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首页> 外文期刊>Plant and Soil >INTERACTION BETWEEN BARLEY AND MIXED CULTURES OF NITROGEN FIXING AND PHOSPHATE-SOLUBILIZING BACTERIA
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INTERACTION BETWEEN BARLEY AND MIXED CULTURES OF NITROGEN FIXING AND PHOSPHATE-SOLUBILIZING BACTERIA

机译：大麦与固氮菌和磷酸盐溶解菌的混合培养之间的相互作用

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Pot experiments were carried out to investigate the effect of inoculation with pure and mixed cultures of nitrogen fixers Azospirillum lipoferum 137, Arthrobacter mysorens 7 and the phosphate-solubilizing strain Agrobacterium radiobacter 10 on growth and mineral nutrition of two barley cultivars. A significant positive effect on grain yield both of the studied barley cultivars was obtained after inoculation with mixtures of A. lipoferum 137 + A. radiobacter 10 and A. lipoferum 137 + A. mysorens 7 only. The acetylene reduction activity on roots or in batch culture was significantly higher when A. lipoferum 137 and A. radiobacter 10 were combined. Using N-15 isotope dilution technique it was established that these mixed cultures significantly increased the accumulation of nitrogen fertilizer in the plants. The strain A. radiobacter 10 promoted a better accumulation of phosphorus fertilizer by plants and A. mysorens 7 increased the total phosphorus content in plant tissues. The maximum positive effect of joint inoculation on plant development was observed when the combined nitrogen in soil was in short supply. It was concluded that inoculation with bacterial mixtures provided a more balanced nutrition for the plants and the improvement in root uptake of nitrogen and phosphorus was the major mechanism of interaction between plants and bacteria. The introduced bacteria were able to colonize actively the rhizoplane of barley. No interspecific competition or antagonism were established between components of the bacterial mixtures in the rhizoplane. The strains A. mysorens 7 and A. radiobacter 10 improved viability of A. lipoferum 137 when the plants were grown in acid soil. Field experiments carried out on 3 barley cultivars confirmed the assertion that inoculation with mixed cultures significantly increases the grain yield and nitrogenous nutrition of plants as compared with single cultures.
机译：进行盆栽实验以研究接种固氮混合菌，脂氮固氮螺旋藻137，Mysorens mysorens 7和增溶磷酸盐的土壤杆菌Agrobacterium radiobacter 10的纯和混合培养对两个大麦品种生长和矿物质营养的影响。仅用脂铁曲霉137 +放射杆菌10和脂铁曲霉137 + Mysorens 7的混合物接种后，对两个研究的大麦品种均获得了对谷物产量的显着积极影响。当脂铁曲霉137和放射线杆菌10组合时，根或分批培养中乙炔的还原活性明显更高。使用N-15同位素稀释技术，可以确定这些混合培养物显着增加了植物中氮肥的积累。菌株A. radiobacter 10促进植物更好地积累磷肥，而Mysorens 7则增加植物组织中的总磷含量。当土壤中的氮不足时，联合接种对植物的生长具有最大的积极作用。结论是，细菌混合物的接种为植物提供了更加均衡的营养，而氮和磷的根系吸收的改善是植物与细菌相互作用的主要机理。引入的细菌能够活跃地定居在大麦的根际。在根际平面中细菌混合物的组分之间没有建立种间竞争或拮抗作用。当植物在酸性土壤中生长时，菌株As.mysorens 7和A.radiobacter 10提高了A. lipoferum 137的活力。在3个大麦品种上进行的田间实验证实了这样的说法，即与单一培养相比，混合培养接种可显着提高植物的籽粒产量和含氮营养。

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