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防护林下草本植物层片物种多样性与环境因子的关系

, PP. 118-125

Keywords: 物种多样性,环境因子,防护林,草本植物,沙漠公路,塔里木沙漠公路

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Abstract:

沿塔里木沙漠公路防护林自北向南设置了10个调查样地,对草本植物的多度、盖度、丰富度进行调查,记录和测定各样地内地下水的埋深、电导率、矿化度,土壤电导率、灌木平均冠幅、灌木层郁闭度等环境因子。分析各样地物种多样性、样地间相似性的差异,以及草本植物层片物种多样性与环境因子的关系。结果表明塔里木沙漠公路防护林下草本植物层片物种多样性与地下水(埋深、水质)、表层土壤电导率之间存在密切关系,Shannon-Wiener指数与地下水埋深、地下水电导率、0~10cm土壤电导率的相关系数分别为0.72,0.63和0.69,Simpson多样性指数与地下水埋深、地下水电导率、0~10cm土壤电导率的相关系数分别为0.65,0.61和0.69。

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