基于香农-威纳多样性指教,研究了青海湟水河流域相同林龄(8年)的不同退耕还林模式生物多样性.结果表明,湟水河流域不同退耕还林模式生物多样性为云杉桦树混交＞沙棘＞桦树＞云杉＞云杉沙棘混交＞农田,草本层多样性＞乔木层.%Based on biodiversity index of Shannon-Weiner, the effects of biodiversity index from different models of conversion of farmland to forest in Huangshui river of Qinghai Province were studied, the results showed that mixture of picea crassifolia and birch > hippophae rham-noides > birch > picea crassifolia > mixture of picea crassifolia and hippophae rhamnoides > farmland, biodiversity index of herbaceous layer >arbor layer.
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