土壤2025，Vol.57Issue(4)：760-770,11.DOI:10.13758/j.cnki.tr.2025.04.005
模拟雷竹林覆盖缺氧对土壤氮素转化及微生物群落的影响
Effects of Soil Hypoxia on Nitrogen Transformation and Microbial Communities in Simulated Phyllostachys praecox Forest with Mulching
摘要
Abstract
In this study,an indoor soil culture experiment simulating the oxygen-deficient environment of Phyllostachys praecox forest with mulching was set up to explore the effects of soil hypoxia(oxygen content in 0%,5%,10%,and 20%)on nitrogen transformation,related enzyme activities and soil microbes.The results showed there was a pronounced impact of oxygen content on soil inorganic nitrogen levels.Under 0%and 5%oxygen levels,a significant decrease in soil NO3--N content was observed,accompanied by an increase in NH4+-N accumulation at the end of the incubation period.Meanwhile,urease activity was suppressed but nitrate reductase and nitrite reductase activities were enhanced.Incubation under 0%oxygen led to a notable reduction in soil microbial biomass carbon by 16.79%and microbial biomass nitrogen by 13.25%compared to non-anoxic settings.The diversity of soil microbial community decreased with the decreasing oxygen level,although 5%oxygen content resulted in an enhanced microbial community diversity.Furthermore,although the dominant phylum and genus of soil microbial community remained consistent across varying oxygen contents,there were significant differences in their relative abundances.Overall,this study illustrates that soil hypoxia in Phyllostachys praecox forest can induce alterations in soil nitrogen composition,enzyme activity,and microbial community,which is not benefical for the transformation and utilization of soil nitrogen,ultimately raising the risk of soil nitrogen loss,which is detrimental to the growth and management of Phyllostachys praecox forests.关键词
雷竹林/土壤缺氧/氮转化/酶活性/微生物群落Key words
Phyllostachys praecox/Soil hypoxia/Nitrogen transformation/Enzyme activity/Microbial community分类
农业科技引用本文复制引用
张雨禾,于云飞,李小雪,卢澳邹,兰超琼,庄舜尧..模拟雷竹林覆盖缺氧对土壤氮素转化及微生物群落的影响[J].土壤,2025,57(4):760-770,11.基金项目
国家自然科学基金项目(41671296)资助. （41671296）
