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冰川冻土  2012 

青藏高原多年冻土区高寒草甸植物种群物候学定量研究

, PP. 1142-1148

Keywords: 高寒草甸,物候指数,物候类型,环境因子

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Abstract:

采用青藏高原腹地北麓河多年冻土区高寒草甸14种代表性植物种群2009年和2010年两个生长季的物候观测资料,进行植物种群物候学特征的定量分析,划分物候类型并指出影响不同物候期的环境因子主次.结果表明营养期和结实期的物候指数都较大,分别为32.70和24.39,其他物候期则相对较小;整个生长期持续天数较短,为155d左右.14种植物可划分为3种类型和6大类群.在营养期和整个生长期,与物候变化最为密切的环境因子为降水量,其次为日照时数,温度居第三;而影响其他物候期的因子均以日照时数为主,降水量和温度依次居后.

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