Paenibacillus mucilaginosus and Bradyrhizobium japonicum, as microbial fertilizer production strains, are widely used in agricultural production by features of their good effect of dissolving potassium, dissolving phosphorus and promoting growth and symbiotic nitrogen fixation.
Paenibacillus mucilaginosus as a plant growth-promoting rhizobacteria (PGPR), it can release potassium, produce organic acids, amino acids, hormones and other substances, improve plant nutrition and promote plant growth.
The application of paenibacillus mucilaginosus can increase soil enzyme activity and improve soil microflora to improve soil fertility, significantly improve peanut growth traits, and achieve a 10.4% increase in peanut yield when the conventional fertilization amount is halved.
Paenibacillus mucilaginosus also can improve soil ecology, increase the content of soil available phosphorus, alkali-hydrolyzed nitrogen and available potassium, and increase yield.
Bradyrhizobium japonicum fix nitrogen through symbiosis with legumes to provide nitrogen nutrition to plant, increase soybean yield, and its metabolites such as organic acids can also complex minerals such as iron, phosphorus, and magnesium.
The use of bradyrhizobium japonicum can change the primary and secondary metabolites of soybean seeds, increase the contents of organic acids, fatty acids and volatile substances, and thus improve the metabolism, antioxidant and resistance of soybean seeds.
Paenibacillus Mucilaginosus & Bradyrhizobium Japonicum
Paenibacillus mucilaginosus itself is widely used in agriculture. In addition to its own disease resistance and growth promotion, compound inoculation with rhizobia can also promote rhizobia nodulation and nitrogen fixation, and through synergy, improve soil fertility and nutrient use efficiency.
The metabolites of PGPR play a role in promoting the nodulation of nitrogen-fixing bacteria, including increasing the number of nodules and promoting root development, seedling growth, improve photosynthesis ability, etc.
Co-inoculation of Paenibacillus mucilaginosus and bradyrhizobium japonicum is a complex process.
Affected by many factors, the application of PGPR can directly affect the soil microbial community structure and soil microbial activity, and also affect soil fertility by changing the physical properties and chemical composition of the soil, thereby affecting the growth status of aboveground vegetation and crop quality.
In our Field Trial: Under compound inoculation, the grain weight, harvest index, stem, leaf and grain nutrient content of soybean were the highest, and compound inoculation could increase soybean yield and improve soybean quality.
In terms of soil fertility, compound inoculation can improve soil total nitrogen, available phosphorus, available potassium and organic matter content, with a longer-lasting effect and less impact on soil pH.
Compound inoculation can also enrich the diversity of soil microbial community, increase the total amount of microorganisms, increase the number of bacteria and actinomycetes, and inhibit the growth of fungi, which is conducive to the transformation of soil from “fungal type” to “bacterial type”.