50 t,换算成碳汇量为38008.36 t,碳汇密度约为542.98 t/hm^(2);3)杨家沟小流域水土保持植树造林措施的单位面积碳汇效益为1.0万~3.5万元/hm^(2),潜在碳汇价值为68.59万~244.20万元。In order to quantitatively evaluate the carbon sequestration and sink enhancement benefits of afforestation measures for soil and wa-ter conservation and provide reference for comprehensive quantitative evaluation of soil and water conservation carbon sink benefits,the Yangjiagou small watershed in the gullied loess plateaus(a comprehensive management small watershed for soil and water conservation)and its adjacent Dongzhuanggou small watershed(an untreated check small watershed)were taken as the research area.Based on remote sensing image interpretation,the distribution and area of each land use type,especially artificial forest land,were clarified.Through field investiga-tion and sampling,the carbon storage of artificial forests in the Yangjiagou small watershed and natural grasslands in the Dongzhuanggou small watershed were calculated,and the potential carbon sink amount and carbon sink value were estimated.The results show that a)the carbon storage of artificial forest land in Yangjiagou small watershed is 10516.10 t and the carbon density is 150.23 t/hm^(2),while the carbon storage of natural grassland in Dongzhuanggou small watershed is 132.10 t and the carbon density is 2.28 t/hm^(2);b)the afforestation for soil and water conservation in the Yangjiagou small watershed for about 70 years has increased carbon storage by about 10356.50 t,which is e-quivalent to a carbon sink of 38008.36 t and a carbon sink density of about 542.98 t/hm^(2);c)the carbon sequestration benefits per unit area of afforestation measures for soil and water conservation in the Yangjiagou small watershed are 10000-35000 yuan/hm^(2),and the potential carbon sequestration value is 685900-2442000 yuan.

关 键 词：植树造林 碳储量 碳汇价值 杨家沟 董庄沟 黄土高塬沟壑区 

分 类 号：S157[农业科学—土壤学] S727.22[农业科学—农业基础科学] X82[环境科学与工程—环境工程]