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本书以长期定位试验站的典型旱作农田土壤生态系统为对象,深入研究农业生产中较常采用的秸秆覆盖、不同地膜覆盖模式对旱地农田土壤环境及微生物群落多样性、结构特征等方面的影响,揭示覆膜条件下增温和保水等土壤环境变化对土壤微生物区系特征和动态变化的作用机理,可以更好的利用其促进作物子系统与土壤子系统的耦合,为探明旱区土壤肥力发育的程度和发展趋向提供依据,对保护旱作农业土壤环境健康及维护生态系统的稳定性具有重要意义。对具有特定功能的微生物资源的研究与开发也具有重要影响。