摘要
【目的】为喀斯特区域的生态政策和生态补偿提供重要的科技支撑。【方法】采用空间代替时间的方法分析人工林和不同森林演替阶段的土壤固碳能力。【结果】与森林演替顶级阶段相比,人工林土壤固碳潜力较大;与年龄相近的演替初期生态系统比较,人工林能够快速地增加较深层(10~50 cm)土壤有机碳的含量;随着森林年龄的增加,表层(0~10 cm)土壤有机碳呈增加趋势,演替初级阶段土壤中的有机碳占37.96%,演替中期的占32.73%,演替顶级的占31.02%;人工林0~10 cm土层有机碳占26.26%。【结论】实施退耕还林进行人工造林能够较快地增加土壤有机碳的含量,而且能够增加较深土层的有机碳的含量。
【Objective】This study aimed to provide an important scientific support for ecological policies and compensation of karst region.【Method】A method of using spatial succession sequences instead of time was adopted in this study.【Result】 Compared with the maxiumum stage of forest succession, the potential of soil carbon sequestration in plantation is great. Compared with the early successional ecosystem, plantation can rapidly increase soil organic carbon content in soil deeper from 10 cm to 50 cm. In the initial stage of succession, organic car-bon accounted for 37. 96 % in surface soil, 32. 73 % , and in middle succession stage, 31. 02 % in succession climax and 26. 26 % in plantation forest.【Conclusion】A method of conversion of cropland to forest and artificial afforestation can increase the amount of organic car-bon, especially the deep soil.
出处
《西南农业学报》
CSCD
北大核心
2017年第11期2548-2551,共4页
Southwest China Journal of Agricultural Sciences
基金
国家自然科学基金项目(31660106)
中国科学院战略性先导科技专项(XDA05000000)
贵州省教育厅项目[黔教合KY字(2014)260]
遵义师范学院博士启动基金项目[遵师BS(2014)06和BS(2014)07]
贵州省千层次创新型人才[遵市科合人才(2016)4]
关键词
演替阶段
土壤有机碳
森林
喀斯特
人工林
Succession stages
Soil organic carbon
Forest
Karst
Forest plantation
