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中文摘要：
本试验以河南县高寒草甸草地类型为研究对象,比较分析了补播改良后1-3年的群落多样性与生物量的变化情况。结果表明：补播可显著增加河南县高寒草甸草地植物的生物量和群落物种丰富度。同时表明补播第1年后,草地植物群落结构处于不稳定状态,但随着补播时间的推移,在补播第3年时,群落Simpson指数和Berger-Parker优势度指数最高,群落多样性越来越好,植物群落结构趋于稳定。本试验结论可为高寒草甸的草地改良提供理论依据。
英文摘要：
The change of species diversity and biomass of alpine meadow in Henan county was studied by the reseed improvement after from1 to 3 years. The results showed that reseed can significantly increase plant biomass and community species richness of alpine meadow grassland in Henan county. The grassland plant community structure is in an unstable state after one year reseed. But community Simpson in-dex and Berger - Parker index reaches the highest after three years reseed,community diversity become more and more well,plant commu-nity structure tend to stable. The test results can provide theoretical basis for the alpine meadow grassland improvement.
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