Complex microbial inoculant for promoting wheat growth and application thereof

Abstract

The invention discloses a complex microbial inoculant for promoting wheat growth and an application thereof. The complex microbial inoculant is prepared by mixing and fermenting an Azotobacter chroococcum N24 bacterial solution, a rhizobium radiobacter J16 bacterial solution and a Klebsiella quassicola P5 bacterial solution. According to the invention, nitrogen-fixing bacteria N24, potassium bacteria J16 and phosphate solubilizing bacteria P5 are separated from rhizosphere soil of wheat, the complex microbial inoculant prepared by mixing and fermenting the three bacterial solutions simultaneously has the functions of nitrogen fixation, phosphorus dissolution and potassium dissolution, the contents of available nitrogen, available phosphorus and available potassium in soil can be greatly increased, the plant height, the fresh weight, the dry weight, the nitrogen content, the phosphorus content and the potassium content of plants are remarkably increased, the plant growth is promoted, the use amount of chemical fertilizers is reduced, the crop yield is increased, and the method has important significance in agricultural production.

Description

technical field

[0001] The invention relates to the technical field of plant rhizosphere growth-promoting bacteria, in particular to a composite bacterial agent for promoting the growth of wheat and its application. Background technique

[0002] Nitrogen, phosphorus, and potassium are essential nutrients for plant growth and metabolic activities, and play a key role in the high yield of crops. Relevant literature shows that 95% of phosphorus in the soil combines with calcium, aluminum, iron and other ions to form insoluble compounds; while potassium and alkali metals such as sodium and calcium also exist in the form of aluminosilicate, which reduces the solubility of potassium. Therefore, the activated phosphorus and potassium elements that plants can absorb and utilize in the soil are less. In addition, although a large amount of chemical fertilizers are put into farmland every year, the utilization rate of these chemical fertilizers by plants is only about 35%, and the ex...

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