【摘要】 为了获得高效解有机磷细菌,从油茶植株根际土壤中分离到21株解有机磷细菌,采用透明圈法进行复筛,仅有4株细菌能在有机磷培养基上形成明显的透明圈。4株细菌的D/d值在1.62～2.71之间,其中菌株Y6的D/d值最大,为2.71。发酵上清液有效磷含量为8.50～14.79 mg/L,较CK增加7.88～14.17 mg/L,其中菌株Y6发酵上清液有效磷含量最多,为14.79 mg/L,较CK增加14.17 mg/L。根据菌株Y6的菌落形态特征和生理生化特征及16S rDNA序列分析结果,初步确定菌株Y6为假单胞菌属。该菌株有利于改善油茶磷素供应,促进油茶生长,在生物有机肥研制中具有较大潜力。更多还原

【Abstract】 In order to obtain high-efficiency organophosphorus solubilizing bacteria, 21 strains of organophosphate solubilizing bacteria were isolated from the rhizosphere soil of Camellia oleifera plants, and the transparent circle method was used for rescreening. Only 4 strains of bacteria could form transparent circle on organophosphorus medium. The D/d value of 4 strains of bacteria was between 1.62 and 2.71, among which the D/d value of strain Y6 was the highest(2.71). The available phosphorus content of the fermentation supernatant was 8.50～14.79 mg/L, which was 7.88～14.17 mg/L higher than that of CK. The strain Y6 had the highest soluble phosphorus content of 14.79 mg/L in the fermentation supernatant, which was 14.17 mg/L higher than that of CK. According to the colony morphology, physiological and biochemical characteristics and 16S rDNA sequence analysis of strain Y6, it is preliminarily determined that strain Y6 is Pseudomonas. Strain Y6 is beneficial to improve the supply of phosphorus in rhizosphere soil of Camellia oleifera and promote the growth of Camellia oleifera. It has great potential in the development of bio-organic fertilizer.更多还原