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草业学报 ›› 2014, Vol. 23 ›› Issue (6): 274-278.DOI: 10.11686/cyxb20140633

• 论文 • 上一篇    下一篇

甜高粱根际溶磷菌溶磷能力及菌株特性研究

雷学军1,2,吴毅1,黄馨1,蔡建波1,2,李卓2,吴林世1   

  1. 1.中南林业科技大学碳循环研究中心,湖南 长沙 410004;
    2.湖南绿心农林科技有限公司,湖南 长沙 410117
  • 收稿日期:2014-04-17 出版日期:2014-12-20 发布日期:2014-12-20
  • 作者简介:雷学军(1958-),男,湖南安乡人,教授
  • 基金资助:
    湖南省科技厅重点项目(S2014S2032)和长沙市科技局重点项目(k1301061-21)资助

Phosphate dissolving capability and the affect of phosphate-dissolving bacteria in the rhizosphere on Sorghum bicolor

LEI Xue-jun1,2,WU Yi1,HUANG Xin1,CAI Jian-bo1,2,LI Zhuo2,WU Lin-shi1   

  1. 1.Research Center of Carbon Cycle, Central South University of Forestry & Technology, Changsha 410004, China;
    2.Hunan Lvxin Agriculture and Forestry Science &Technology Co. Ltd., Changsha 410117, China
  • Received:2014-04-17 Online:2014-12-20 Published:2014-12-20

摘要: 利用蒙金娜培养基,从甜高粱根际分离具有溶磷能力的菌株,通过溶磷圈法筛选出5株溶磷能力较强的菌株,利用钼锑抗比色法和Salkowski比色法分别对溶磷特性与分泌IAA能力进行测定,结果表明,筛选的菌株分解磷酸钙的能力存在显著差异,溶磷量在107.26~233.95 μg/mL之间,各菌株均具有分泌IAA能力,IAA分泌量在15.23~27.79 μg/mL之间,接种溶磷菌后甜高粱株高、茎粗、干重都比对照明显提升。因此, 溶磷能力和分泌IAA能力较强的菌株(WD51、WD20) 可作为研制微生物肥料的优良菌株。

Abstract: Phosphorus is the second of the most necessary elements for plant growth.The phosphorus nutrients needed by plants are mainly sourced from rhizospheric soil, and phosphorus deficiency in the soil is an important limiting factor for agricultural production in many developing countries. Some micro-organisms can convert insoluble phosphate to soluble forms and research on such organisms therefore has considerable practical significance. Five bacterial strains were screened from Mengjinna inorganic mediums. The phosphate-solubilizing characteristics and IAA secretion ability of these strains of bacteria were studied using both the Molybdenum antimony resistance colorimetric method and Salkowski colorimetric method. There were notable differences in the micro-organisms’ phosphate dissolving capability. Phosphate-dissolving capability was 107.26-233.95 μg/mL. All the strains had the ability to produce IAA and IAA capability was 15.23-27.79 μg/mL. In comparison with the control, every strain showed significant benefits to Sorghum bicolor height, stem diameter and dry weight. In summary, strains WD51 and WD20 showed strong capability for phosphate dissolving and IAA secretion and could be used as potential strains for biofertilizer manufacture.

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