中文摘要：

从陵水普通野生稻中分离了36株内生菌，经乙炔还原法确定22株菌为内生固氮菌，并测定了其溶磷特性，在22株内生固氮菌中，除菌株Ls2不具有溶磷能力外，其余21株菌溶磷能力差异较大，为（0．002±0.01）～（12.7±0．04）μg mL^-1．将这些内生固氮菌接种籼型水稻华航1号，除菌株Ls23外，其余菌株均能使接种水稻苗的根、茎长度增加（在α-0．05水平上差异显著）．以上研究结果表明，这些菌株在水稻菌肥研制方面具有较大的开发潜力．

英文摘要：

Thirty six strains isolated from wild rice Oryza rufipogon originated from Lingshui, Hainan, China were tested by acetylene-reduction assay （ARA）. Among them, 22 isolates belonged to endophytic nitrogen-fixing bacteria. Endophytic diazotrophs were then used to inoculate the cultivated rice Huahang 1 and their phosphate-solubilizing activities were tested. The result showed that the roots and stalks of the inoculated rice were obviously becoming longer, except strain Ls23. The phosphate-solubilizing abilities of the strains were ranged between （0. 002 ± 0.01 ） - （ 12.7 ± 0.04） p,g mL^-1, except strain Ls2. The data obtained from the study indicated that these endophytic nitrogen-fixing bacteria had the potential application for production of rice biofertilizer.