| 摘要: |
| 为了探讨根际促生菌与稀土元素联用对作物生长和土壤改良的影响,采用盆栽实验研究了一株兼具植物促生和生物防治作用的桔黄假单胞菌JD37与常见的农用稀土元素LaCl3联合处理对菠菜生长和土壤生物活性的效果.结果表明:联合处理显著促进了菠菜的生长,增强菌体在菠菜根际土壤和菠菜根内的定殖能力.同时土壤脲酶、纤维素酶、蔗糖酶与过氧化氢酶活性都有提高.联合处理显著提高菠菜总叶绿素含量,比单独接种JD37或浇灌LaCl3分别提高了7.06%和3.80%.土壤细菌和放线菌数量与单独接种JD37或浇灌LaCl3相比也有显著上升.上述结论表明稀土元素在复合微生物肥料的生产与研制中具有较大应用潜力. |
| 关键词: 桔黄假单胞菌 LaCl3 促生 定殖 土壤生物活性 |
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| 基金项目:上海市教委基础研究重点项目(11440502300);上海市教育委员会科研创新项目(11YZ87) |
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| The effect of combination of Pseudomonas aurantiaca JD37 and LaCl3 on the spinach growth and soil biological activities |
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ZHAO Lei, LI Songshuo, JIN Qing, BIAN Xuekun, BAO Xingxing, XIAO Ming
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Development Center of Plant Germplasm Resources,College of Life and Environmental Sciences,Shanghai Normal University
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| Abstract: |
| In order to explore combined effects of the rhizosphere bacteria and rare earth elements on crop growth and soil improvement,in this study,Pseudomonas aurantiaca JD37 which is a plant-growth promoting rhizobacteria and can promote the growth of plants and control the biological diseases,was combining used with LaCl3 which is widely used rare earth on the spinach grouth and biological activity experiments in this study growth and soil biological activities.Results showed that combined treatment promoted the growth of spinach significantly.And the densities of JD37 strain in rhizosphere and root of combined treatment of JD37 and LaCl3 were significantly higher than those shown only by JD37.Moreover,the combined treatments could increase the soil enzyme activities,and especially the soil cellulose activity was increased the most.Compared with vaccination JD37 alone or watering LaCl3 solution,the combined treatment could also increase the total chlorophyll content of spinach and soil microbial quantities.The total chlorophyll content of spinach increased by 7.06% and 3.80% respectively,and the quantity of bacteria and actinomycetes ascended greatly.The conclusion showed the rare earth elements has good application potential in compound microbial fertilizer production and development. |
| Key words: Pseudomonas aurantiaca LaCl3 growth promoting colonization soil biological activity |
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