Effect of phosphate-solubilizing bacteria and vesicular-arbuscular mycorrhizae on tomato growth and soil microbial activity

被引：225
作者：
Kim Y. [1 ]
Jordan D. [1 ,3 ]
McDonald G.A. [2 ]
机构：
[1] Dept. of Soil and Atmosph. Sciences, School of Natural Resources, University of Missouri, Columbia
[2] Dept. Molec. Microbiol. and Immunol., School of Medicine, University of Missouri, Columbia
[3] 144 Mumford Hall, University of Missouri, Columbia
来源：
Biology and Fertility of Soils | 1997年 / 26卷 / 2期
关键词：
Enterobacter agglomerans; Glomus etunicatum; Organic acids; Phosphate-solubilizing bacteria; Vesicular-arbuscular mycorrhizae;
D O I：
10.1007/s003740050347
中图分类号：
学科分类号：
摘要：
The interaction of vesicular-arbuscular mycorrhizae (VAM) and phosphate-solubilizing bacteria (PSB) on plant growth, soil microbial activities, and the production of organic acids was studied in non-sterile soil containing hydroxyapatite and glucose. Glomus etunicatum (VAM), a fungus, and Enterobacter agglomerans, a bacterium able to solubilize insoluble phosphate, were used as inocula. Three treatments and a control were used: inoculation with E. agglomerans (treatment E), inoculation with G. etunicatum (treatment G), inoculation with E. agglomerans+G. etunicatum (treatment E+G) and the control (C). Inoculation with E, G, or E+G had increased plant growth by days 35, 55, and 75 compared with the control. Microbial biomass carbon (C) and alkaline phosphatase activity in the rhizosphere generally increased with time. Alkaline phosphatase activity was higher in treatments G and E+G compared with the control at 35 and 55 days. The highest acid phosphatase activity was observed in treatment E at 35 days; however, this markedly decreased with time. A significantly higher soluble phosphorus (P) concentration was observed in treatments E and E+G on day 55 compared with C. However, there was no significant difference in soluble P concentration in the rhizosphere between treatments with time. The P concentration was greatest in all treatments on day 55. The highest oxalic acid concentration was observed in the rhizosphere of the non-sterile soil in E+G on day 35. Total N and P uptake in plants from treatments E and G were higher compared with the control. However, the highest N and P uptake was observed in treatment E+G. This study suggests a synergistic interaction between E. agglomerans and G. etunicatum.
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页码：79 / 87
页数：8
相关论文
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