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铁还原菌对红壤菜地土壤磷形态转化的影响
引用本文:令狐荣云,王荣萍,梁嘉伟,廖新荣,詹振寿,吴永贵.铁还原菌对红壤菜地土壤磷形态转化的影响[J].农业环境科学学报,2016,35(9):1742-1749.
作者姓名:令狐荣云  王荣萍  梁嘉伟  廖新荣  詹振寿  吴永贵
作者单位:1. 贵州大学资源与环境工程学院,贵阳 550025; 广东省生态环境技术研究所,广东省农业环境综合治理重点实验室,广州510650;2. 广东省生态环境技术研究所,广东省农业环境综合治理重点实验室,广州510650;3. 贵州大学资源与环境工程学院,贵阳,550025
基金项目:国家科技支撑项目“城郊区环保型高效农业关键技术研究与示范”(2014BAD14B05);省院合作“华南不同类型土壤累积态磷素生物活化关键技术研究”(2013B091500016);广州市科技计划项目“有机碳输入促进红壤菜地铁耦合固定态磷的活化机制”(201607010082);广东省科技计划项目“农业面源污染综合生态防控创新能力建设”(2015B070701017)项目
摘    要:采用室内模拟试验,通过外源输入铁还原菌,研究铁还原菌对红壤菜地磷素形态转化的影响。试验结果表明:活性磷(resin-P、Na HCO3-Pi和Na HCO3-Po)占总磷的10%~19%,中稳定态磷(Na OH-Pi和Na OH-Po)约占总磷的35%,稳定态磷(D.HCl-Pi、C.HCl-Pi、C.HCl-Po和residual-P)占总磷的46%~55%;输入铁还原菌活化了磷素,使活性较高的resin-P、Na HCO3-Pi和Na OH-Pi含量上升,活性较低的D.HCl-Pi、C.HCl-Pi以及Na OH-Po含量降低,但对Na HCO3-Po和residual-P的影响不大;与此同时,添加铁还原菌提高了土壤pH值与有效磷(Bray-P)含量。相关性分析结果表明:pH与有机质、有效磷、resin-P、Na HCO3-Pi之间均呈现负相关关系;有机质与有效磷、resin-P和Na HCO3-Pi之间、有效磷与土壤活性磷之间均达到显著正相关水平。总的来说,铁还原菌的输入可以改变红壤菜地土壤中磷的形态,提高土壤活性磷的含量,对土壤磷素起到活化作用。

关 键 词:铁还原菌  磷形态  转化  红壤菜地
收稿时间:2016/4/13 0:00:00

Effects of Iron-reducing bacteria on the transformation of phosphorus in vegetable red soils
LINGHU Rong-yun,WANG Rong-ping,LIANG Jia-wei,LIAO Xin-rong,ZHAN Zhen-shou and WU Yong-gui.Effects of Iron-reducing bacteria on the transformation of phosphorus in vegetable red soils[J].Journal of Agro-Environment Science( J. Agro-Environ. Sci.),2016,35(9):1742-1749.
Authors:LINGHU Rong-yun  WANG Rong-ping  LIANG Jia-wei  LIAO Xin-rong  ZHAN Zhen-shou and WU Yong-gui
Institution:College of Resources and Environmental Engineering, Guizhou University, Guiyang 550025, China;Guangdong Institute of Eco-Environmental Technology, Guangdong Key Laboratory of Agro-Environment Integrated Control, Guangzhou 510650, China,Guangdong Institute of Eco-Environmental Technology, Guangdong Key Laboratory of Agro-Environment Integrated Control, Guangzhou 510650, China,Guangdong Institute of Eco-Environmental Technology, Guangdong Key Laboratory of Agro-Environment Integrated Control, Guangzhou 510650, China,Guangdong Institute of Eco-Environmental Technology, Guangdong Key Laboratory of Agro-Environment Integrated Control, Guangzhou 510650, China,Guangdong Institute of Eco-Environmental Technology, Guangdong Key Laboratory of Agro-Environment Integrated Control, Guangzhou 510650, China and College of Resources and Environmental Engineering, Guizhou University, Guiyang 550025, China
Abstract:Indoor simulation experiments were carried out to investigate the effects of exogenous iron-reducing bacteria(IRB) on the transformation of phosphorus(P) in vegetable red soils. The results shows that:labile P(including resin-P, NaHCO3-Pi and NaHCO3-Po) accounted for 10%~19% of total P, moderately stable P(including NaOH-Pi and NaOH-Po) was 35% and stable P(including D.HCl-Pi, C.HCl-Pi, C.HCl-Po and residual-P) 46%~55%. The introduction of IRB increased the contents of resin-Pi, NaHCO3-Pi and NaOH-Pi which are of high P activity but declined the contents of D.HCl-Pi, C.HCl-Pi and NaOH-Po which are of low P activity. In addition, the introduction of IRB increased soil pH and available P(Bray-P) content. Correlation analyses shows that:there is a negative correlation between pH and organic matter content, available P, resin-P and NaHCO3-Pi; the organic matter content has a significant positive relationship with available P, resin-P and NaHCO3-P; and there is also a significant positive correlation between available P and labile P. In summary, the introduction of iron-reducing bacteria changed the P species in the vegetable red soils, activated soil P and thus increased the content of soil active P.
Keywords:Iron-reducing bacteria  phosphorus species  transformation  vegetable red soil field
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