目前,几种类型的固氮菌(Azospirillum,Clostridium,Enterobacter,Alcaligenes和 Pseudomonas)已经从水稻根际分离出来,但仅有几篇报道详细描述了这些细菌同水稻植物进行联合共生固氮的能力,而且对一些问题有不同的看法。我们认为有必要做以下几方面的工作:(1)确证固氮作用是由特殊的细菌与水稻联合共生时引起的;(2)特殊细菌的固氮活性必须通过筛选细菌加以改良;(3)改良水稻与细菌联合固氮的遗传能力。曾报道,印度型水稻品种 C5444能诱导出较高的乙炔还原活性。最近,我们从 C5444的 Currently, several types of Azospirillum (Clostridium, Enterobacter, Alcaligenes and Pseudomonas) have been isolated from the rhizosphere of rice, but only a few reports describe in detail the ability of these bacteria to bind symbiotic nitrogen fixation with rice plants, Some questions have different opinions. We think it is necessary to do the following work: (1) to confirm that the nitrogen fixation is caused by the symbiosis of special bacteria and rice; (2) the nitrogen fixation activity of special bacteria must be improved by screening bacteria; (3) The ability to combine nitrogen fixation with bacteria. It has been reported that the Indian rice variety C5444 can induce higher acetylene reduction activity. Recently, we got from C5444