凋落物输入不同处理对暖温带麻栎林表层土壤有机碳的影响  

Effect of Different Litter Input Treatment on Organic Carbon Content of Ground Soil in Quercus acutissima Forest in Warm Temperate Zone

作　　者：韩中海[1] 詹超[2] 史贝贝[3] 王璐[1] 罗会平 许乾增 Han Zhonghai;Zhan Chao;Shi Beibei;Wang Lu;Luo Huiping;Xu Qianzeng(Administration Center of Returning Farmland to Forest Project and Natural Forest Protection,Zhengzhou 450003,China;Henan Wildlife Rescue and Rehabilitation Center,Zhengzhou 450044,China;College of Forestry,Henan Agricultural University,Zhengzhou 450002,China)

机构地区：[1]河南省退耕还林和天然林保护工程管理中心,郑州450003 [2]河南省野生动物救护中心,郑州450044 [3]河南农业大学林学院,郑州450002

出　　处：《河南林业科技》2022年第2期1-5,18,共6页Journal of Henan Forestry Science and Technology

基　　金：国家退耕还林生态效益监测基金(2008-2021)。

摘　　要：在河南省国有焦作林场1 hm^(2)麻栎林观测样地上,观察加倍凋落物、去除凋落物、去除地表物并挖壕沟以及对照等4种处理方式,对暖温带麻栎人工林表层土壤有机碳含量受凋落物输入改变的影响,为生态系统响应全球气候变化等研究提供基础。连续2 a测定0~10 cm、10~20 cm层次土壤有机碳含量结果表明,0~10 cm土层的土壤有机碳含量显著高于10~20 cm土层的;加倍凋落物处理提高了土壤有机碳含量,去除凋落物与去除地表物并挖壕沟处理初期降低而在后期增加了土壤有机碳含量,不同处理间的差异性显著,其影响在0~10 cm土层较大,在10~20 cm土层较小;季节变化对土壤有机碳含量亦有较大影响。The DIRT(detritus input removal and transfer,DIRT)experiment was established near a 1 ha forest ecosystem long term observation stand in Quercus acutissima forest in Jiaozuo State Forest Farm,Henan Province.Four treatments were set up including DL(Double litter,i.e.twice aboveground litter inputs),NL(No litter,i.e.aboveground litter excluded from plots),NI(No input,i.e.aboveground litter and around roots excluded from plot)and CK(Control,normal litter inputs).The soil organic carbon of 0~10 cm and 10~20 cm soil layers were measured for continuous 2 years,to clarify the impact of litter input change on the organic carbon content in ground soil in Quercus acutissima forest in warm temperate zone,and to provide basis for further study on ecosystem response to global climate change.The results showed that the soil organic carbon content of 0~10 cm layer was significantly higher than that of 10~20 cm layer.The soil organic carbon content and its change rate,change velocity,month to month growth rate and year to year growth rate showed fluctuation,the fluctuation range of change velocity showed decreasing tendency,but others enlarge the range at the end of experiment.DL treatment increased the soil organic carbon content,while NL and NI treatments reduced at first but increased at the end,and the difference between these treatments was significant.The research indicated that different treatment of litter input could affect the soil organic carbon content of forest in the warm temperate zone,and mainly affect the 0~10 cm soil layer,weaker affect that of 10-20 cm soil layer;the seasonal change affects the soil organic carbon either.

关 键 词：凋落物输入 暖温带 麻栎人工林 土壤有机碳 DIRT试验 国有焦作林场 

分 类 号：S718.516[农业科学—林学]