Phosphorus (P) is a highly immobile soil nutrient, thus enhancing its availability through mechanisms such as unique, phosphate solubilizing microorganisms (PSMs) may help improve soil-plant P relationships. The objective of this study was to evaluate P solubilization and activity of Anabaena sp. and Mammoth P using two different organic P sources (bone meal and rock phosphate) under laboratory conditions. Treatments were arranged in a full factorial design with three replications, three organic P sources [bone meal (BM), rock phosphate (RP) and control (No P added)], three PSM treatments [control (No PSM), Cyanobacteria (Cyano), Mammoth P (MP)] and six sampling dates over 56 days. There were no significant differences observed in pH across treatments over the 56-day incubation (p = 0.05). The Cyano treatment had greater water-soluble P and Olsen-extractable P concentrations under the No P control and RP treatments compared with the No PSM control and MP treatments. In terms of Olsen P concentration, the MP treatment of the BM source was greater than the No PSM control and equal to the Cyano treatment. Results suggest that the Cyano treatment solubilized more P than MP, and thus may be an effective strategy for improving future soil P availability to plants, especially in light of future dwindling rock phosphate reserves.

磷（P）是一种高度固定的土壤养分，因此通过独特的可溶解磷酸盐的微生物（PSM）等机制提高了磷的利用率，可能有助于改善土壤与植物P的关系。这项研究的目的是评估Anabaena sp。的P增溶和活性。和猛mm磷在实验室条件下使用两种不同的有机磷源（骨粉和磷酸盐岩）。治疗以全因子设计进行安排，包括三个重复，三个有机磷源[骨粉（BM），磷酸盐岩（RP）和对照（不添加P）]，三种PSM治疗[对照（No PSM），蓝细菌（蓝藻） ），猛mm象P（MP）]和56天的六个采样日期。在56天的孵育过程中，各处理的pH值均无显着差异（p = 0.05）。与No PSM对照和MP处理相比，Cyano处理在No P对照和RP处理下具有更高的水溶性P和Olsen可提取P浓度。就Olsen P浓度而言，BM源的MP处理大于No PSM对照，等于Cyano处理。结果表明，氰基处理比MP溶解的磷更多，因此可能是提高植物未来土壤磷利用率的有效策略，尤其是考虑到未来磷矿储量的减少。