在田间条件下,小麦接种联合同氮菌W—43、W—432、W—91菌株,对小麦营养生长有明显促进作用,主要表现在单株次生根多0.8—1.0条,单株分蘖增加0.35—0.48个;旗叶面积增加1—3平方厘米,叶绿素含量提高12%,株高1—3厘米,每亩有效穗增加2.2—3.2万个,穗粒数增加1.4—1.5粒,千粒重增加1.4—1.5克,单产提高20.1—46.4公斤,增产率6.6—14.2%,同时改善小麦品质. Under the field conditions, wheat inoculation combined with nitrogen-fixing bacteria W-43, W-432 and W-91 strains significantly promoted the vegetative growth of wheat, which was mainly manifested by the increase of 0.8-1.0 secondary root per plant and the increase of single tiller 0.35-0.48; flag leaf area increased by 1-3 square centimeters, chlorophyll content increased by 12%, plant height 1-3 cm, the effective panicle per acre increased 2.2-3.2 million, grain number increased 1.4-1.5 grain, 1000 grain weight increased 1.4-1.5 grams, yield increased 20.1-46.4 kg, yield 6.6-14.2%, while improving the quality of wheat.