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首页> 美国卫生研究院文献>International Journal of Environmental Research and Public Health >Integrated Effects of Co-Inoculation with Phosphate-Solubilizing Bacteria and N2-Fixing Bacteria on Microbial Population and Soil Amendment Under C Deficiency
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Integrated Effects of Co-Inoculation with Phosphate-Solubilizing Bacteria and N2-Fixing Bacteria on Microbial Population and Soil Amendment Under C Deficiency

机译：磷缺乏下磷肥细菌和固氮细菌共接种对微生物种群和土壤改良的综合影响

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The inoculation of beneficial microorganisms to improve plant growth and soil properties is a promising strategy in the soil amendment. However, the effects of co-inoculation with phosphate-solubilizing bacteria (PSB) and N2-fixing bacteria (NFB) on the soil properties of typical C-deficient soil remain unclear. Based on a controlled experiment and a pot experiment, we examined the effects of PSB (M: Bacillus megaterium and F: Pseudomonas fluorescens), NFB (C: Azotobacter chroococcum and B: Azospirillum brasilence), and combined PSB and NFB treatments on C, N, P availability, and enzyme activities in sterilized soil, as well as the growth of Cyclocarya Paliurus seedlings grow in unsterilized soil. During a 60-day culture, prominent increases in soil inorganic N and available P contents were detected after bacteria additions. Three patterns were observed for different additions according to the dynamic bacterial growth. Synergistic effects between NFB and PSB were obvious, co-inoculations with NFB enhanced the accumulation of available P. However, decreases in soil available P and N were observed on the 60th day, which was induced by the decreases in bacterial quantities under C deficiency. Besides, co-inoculations with PSB and NFB resulted in greater performance in plant growth promotion. Aimed at amending soil with a C supply shortage, combined PSB and NFB treatments are more appropriate for practical fertilization at intervals of 30–45 days. The results demonstrate that co-inoculations could have synergistic interactions during culture and application, which may help with understanding the possible mechanism of soil amendment driven by microorganisms under C deficiency, thereby providing an alternative option for amending such soil.
机译：在土壤改良剂中接种有益微生物以改善植物生长和土壤特性是一种有前途的策略。然而，与磷酸盐增溶菌（PSB）和固氮菌（NFB）共同接种对典型的碳缺乏土壤的土壤特性的影响尚不清楚。在对照实验和盆栽实验的基础上，我们研究了PSB（M：巨大芽孢杆菌和F：荧光假单胞菌），NFB（C：绿脓杆菌和B：细螺旋藻）的影响，以及PSB和NFB联合治疗对C，无菌土壤中氮，磷的有效性和酶活性，以及​​未经消毒的土壤中Cyclocarya Paliurus幼苗的生长。在60天的培养过程中，添加细菌后，土壤无机氮和有效磷含量显着增加。根据动态细菌的生长，观察到三种不同添加方式。 NFB和PSB之间有明显的协同作用，与NFB共同接种可增加有效磷的积累。然而，在第60天观察到土壤有效磷和氮的减少，这是由于缺碳条件下细菌数量的减少引起的。此外，与PSB和NFB共同接种在促进植物生长方面表现更好。为了修正碳供应不足的土壤，PSB和NFB的联合处理更适合间隔30-45天进行实际施肥。结果表明，共接种在培养和施用过程中可能具有协同相互作用，这可能有助于理解由碳缺乏下微生物驱动的土壤改良的可能机理，从而为土壤改良提供了替代选择。

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