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首页> 外文期刊>Plant and Soil >Diazotrophic communities are more responsive to maize cultivation than phosphorus fertilization in an acidic soil
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Diazotrophic communities are more responsive to maize cultivation than phosphorus fertilization in an acidic soil

机译：真正的营养社区对玉米培养比酸性土壤中的磷施肥更敏感

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Aims Although phosphorus (P) availability and plant cultivation affect diazotrophic populations, studies often consider individual factors rather than their combined effects. Their relative importance to diazotrophs remains poorly understood, especially in acidic soils with P deficiency. It is hypothesized that the influences of P fertilization and plant cultivation on diazotrophic communities differ in acidic soils. The objectives were to investigate these influences and identify the key determining factors. Methods Maize was grown in an acidic soil that was supplemented with 0, 20, and 50 mg P kg(- 1)for 42 days. Maize biomasses, plant nutrient contents, and soil physicochemical properties were determined. Based on thenifHgene, the abundances and community compositions of diazotrophs in the different plant/soil compartments (bulk soils, rhizosphere soils, and roots) were respectively investigated using quantitative PCR and high-throughput sequencing. Results P fertilization significantly improved the diazotrophic abundances in the bulk and rhizosphere soils, but not in the roots. The plant/soil compartments had stronger effects on the abundance and diversity of diazotrophs than did P fertilization. Furthermore, the plant/soil compartments influenced diazotrophic community composition, but P fertilization did not. However, in the same sampling site, P fertilization caused community variations in the bulk and rhizosphere soils, rather than in the roots. Conclusions Although P fertilization affected the abundances and compositions of diazotrophic communities in the bulk and rhizosphere soils, the plant/soil compartments resulting from maize cultivation had more noticeable effects than did P fertilization. These findings improved the understanding of biological nitrogen fixation in acidic soils.
机译：目的虽然磷（P）可用性和植物培养影响了真正的营养群体，但研究通常会考虑个体因素而不是其综合影响。它们对无氮藻的相对重要性仍然明白，特别是在具有P缺乏症的酸性土壤中。假设P施肥和植物栽培对无催化性社区的影响在酸性土壤中不同。目标是调查这些影响并确定关键的确定因素。方法玉米在酸性土壤中生长，其补充有0,20,50mg p kg（ - 1）42天。测定玉米生物质，植物营养物质和土壤理化性质。基于当时，使用定量PCR和高通量测序，分别研究了不同植物/土隔室（散装土壤，根际土壤和根部）在不同植物/土隔室（散装土壤，根际土壤和根）中的丰富和群落组成。结果P施肥显着改善了散装和根际土壤中的虚拟营养丰富，但不是在根中。植物/土壤隔间对重氮化的丰富和多样性效果更强，而不是P施肥。此外，植物/土隔室影响了重氮营养群落组成，但P施肥没有。然而，在相同的抽样网站中，P施肥引起散装和根际土壤的群落变异，而不是根源。结论虽然P施肥影响了散装和根际土壤中真正营养群落的丰富和组成，但玉米栽培引起的植物/土舱具有比P施肥更明显的效果。这些发现改善了对酸性土壤中生物氮固定的理解。

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