植被恢复对侵蚀退化红壤碳吸存的影响  

Effects of Vegetation Restoration on Carbon Sequestration in Degraded Red Soil

作　　者：谢锦升[1] 杨玉盛[2] 解明曙[1] 黄石德[3] 钟炳林 岳辉 

机构地区：[1]北京林业大学水土保持学院,北京100083 [2]福建师范大学地理学院,福建福州350007 [3]福建农林大学林学院,福建福州350002 [4]福建省长汀县水土保持局,福建长汀366300

出　　处：《水土保持学报》2006年第6期95-98,123,共5页Journal of Soil and Water Conservation

基　　金：福建省自然科学基金资助项目(D0510021)

摘　　要：侵蚀退化土壤具有较大的碳吸存潜力，恢复我国大面积退化土壤对增加碳汇具有重要意义。在长汀县河田镇研究了侵蚀退化裸地恢复为马尾松、板栗园和百喜草地后土壤有机碳库的变化，试图揭示植被恢复对土壤有机碳垂直分布的影响，以及侵蚀退化红壤在植被恢复过程中碳吸存潜力和速率。裸地的土壤有机碳含量和储量极低，垂直分布变化不明显；而植被恢复显著增加了土壤的有机碳古量和储量，0～5cm土层受植被恢复影响最大，40cm以下土层深度受植被恢复的影响很小，0～20cm土层是储存有机碳的主要层次。以次生林为参照，裸地土壤的碳吸存潜力为56t／hm^2，而植被恢复后土壤仍约有30～44t／hm^2的吸存潜力。马尾松林、板栗园和百喜草地0～100cm土层土壤碳吸存量分别为25．234t／hm^2，11．418t／hm^2和15．394t／hm^2，年平均碳吸存速率分别为1．06t／（hm^2·a）．1，90t／（hm^2·a）和3．08t／（hm^2·a）．短期碳吸存速率高于长期碳吸存速率。There are vast areas of eroded degraded soil in China. The restoration of degraded soil plays important role to increase carbon sink because of higher carbon sequestering potential in degraded soil. This paper investigated the changes of soil organic carbon （SOC） pools from eroded bare land conversion to Pinus massoniana forest, Castanea mollissima plantation and Paspalum notatum Flugge grassland respectively by ecological restoration, intended to reveal the effects of vegetation restoration on vertical distribution of soil organic carbon in soil profile and the potential and rate of carbon sequestration in eroded red soil during vegetation restoration. SOC content and pool were small and did not a distinct change for vertical distribution in bare land, and an obvious increase occurred after vegetation restoration, especially in the 0-5 cm depth, but little affected under the depth of 40cm. Carbon pool in 0-20cm soil layer was the major for 0- 100cm soil profile. If secondary forest been a frame of reference, soil carbon sequestration potential was about 56 t/hm^2 in bare land, and was about 30-44 t/hm^2 in Pinus massoniana forest, Castanea mollissima plantation and Paspalum notatum Flugge grassland. The amount of soil carbon sequestration was 25. 234 t/hm^2, 11. 418 t/hm^2 and 15. 394 t/hm^2 respectively in above three lands, and rate of soil carbon sequestration was 1.06 t/（hm^2·a） , 1.90 t/（hm^2·a） and 3.08 t/（hm^2·a） respectively. Short-term rate of carbon sequestration was higher than long-term rate in soil.

关 键 词：土壤有机碳 植被恢复 碳吸存 退化红壤 土壤侵蚀 

分 类 号：S157.2[农业科学—土壤学] S153.61[农业科学—农业基础科学]