小麦接种联合固氮菌增产效果研究

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.

Research on Wheat Yield Increasing Effect by Inoculation of Associated Nitrogen Fixing Bacteria

Under the normal field conditions the wheat was inoculated with W-43, W-432, W-91 strains of the associated nitrogen-fixation bacteria for three consecutive years. The result of the test shows that inoculating with an appropriate quantity of bacteria has a remarkable promotion to the vegetative growth,which is mainly indicated as the increase of 0.8-1.0 secondary root in a single plant, of 0.35-0.48 tiller in a single plant,of 1-3cm2 in the area of a flag leaf,and of 12% in chlorophyll content. The plant increases by 1-3cm in height,its effective ears 22000 -33000/mu,the number of grain in an ear 1.4-1.5 grain, the weight of a thousand grains 1.4-1.5g,the per unit area yield 20.1-46.4kg/mu,and the rate of increase in yield is 6.6-14.2%.At the same time,the quality of wheat is improved.