翻译9株内生细菌溶磷圈直径、溶磷圈与菌落的直径比值Dd分别处于176-208cm、185-231之间其中PG-9菌株溶磷圈直径比值最大为231

Translation: The diameter of the phosphate-solubilizing zone of 9 endophytic bacterial strains and the ratio of the phosphate-solubilizing zone to the colony diameter (D/d) are between 1.76-2.08 cm and 1.85-2.31, respectively. Among them, strain PG-9 has the highest ratio of the phosphate-solubilizing zone diameter, which is 2.31.