Plant Phosphorus Solubilizing and Nitrogen Fixing Growth-promoting Bacteria and Its Bacterial Agent and Application Used in Rocky Desert Area

Abstract

The invention discloses a phosphorus-solubilizing and nitrogen-fixing bacterium, which is classified as Acinetobacter calcoaceticus PMN1501 and is preserved in the China Typical Culture Collection Center. The strain preservation number is CCTCC NO: M2016313, and the preservation date is June 7, 2016. . The phosphorus-solubilizing and nitrogen-fixing bacteria provide nitrogen and phosphorus application to crops in soil, so as to alleviate growth inhibition caused by nitrogen and phosphorus deficiency. The application of the microbial nitrogen-fixing bacteria in the rocky desert area as a growth-promoting agent for phosphorus-solubilizing and nitrogen-fixing. The invention can not only alleviate the growth inhibition of crops under the stress of nitrogen deficiency and phosphorus deficiency, but also significantly promote the growth of crop seedlings. The number of leaves, root volume, plant volume, aboveground fresh dry weight, underground fresh dry weight, plant fresh dry weight, root-to-shoot ratio (R / T) and dry-to-fresh ratio (D / F) were all significantly increased.

Description

technical field [0001] The invention relates to a plant phosphorus-solubilizing and nitrogen-fixing growth-promoting bacterium that can be used in rocky desert areas, its agent and its application, and belongs to the technical field of microorganisms. Background technique [0002] As essential mineral elements for plants, nitrogen and phosphorus are important components of various structural and functional substances such as proteins, nucleic acids, phospholipids, enzymes, and plant hormones in plant living cells. It plays an important role in the process of gene expression and regulation and cell signal transduction. The lack of nitrogen and phosphorus will inhibit the growth and development of plants, cause some deficiencies, and even fail to complete their life cycle. Long-term large-scale application of chemical fertilizers not only increases the cost of agricultural production, but also causes the selective accumulation of certain elements in the soil and the deteriora...

AI Technical Summary

Problems solved by technology

Although the efficiency of symbiotic nitrogen fixation by rhizobia is higher than that of combined nitrogen fixation, it has a high degree of host specificity, which limits its application in non-host leguminous forages and non-legume forages

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