Screening of phosphorus and potassium decomposing bacillus and application of phosphorus and potassium decomposing bacillus to improvement on greenhouse vegetable soil hardening

Abstract

The invention relates to screening of phosphorus and potassium decomposing bacillus JJMSH1 and application of the phosphorus and potassium decomposing bacillus to improvement on greenhouse vegetable soil hardening. The strain has a good phosphorus and potassium decomposing function. The strain is screened from rhizosphere soil of a plant in a vegetable greenhouse; the soil is enriched through an organic phosphorus culture medium and then subjected to screening through an inorganic phosphorus culture medium and a silicate culture medium successively, and a molybdenum and antimony resistant colorimetric method and a flame photometry are used for detecting the contents of effective phosphorus and rapidly available potassium in sequence, thus finally selecting the JJMSH1 as an ideal strain. The JJMSH1 is authenticated by gram staining and spore staining to be gram-positive bacillus. When the strain disclosed by the invention is used for treating hardened soil in the greenhouse, the contents of the effective phosphorus and the rapidly available potassium in the soil are relatively obviously increased, and the OD600 reaches 1.5; after being diluted 100 times, a microbial inoculum is applied to the soil, so that the content of the effective phosphorus is increased by 35.7 percent, and the content of the rapidly available potassium is increased by 26.1 percent.

Description

technical field [0001] The invention is designed in the fields of agriculture and microorganisms, especially the strain has the effect of dissolving phosphorus and potassium, and can improve the phenomenon of soil compaction in greenhouses to a certain extent. Background technique [0002] Both phosphorus and potassium are essential nutrients for plant growth. Phosphorus is widely involved in plant photosynthesis and biochemical reactions in the body, and potassium is closely related to plant metabolism and growth. Phosphorus in the soil mainly exists in the form of organic phosphorus and inorganic phosphorus. Most of the organic phosphorus exists in the form of phytic acid, nucleic acid, and phospholipids, which cannot be absorbed directly. It must be transformed into the form of inorganic phosphorus under the action of microorganisms to be absorbed. More than 95% of the phosphorus in the soil cannot be directly absorbed and utilized by plants. The soluble potassium conten...

AI Technical Summary

Problems solved by technology

However, with the accumulation of cultivation time and improper fertilization techniques, soil compaction is easy to occur, which seriously affects the sustainable development of greenhouse vegetables.

Images