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| Natural succession process of vegetation on the abanded land in the Hilly-gully Region of Loess Plateau: A case study of Shuangshugou Watershed in Wuqi County |
| Zeng Guang<sup>1,2</sup>,Yang Qinke<sup>1</sup>,Zhang Xinbao<sup>3</sup> |
| 1.Institute of Soil and Water Conservation,CAS & MWR,712100,Yangling,Shaanxi;2.Graduate University of the Chinese Academy of Sciences,100049,Beijing;3.Institute of Mountain Hazards and Environment,CAS,610041,Chengdu: China |
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Abstract The two-way indicator species analysis were adopted to classify the vegetation naturally recuperating on 30 sample sites of abandoned lands distributed in Shuangshugou Watershed of Wuqi County,which is located in the Hilly-gully Region of Loess Plateau.The plant community characteristics of different natural restoration grasslands and above-ground biomass were calculated.The results showed that the vegetations on the abandoned lands successfully experienced <i>Artemisia scoparia</i> community,<i>Leymus scalinus</i> and Stipa bungeana community,<i>Leymus scalinus</i> and <i>Artemisia sacrorum</i> community,<i>Artemisia sacrorum</i> community,<i>Artemisia sacrorum</i> and <i>Artemisia giraldii</i> Pamp community.The typical vegetation <i>Artemisia sacrorum</i> and <i>Artemisia giraldii</i> Pamp community has appeared,and it takes great advantage in this study area.The indexes of Margalef,Shannon-wiener,Pielou and above-ground biomass manifested decrease with removal time passing by at first and then increase.Though the richness indexes and diversity indexes increased in the stable stage of vegetation restoration,there was a little lower than elementary stage.And it also had the trend to reach the initial stage.The richness indexes of the first stage were the largest,and the evenness indexes of the fifth stage were the biggest.The vegetation coverage degree became larger with the prolonging of vegetation restoration.
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Received: 10 September 2007
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