A high-efficiency phosphate-solubilizing Bacillus megaterium in the rhizosphere of forest trees and its application

Abstract

The invention discloses an efficient phosphate solubilizing bacillus megaterium in a tree rhizosphere. The preservation number is CCTCC NO. M 2017454, and the efficient phosphate solubilizing bacillusmegaterium is named as Bacillus megaterium L205. The test shows that the phosphate solubilizing amount of bacillus megaterium reaches 203.04mg / L, and the liquid bacterium can effectively solubilize insoluble inorganic phosphorus, increase the content of available phosphorus in red-yellow soil, and promote the growth of tree seedlings. The efficient phosphate solubilizing bacillus megaterium provided by the invention enriches the sink population of bacillus megaterium at the culture collection center and provides convenience for better exploitation of microbial population resources of bacillusmegaterium. Meanwhile, the bacillus megaterium strain L205 can secrete organic acids, solubilize inorganic phosphorus and improve the phosphorus absorption and utilization of plants, is especially suitable for the production of tree biological fertilizers and tree growth promoting bacteria in red-yellow soil areas in South China, and can be used for further developing compound microbial fertilizers and bacteria.

Description

technical field [0001] The invention belongs to the technical field of microorganisms, and in particular relates to a high-efficiency phosphorus-dissolving bacillus megaterium in the rhizosphere of forest trees and its application. Background technique [0002] The rhizosphere is a place where soil-root system-microorganisms closely interact and interact, and it is also an important part of the soil micro-ecosystem. Sperber et al. found that most of the phosphorus-dissolving microorganisms appeared in the rhizosphere soil of plants, and the rhizosphere phosphorus-dissolving bacteria and the root system had a mutual promotion effect. Most of the soil in China is in a state of phosphorus deficiency. More than 95% of the phosphorus in the soil in southern China is insoluble phosphorus and cannot be directly absorbed by plants. Phosphorus has become the main factor affecting plant growth. At the same time, most of the fast-growing and high-yielding forests in the south are arti...

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Problems solved by technology

At present, there are still relatively few domestic studies on phosphorus-dissolving bacteria in the rhizosphere of forest red-yellow soil, and the selected ones all come from the soil of cultivated land crops, and the application effect in forestry production is limited.

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