Concentrations of organic acids (mM) produced by different bacterial strains grown in NBRIP liquid media with rock phosphate (RP) and NH₄⁺ as the sole source of P and N.

Data are given as means ± standard error (n = 3). The same lowercase letters in each row indicate a lack of significance (p<0.05) among the different bacterial strains within each organic acids after 21 days of culture.数据以平均值±标准误（n=3）的形式给出。培养21天后，在每种有机酸条件下，同一行中的相同小写字母代表不同细菌菌株之间无显著性差异（p<0.05）。