摘要
[目的]探讨石漠化地区土壤活性有机碳库及土壤碳库管理指数对不同治理措施的响应,为喀斯特地区土地合理利用和石漠化生态治理提供科学依据。[方法]以喀斯特地区3种石漠化治理措施——梯田嵌套鱼鳞坑(NL)、鱼鳞坑(FSP)和梯田(TR)为研究对象,自然坡地为对照(CK),分析不同石漠化治理措施下土壤活性有机碳库及碳库管理指数分布特征。[结果]土壤活性有机碳含量和活性有机碳储量均在不同石漠化治理措施下总体呈鱼鳞坑最高,梯田嵌套鱼鳞坑次之,梯田最低的变化趋势,其中,鱼鳞坑土壤易氧化碳和可溶性碳含量及碳储量显著高于对照和其它石漠化治理措施。土壤碳库管理指数(CPMI)表现为鱼鳞坑措施大于其它2种石漠化治理措施,其中,石漠化治理措施在0~10 cm土层的土壤碳库管理指数均大于100.00%,表明石漠化治理措施提高了喀斯特地区表层土壤质量。[结论]石漠化治理措施显著影响了喀斯特坡地土壤活性有机碳储量。鱼鳞坑措施较梯田和梯田嵌套鱼鳞坑措施土壤活性有机碳储量和碳库质量明显提高。鱼鳞坑措施可作为喀斯特地区石漠化生态恢复优先考虑的治理措施。
[Objective]To explore the responses of soil active organic carbon pool and CPMI to different control measures in rocky desertification area and provide the scientific basis for rational land use and rocky desertification ecological management in karst area.[Method]Three typical measures for controlling rocky desertification in karst including Nested ladder(NL),Fish scale pit(FSP),and terrace(TR)were compared with CK(natural slope soils).The response of soil active carbon and carbon pool management index under different control measures was studied.[Result]The soil active organic carbon content and storage under different rocky desertification control measures showed a trend of the highest FSP,followed by the NL,and the lowest TR.The contents of EOC,DOC and pool storage showed that FSP were significantly higher than the other measures.The CPMI in FSP were all higher than NL and TR.The CPMI showed that the fish scale pit measure was greater than the other two rocky desertification control measures.The control measures improved the quality of the topsoil in the karst area.[Conclusion]This study suggests that different rocky desertification control can significantly affect the active organic carbon in karst.FSP is more beneficial to the active SOC fraction accumulation and the quality of carbon pool than other measures.FSP can be used as a priority measure for the ecological restoration of karst rocky desertification.
作者
李金垚
潘雯
王佳
薛亮
张显松
李生
LI Jin-yao;PAN Wen;WANG Jia;XUE Liang;ZHANG Xian-song;LI Sheng(Research Institute of Subtropical Forestry,Chinese Academy of Forestry,Hangzhou 311400,Zhejiang,China;Nanjing Forestry University,Nanjing 210037,Jiangsu,China;Puding Karst Rocky Desertification Ecosystem Research Station,Puding 562100,Guizhou,China;Forestry Bureau of Puding County,Guizhou Province,Puding 562100,Guizhou,China)
出处
《林业科学研究》
CSCD
北大核心
2022年第5期156-163,共8页
Forest Research
基金
国家重点研发计划项目(2016YFC0502605-3)
中央级公益性科研院所基本科研业务费专项资金项目(CAFYBB2020SY017)。
关键词
喀斯特
石漠化治理
土壤活性有机碳
碳库管理指数
karst
rocky desertification control
active organic carbon
carbon pool management index(CPMI)
