短期围封对伊犁绢蒿荒漠群落特征及植被多样性的影响

摘要

[Objective] To reveal the community characteristics and vegetation diversity of Seriphidium transiliense desert response to short -term enclosure, and provide the theoretical basis for the restoration and reconstruction of degraded sagebrush desert.[Method]In this study,in order to discuss the effects of short -term enclosure on the characteristics and diversity of desert communities, the coverage, height, density and biomass of the community were studied by field monitoring method, and the diversity indexes of community vegetation were calculated.[Result](1)The community height,coverage and biomass increased significantly by 89.7%, 153.9% and 130.8%(P 0.05).[Conclusion]Enclosure has become the most effective measure to restore and reconstruct degraded grassland,and the biomass of grassland community can be increased by enclosure, but the species diversity index is low,and the grazing reduces richness index.%[目的]研究伊犁绢蒿荒漠群落数量特征、多样性对短期围封的响应规律,为退化蒿类荒漠恢复与重建提供理论依据.[方法]以伊犁绢蒿荒漠为研究对象,通过对群落盖度、高度、密度、生物量的野外测定,并计算群落Simpson(D)、Shannon-Wiener(H)、Pielou(J)及Margalef(P)指数,研究短期围封对荒漠群落特征及其多样性的影响.[结果]围封后,群落高度、盖度和生物量分别显著增加了89.7%,153.9%,130.8%(P0.05).[结论]围封已成为恢复及重建退化草地的最有效的措施,通过围封可以提高退化荒漠植被生物量,但植被多样性指数偏低,放牧降低丰富度指数.