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从潮土、水稻土、砂姜黑土和石灰土等土壤的植物根际土壤和根中分离了86株磷细菌,通过液体摇瓶培养3d,培养液水溶磷含量为4.2～387.3mg/L,水溶磷含量与培养液pH呈显著负相关(R2=0.621 6)。用筛选出的1株磷细菌(HCW115)进行玉米盆栽试验,结果表明,磷细菌处理的玉米干物重和吸磷量与对照相比分别增加了37.5%和40.2%,达到显著差异。磷细菌对土壤Al-P、Fe-P和O-P转化无明显影响,但可以促进土壤Ca2-P、Ca8-P和Ca10-P向有效磷转化而被玉米吸收,与原土相比,Ca2-P、Ca8-P和Ca10-P含量分别减少了74.9%,12.3%和1.51%。
Eighty-six strains of phosphorus-producing bacteria were isolated from soil rhizosphere soils and roots in soils of soils, paddy soils, sago lime black soil and lime soil. The water-soluble phosphorus content in the culture broth was 4.2-387.3 mg / L by liquid shake flask culture for three days. The content of water soluble phosphorus was negatively correlated with the pH of the culture solution (R2 = 0.621 6). The results showed that the dry matter weight and phosphorus uptake of maize treated with phosphorus bacteria increased by 37.5% and 40.2% respectively compared with the control, reaching significant differences. Phosphorus bacteria had no significant effect on Al-P, Fe-P and OP conversion, but Ca2-P, Ca8-P and Ca10-P promoted the conversion of available P to maize. Compared with native soil, P, Ca8-P and Ca10-P decreased by 74.9%, 12.3% and 1.51% respectively.