植被恢复过程中芒萁对侵蚀红壤碳氮库的影响  

Effects of dicranopteris dichotoma on soil organic carbon and soil total nitrogen during revegetation process in red soil erosion area

作　　者：陈坦 江军 杨燕华 吕茂奎 胥超 付林池 杨玉盛 谢锦升[1,2] 

机构地区：[1]湿润亚热带山地生态国家重点实验室培育基地,福建福州350007 [2]福建师范大学地理研究所,福建福州350007

出　　处：《南昌工程学院学报》2014年第4期23-27,共5页Journal of Nanchang Institute of Technology

基　　金：国家自然科学基金资助项目(31370465);973计划前期专项课题(2012CB722203)

摘　　要：选择未治理地、治理10 a与30 a的马尾松林为研究对象,对比林下有芒萁覆盖(MQ)与林下裸露地(CK)土壤碳氮储量的差异.结果表明,未治理地芒萁覆盖度和生物量均很低,治理10 a和30 a的马尾松林下芒萁覆盖度和生物量显著增加.各林地芒萁覆盖下的土壤(1 m)有机碳、氮储量均显著高于林下裸露地(P<0.05);治理10 a和30 a马尾松林土壤有机碳、氮储量分别比未治理地增加了153%和296%、24%和101%;治理后芒萁覆盖下的土壤有机碳积累快于氮的积累,总体上芒萁覆盖的土壤C/N均高于林下裸露地.以上结果显示了芒萁对侵蚀红壤区土壤有机碳的恢复和氮素积累具有重要影响.Dicranopteris dichotoma is the most important understory vegetation in the eroded area of red soil in southern China,but its contribution to the accumulation of soil organic carbon（SOC）and soil total nitrogen（STN）is poorly understood. In this study,this paper quantifies SOC and STN storage between D. dichotoma-covered soil（MQ）and soil without D. dichotoma coverage（CK）in a severely eroded land and two Pinus massoniana plantations（PM）（10-year-old and 30-year-old）. Results show that：The cov-erage and biomass of MQ sees the lowest in the severely eroded land,but it increases significantly in 10-year-old and 30-year-old Pinus massoniana. The SOC and STN storage of MQ treatment are significantly higher than those in the bare land of CK（P ﹤ 0. 05）. Compared to severely eroded land,SOC storage in-crease by 153% and 296% in 10-year-old and 30-year-old Pinus massoniana,respectively,and the figure for STN is 24% and 101% . Such results imply that the accumulation rate of SOC is faster than that of STN with Pinus massoniana treatment,and the C：N ratio is generally higher with MQ covered than in bare land. In conclusion,D. dichotoma has a significant effect on SOC and STN accumulation in red soil erosion regions.

关 键 词：芒萁 土壤有机碳 土壤全氮 植被恢复 侵蚀红壤 

分 类 号：S714.1[农业科学—林学]