模拟冻融对高山土壤微生物数量和活性的影响
发布时间:2019-02-11 11:23
【摘要】:目的:全面了解冬季高山土壤循环过程,为全球气候变化下生物种群和分布的变化提供技术支持.方法:采用室内模拟冻融的方法,研究了不同冻融处理(-2℃,-2~2℃,-20~2℃)对土壤微生物数量和活性的影响.结果:研究发现,持续的冻结(-2℃)降低了土壤细菌数量、微生物总数量和微生物生物量碳氮含量.剧烈的冻融(-20~2℃)降低了蔗糖酶活性,而温和的冻融(-2~2℃)则增加了细菌数量、微生物总数量和纤维素酶、过氧化氢酶活性.结论:适当的冻融可以通过改善土壤微生物数量和群落结构,从而对土壤营养物质的转化和植物群落的构建产生实质性的影响.
[Abstract]:Objective: to understand the alpine soil cycling process in winter and provide technical support for the change of biological population and distribution under global climate change. Methods: the effects of different freezing and thawing treatments (-2 鈩,
本文编号:2419685
[Abstract]:Objective: to understand the alpine soil cycling process in winter and provide technical support for the change of biological population and distribution under global climate change. Methods: the effects of different freezing and thawing treatments (-2 鈩,
本文编号:2419685
本文链接:https://www.wllwen.com/kejilunwen/nykj/2419685.html