克里雅河流域于田绿洲荒漠植被不同生境下生态化学计量特征研究

Research on different habitats of desert vegetation ecological stoichiometric characteristics in Yutian Oasis of the keriya valley

生态化学计量学通过分析比较生态系统能量和多种化学元素(主要指C、N、P)的平衡关系。碳(C)、氮(N)、磷(P)作为植物各项活动所需基本化学元素,其平衡与稳定关系到植物生长和各种生理机能的调节。克里雅河流域于田绿洲地处新疆南部干旱荒漠区域,该区域绿洲生态环境脆弱,生态结构稳定性差,土壤贫瘠,植被稀疏。植物营养元素的吸收、积累、分配及归还对植被生长状况起到至关重要的作用。通过对几种不同的荒漠(芦苇、骆驼刺、柽柳)植被各器官(根、茎、叶)不同生境的C、N、P生态化学计量特征进行分析,旨在为进一步了解克里雅河流域于田绿洲生态系统植被的养分转移、积累、循环机制和养分负荷状况提供理论依据。主要得到以下结论:对芦苇、骆驼刺、柽柳三种荒漠植被C、N、P元素含量以及C:N,C:P,N:P进行数理统计分析与比较。结果表明研究区不同生境的养分和水分条件虽然都不相同,三种植被的N:P都小于14,说明在三种不同生境下三种荒漠植被的生长都受到氮元素的限制。

Ecological stoichiometry ecosystems through analysis and comparison of energy and a variety of chemical elements(mainly C, N, P) of the balance. Carbon(C), nitrogen(N), phosphorus(P) as a plant basic chemical elements required for the activities of its balance and stability related to plant growth and regulation of various physiological functions. Keriya River Basin is located in an arid desert region of southern Xinjiang Yutian Oasis, Oasis fragile ecological environment of the region, ecosystem structure, poor stability, poor soils, vegetation is sparse. Plants absorb nutrients, and accumulation, distribution and return of vegetation growth conditions play a crucial role. Through several different desert(Reeds, Camel Thorn, Tamarix) vegetation in various organs(roots, stems, leaves) different habitats of C, N, P ecological stoichiometry characteristics were analyzed, designed to Learn more about nutrient transfer Keriya River ecosystem Yutian oasis of vegetation, accumulation, and nutrient cycling mechanism to provide a theoretical basis for load conditions. Mainly the following conclusions.1.Comparing P mathematical statistics analysis on Phragmites australis, Alhagi sparsifolia, Tamarix chinensis three desert vegetation C, N, P element content and C: N, C: P, N.The results showed that different habitats of the study area nutrients and moisture conditions, although not the same,N three vegetation: P is less than 14, indicating that at three different habitats in three desert vegetation growth are limited by nitrogen elements.