生态环境学报2016，Vol.25Issue(9)：1431-1438,8.DOI:10.16258/j.cnki.1674-5906.2016.09.002
水分管理对稻田细菌丰度与群落结构的影响
Effect of Water Management on Soil Bacterial Abundance and Community in the Rice Paddy Field
摘要
Abstract
A field plot experiment was conducted on studying the influence of water management on soil bacterial abundance and community in a rice paddy field during the late rice season in Changsha, Hunan Province. The study included four treatments, that were intermittent flooding without straw (IFS0), intermittent flooding with straw (IFS), continuous flooding without straw (CFS0) and continuous flooding with straw (CFS). The results showed that: the density of bacteria in IF soil was higher than that in CF soil at DNA level. The abundance of bacteria was 3.9×1010 copies·g-1 dry soil in IFS0, which was 2.18 times of that in CFS0. The abundance of bacteria was 6.1×1010copies·g-1 dry soil in IFS, which was 2.21 times of that in CFS. At RNA level, the bacteria was more abundant in IF soil than in CF soil. The abundance of bacteria in IFS0 was 2.1×108 copies·g-1 dry soil, which was 2.58 times of that in CFS0. The abundance of bacteria in IFS0 was 2.8×108 copies·g-1 dry soil, which was 1.13 times of that in CFS0. The bacterial structure differed between intermittent flooding (IFS0 and IFS) and continuous flooding (CFS0 and CFS) at both DNA and RNA levels. The diversity index in intermittent flooding (IFS0 and IFS) was similar to that in continuous flooding (CFS0 and CFS) at DNA level, however, the predominant species were different. At RNA level, the diversity index in intermittent flooding (IFS0) was higher than that in continuous flooding (CFS0), it was even more obvious when straw was added. The diversity index in IFS was 2.49, which was higher than that in CFS, which was 0.28. In general, water management dramatically affected bacterial abundance and community structure in paddy soils and intermittent flooding was a better strategy than continuous flooding for rice cultivation.关键词
间歇灌溉/长期淹水/稻草还田/细菌丰度/群落结构Key words
intermittent flooding/continuous flooding/rice straw returning/bacterial abundance bacterial community分类
农业科技引用本文复制引用
侯海军,张文钊,沈建林,王聪,秦红灵..水分管理对稻田细菌丰度与群落结构的影响[J].生态环境学报,2016,25(9):1431-1438,8.基金项目
国家自然科学基金面上项目（41271280）；湖南省自然科学基金面上项目 （）
