黄河兰州段湿地土壤与甘蒙柽柳叶片碳氮磷生态化学计量特征  

Ecological stoichiometric characteristics of carbon,nitrogen and phosphorus in the soil and leaves of Tamarix austromongolica of the wetland in Lanzhou section of the Yellow River

作　　者：刘文兰[1] 孙学刚[1] 焦健[1] 田青[1] 曹文侠[2] 马山虎 Liu Wenlan;Sun Xuegang;Jiao Jian;Tian Qing;Cao Wenxia;Ma Shanhu(College of Forestry,Gansu Agricultural University,Lanzhou 730070,Gansu,China;College of Prataculture,Gansu Agricultural University,Lanzhou 730070,Gansu,China)

机构地区：[1]甘肃农业大学林学院,甘肃兰州730070 [2]甘肃农业大学草业学院,甘肃兰州730070

出　　处：《北京林业大学学报》2023年第6期43-51,共9页Journal of Beijing Forestry University

基　　金：甘肃农业大学科技创新基金-学科建设专项基金(GAU-XKJS-2018-114);甘肃省高等学校创新能力提升项目(2019B-072);甘肃省林业和草原局林草科技创新与合作项目(kjcx2021004);国家自然科学基金项目(31360569)。

摘　　要：【目的】通过分析优势植物甘蒙柽柳在黄河兰州段湿地不同地段条件下土壤与叶片生态化学计量特征,探讨甘蒙柽柳的生态适应性及其生长的限制因子,为湿地植物甘蒙柽柳的管理、生态保育提供理论依据。【方法】在黄河兰州段自西到东选择4个典型样点,即西固兰高集团附近黄河边湿地(I)、银滩湿地公园(Ⅱ)、寓言故事园附近黄河边湿地(Ⅲ)及雁滩滩尖子湿地公园(Ⅳ),研究土壤与甘蒙柽柳叶片生态化学计量特征的变化。【结果】黄河兰州段湿地土壤碳(C)、氮(N)、磷(P)含量平均值分别为10.66、0.16、0.24 g/kg,C、N、P含量自西到东均依次降低,C∶P、C∶N和N∶P则基本相反,其中样点Ⅰ的P含量显著高于其他样点,样点Ⅳ的C∶P显著高于其他样点。甘蒙柽柳叶片C、N、P含量平均值分别为364.60、29.95、1.02 g/kg,不同样点甘蒙柽柳叶片C含量无明显差异,N和P含量自西到东依次降低,C∶N、C∶P和N∶P则相反,其中样点Ⅰ的N、P含量显著高于其他样点。相关分析表明,土壤的C、N、P含量呈显著正相关,甘蒙柽柳叶片的N、P含量呈显著正相关,土壤和甘蒙柽柳叶片之间的N、P含量及C∶P、N∶P分别均呈显著正相关。各样点甘蒙柽柳叶片N∶P>20。【结论】黄河兰州段湿地甘蒙柽柳生长受到P限制。建议在湿地养护管理中加强植物群落结构调整及凋落叶归还等措施以改善其养分限制状况。[Objective]By analyzing the ecological stoichiometric characteristics of soil and leaves of the dominant plant Tamarix austromongolica under different conditions in the wetland of Lanzhou section of the Yellow River,this study explored the ecological adaptability and growth limiting factors of T.austromongolica,providing a theoretical basis for the management and ecological conservation of the wetland plant T.austromongolica.[Method]We selected 4 typical sampling sites in Lanzhou section of the Yellow River from west to east in turn,namely wetland near Langao Group along the Yellow River(Ⅰ),Yintan Wetland Park(Ⅱ),wetland near the Fable Garden along the Yellow River(Ⅲ),and Yantan Tanjianzi Wetland Park(Ⅳ)to study the eco-stoichiometric characteristics of soils and leaves of T.austromongolica.[Result]The average contents of C,N and P were 10.66,0.16 and 0.24 g/kg,respectively in wetland soil in Lanzhou section of the Yellow River.The contents of C,N and P decreased from west to east,while the C∶N,C∶P and N∶P were opposite.P content inⅠwas significantly higher,and C∶P inⅣwas significantly higher than that in other sampling sites.The average contents of C,N and P in T.austromongolica leaves were 364.60,29.95 and 1.02 g/kg,respectively.There was no significant difference in C content of T.austromongolica leaves among the four sampling sites.The contents of N and P decreased from west to east,while the C∶N,C∶P and N∶P were on the contrary.The N and P contents ofⅠwere significantly higher than those of other sampling sites.Correlation analysis showed that the contents of C,N and P in soil were significantly positively correlated,the contents of N and P in T.austromongolica leaves were significantly positively correlated,and the contents of N and P,C∶P and N∶P between soil and T.austromongolica leaves were significantly positively correlated,respectively.The leaf N∶P of T.austromongolica in various sample points was higher than 20.[Conclusion]The growth of T.austromongolica in Lanzhou se

关 键 词：C、N、P 生态化学计量 甘蒙柽柳 土壤 叶片 湿地 

分 类 号：S731.1[农业科学—林学]