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Interactions of trace metals with bacteria and fungi in selected agricultural soils of Egbema Kingdom Warri North Delta state Nigeria

机译：痕量金属与尼日利亚瓦里北三角洲尼日利亚王国王国农业土壤的细菌和真菌的相互作用

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This study was aimed at investigating the relationship of trace metals with prevalence of bacteria and fungi in polluted farmland of Egbema Kingdom, Delta state. This may contribute to the knowledge on the influence of the microorganism to the arability of agricultural soil from an ecotoxicological viewpoint. Soil samples were analyzed for physico-chemical parameters and trace metals using atomic absorption spectrophotometer (Buck Scientific, 210VGP). The samples were also screened for fungi and bacteria isolates. Trace metals (Fe, Zn, Cd, Ni and Cu) determined in the agricultural soils of Egbema kingdom were below WHO limits. The fungi species with the highest number of occurrence was Aspergillus niger, while the species with the lowest occurrence were Fusarium oxsporium, Penicillium dirty white, and Penicillium sp. The order of abundance of fungi across the stations was Station 2> Station 4> Station 3> Station 1> Station 7> Station 5> Station 6> Station 9> Station 8. The bacteria species with the highest number of occurrence was Proteus sp I, while the species with the lowest occurrence was Alcaligenes sp. which occurred only once at Station 5. The order of abundance of bacteria in the soil samples across the stations was Station 4> Station 3> Stations 5 and 9> Station 2> Station 8> Station 7> Station 6. All trace metals in the agricultural soils of Egbema kingdom were below WHO limits. Fe, Zn, Cd and Ni showed no relationship with the microbial contents of the soil. Various strains of fungi and bacteria (gram positive and gram negative) were observed in the soil samples. An antagonistic relationship was observed between bacteria and fungi. Significant positive correlation occurred between the concentration of copper and bacteria counts indicating that the concentration of copper in the soil might have enhanced the abundance of bacteria in the soil, vice versa. The bacteria might be a promising tool in regulation of soil copper concentration.
机译：这项研究的目的是探讨微量金属元素与Egbema王国，三角洲州的农田污染的细菌和真菌的发病率之间的关系。这可能有助于对微生物农业土壤arability从生态毒理学观的影响的认识。土壤样品分析用原子吸收分光光度计（巴克科学，210VGP）的物理 - 化学参数和痕量金属。该样品还筛选了真菌和细菌菌株。在Egbema王国的农业土壤确定的跟踪金属（铁，锌，镉，镍和铜）均低于世界卫生组织限制。与出现次数最多的菌种为黑曲霉，而最低的发生种类为镰刀oxsporium，青霉污白色和青霉菌。丰度跨站是站2>站4>站3>站1>站7>站5>站6>站9>站8.最高出现数目的细菌种真菌的顺序为变形杆菌属我，而最低的发生种类是产碱杆菌。这在站5丰度的细菌的整个站是站4>站3>电台5,9>站2>站8>站7>站中6.所有痕量金属的土壤样品中的顺序发生只有一次Egbema王国的农业土壤均低于WHO的限制。铁，锌，镉和镍表现出与土壤的微生物内容没有任何关系。土壤样品中观察到真菌和细菌（革兰氏阳性和革兰氏阴性）的各种菌株。细菌和真菌之间观察到的拮抗关系。的说明铜在土壤中的浓度可能会增加细菌在土壤中，反之亦然丰富的铜和细菌总数浓度之间显著的正相关性发生。细菌可能在土壤中铜浓度的调节一个行之有效的手段。

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