河南农业科学 ›› 2022, Vol. 51 ›› Issue (11): 73-81.DOI: 10.15933/j.cnki.1004-3268.2022.11.009

• 农业资源与环境 • 上一篇    下一篇

一株高效溶磷菌的条件优化及其促生特性研究

李思思,符运会,罗宇,周佳,赵帅,屈建航   

  1. (河南工业大学生物工程学院,河南 郑州 450001)
  • 收稿日期:2022-09-07 出版日期:2022-11-15 发布日期:2023-01-09
  • 通讯作者: 屈建航(1976-),女,河南南阳人,教授,主要从事环境微生物技术研究。E-mail:qjh_bata@163.com
  • 作者简介:李思思(1998-),女,河南鹤壁人,在读硕士研究生,研究方向:环境微生物学。E-mail:1171800806@qq.com
  • 基金资助:
    河南省高等学校重点科研项目(20A180009);国家自然科学青年基金项目(42107139);河南工业大学创新基金支持计划专项(2021ZKCJ15)

Optimization of the Conditions of an Efficient Phosphate‑Solubilizing Bacterium and Study of Its Growth‑Promoting Effect

LI Sisi,FU Yunhui,LUO Yu,ZHOU Jia,ZHAO Shuai,QU Jianhang   

  1. (College of Bioengineering,Henan University of Technology,Zhengzhou 450001,China)
  • Received:2022-09-07 Published:2022-11-15 Online:2023-01-09

摘要: 自湖泊沉积物中分离到1株高效溶磷细菌菌株1416X3,为提高土壤速效磷利用率及给合理开发微生物菌肥提供依据,通过菌落形态、生理生化特性及16S rRNA基因系统发育分析确定菌株分类地位,并对其溶磷条件进行优化,利用土壤溶磷试验及盆栽试验研究其在土壤中的溶磷过程及对植物的促生能力。结果表明,菌株1416X3为假单胞菌(Pseudomonas sp.);溶磷最佳碳源为葡萄糖,最佳氮源为硫酸铵,最佳初始pH值为7.0,最佳接种量为1%,最佳发酵温度为28 ℃,溶磷量最高可达827.12 mg/L;菌株1416X3在菜地以及花圃土壤中均能有效定殖,且能明显增加土壤速效磷含量;盆栽接种菌株1416X3后,玉米株高、根长、茎粗、鲜质量、干质量、全磷分别较未接种的对照组提高了16.90%、114.02%、43.03%、80.28%、80.85%、88.99%,速效磷含量较对照提高了111.80%。综上,溶磷菌株1416X3可以有效提高土壤速效磷含量,促进玉米幼苗生长,具有较高的应用潜力。

关键词: 溶磷菌, 鉴定, 定殖, 速效磷, 促生作用

Abstract: An efficient phosphate‑solubilizing bacterial strain 1416X3 was isolated from lake sediments,To provide a basis for improving the utilization of available phosphorus in soil and the rational development of microbial fertilizers,the classification status of the strain was identified by colony morphology,physiological and biochemical characteristics and 16S rRNA gene phylogenetic analysis,and its phosphorus solubilizing conditions were optimized.The phosphate‑solubilizing process in soil and its ability to promote plant growth were studied by soil phosphate‑solubilizing test and pot experiment.The results showed that strain 1416X3 was Pseudomonas sp..The optimal carbon source for phosphorus dissolution was glucose,the optimal nitrogen source was ammonium sulfate,the optimal initial pH value was 7.0,the optimal inoculation amount was 1%,the optimal fermentation temperature was 28℃,and the maximum phosphorus dissolution amount could reach 827.12 mg/L. Strain 1416X3 could colonize effectively in vegetable and garden soils,and significantly increase the content of available phosphorus in soil.Compared to the control group that was not inoculated with 1416X3,the plant height,root length,stem diameter,fresh weight,dry weight and total phosphorus of maize inoculated with strain 1416X3 in pot were increased by 16.90%,114.02%,43.03%,80.28%,80.85% and 88.99%,respectively,and the content of available phosphorus was 111.80% higher than that of the control.In summary,phosphate‑solubilizing strain 1416X3 can effectively improve soil available phosphorus content,promote the growth of maize seedlings,and has high application potential.

Key words: Phosphorus?solubilizing bacteria, Identification, Colonization, Available phosphorus, Growth?promoting effect

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