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. |
铁还原菌对红壤菜地土壤磷形态转化的影响 |
Effects of Iron-reducing bacteria on the transformation of phosphorus in vegetable red soils |
投稿时间:2016-04-13 |
DOI:10.11654/jaes.2016-0508 |
中文关键词: 铁还原菌 磷形态 转化 红壤菜地 |
英文关键词: Iron-reducing bacteria phosphorus species transformation vegetable red soil field |
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 |
作者 | 单位 | E-mail | 令狐荣云 | 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 | | 王荣萍 | 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 | rpwang@soil.gd.cn | 梁嘉伟 | 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 | | 廖新荣 | 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 | | 詹振寿 | 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 | | 吴永贵 | 贵州大学资源与环境工程学院, 贵阳 550025 | |
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中文摘要: |
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、NaHCO3-Pi和NaHCO3-Po)占总磷的10%~19%,中稳定态磷(NaOH-Pi和NaOH-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、NaHCO3-Pi和NaOH-Pi含量上升,活性较低的D.HCl-Pi、C.HCl-Pi以及NaOH-Po含量降低,但对NaHCO3-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、NaHCO3-Pi之间均呈现负相关关系;有机质与有效磷、resin-P和NaHCO3-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。 |
英文摘要: |
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. |
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