Understanding phosphate solubilizer microbial fertilizer

Phosphorus-dissolving microbial fertilizer

Phosphorus is one of the three major nutritional elements of crops. According to the survey, the area of ​​phosphorus deficiency in China's soil is relatively large, accounting for about two-thirds of the total cultivated area. In addition to the artificial application of chemical phosphate fertilizers, it is applied to microbial fertilizers that can decompose insoluble phosphorus in the soil and cause it to form in the crop rhizosphere. A micro-region with sufficient supply of phosphorus is also an important way to improve crop phosphorus supply. Such microbial fertilizers have a large area of ​​application in China and have shown certain results in agricultural production, and their application prospects are promising.

(I) Application basis of phosphate-solubilizing microbial fertilizer

Some kinds of microorganisms in the soil can produce some organic acids during growth and reproduction and metabolism, such as lactic acid, citric acid, and some enzymes, such as plant enzyme substances, to immobilize insoluble phosphorus fixed in the soil such as iron phosphate and aluminum phosphate. As well as organic phosphates mineralized into soluble phosphorus that can be absorbed by crops for use by crops. Artificially-producing methods are used to produce microorganisms with strong ability to decompose and insolubilize, which are separated and selected in the laboratory, under industrial fermentation conditions to produce microbial fertilizers that are applied to the field to improve crop phosphorus supply and promote crop growth. To increase production.

(B) Phosphorus-solubilizing microorganisms

There are many types of microorganisms that can decompose insoluble phosphorus compounds, and they are also more complicated. According to their decomposed substrates, some people classify them into organophosphorus-decomposing microorganisms and inorganic phosphorus-degrading microorganisms, but the basis for this division is not sufficient. The current research and application mainly includes some of the following genera.

Bacillus (b.megatherium), b. subtilis, b. pumilis, b. brevis, Bacillus circulans (b. Circulans), b. cereus, b. mucilaginosus;

Panibacillus such as p. polymyxa;

Pseudomonas such as ps. fluorescens, ps. radiobacter, ps. herba, Pseudomonas syringae ps. Gracilis);

Some species of Arthrobacter arthrobacter spp.

Some species of chromobacter chromobacterspp.

Some species in the mycobacterium genus;

Thiobacillus thiobacillus thiooxidans

Some species in the genus Baenibacillus (paenibacillus);

Some species of fungi: such as penicillum bilaii.

The earliest and currently most widely used phosphate-solubilizing microorganism in production is b.megatherium. The typical characteristic of Bacillus megaterium is Gram-positive and strictly aerobic. On nutrient agar medium, the cells are columnar to elliptical or pear-shaped. The size of bacteria is generally 1.2-1.5 μm in width and 2-5 μm in length. Tends to distort the short chain; no more than 1 heat-resistant spores are formed in the sporangia, which are mesophilic and terminally shaped; the shapes are oval or circular; colonies grow abundantly, do not expand, and are glossy or relatively Dark, sometimes slightly wrinkled, usually yellowish in late growth period, long-term culture of growth and medium can turn brown or black; contact enzymes are positive; hydrolyzed starch and casein; vp reaction and yolk reaction are negative.

It is worth noting that some species of Bacillus cereus and Pseudomonas are animal and plant pathogenic bacteria. Therefore, they should be clearly identified as producing strains of such microorganisms. At least the species must be identified and identified as non-pathogenic. application. Phosphorus-dissolving fungi are not well resolved due to industrial production problems and their use is limited.

(III) Production and Application of Phosphorus-solubilizing Microorganism Fertilizer

The production of phosphate-solubilizing microbial fertilizers is the same as the production and quality requirements of general microbial fertilizers, mainly solid adsorbent types. Since some strains produce spores, they also produce spore powder. Spore powder has the advantages of being easy to use and long shelf life.

Some problems that need to be paid attention to in the application of phosphate-solubilizing microbial fertilizers are as follows: (1) The extent and environment of phosphate-solubilizing should be known, and it is generally better to be used in soils that are deficient in phosphorus and rich in organic matter. 2 It works well with phosphate rock powder. 3 The use of combined compost is better than single application, that is, the phosphorus-removing microbial fertilizer is firstly added to the compost to exert its decomposition effect, and then the compost is turned into the soil. 4 If different types of phosphate-solubilizing bacteria do not antagonize each other, they can be used in combination.

Phosphorus-solubilizing microbial fertilizers have been used in China for many years. It should be said that there are good prospects for application, but development is not fast and applications are not universal. The reasons are various, among which the important ones are many types of phosphate-solubilizing microorganisms, and the mechanism of phosphate-solubilizing is not the same and more complex. Although there are some studies, it is not profound; the activity and growth and deceleration of these microorganisms after they are applied to the soil The conditions for playing are not very clear; in addition, the quality of the fungicide cannot be guaranteed, and production and application are therefore very limited.

Pharmaceutical Intermediates

We are a manufacturer and supplier of raw materials and intermediates for pharmaceuticals. Our focus is on providing customers with high quality, fair priced products, coupled with our broad range of technical know-hows on fundamentals, vast industrial experience on applications, professional expertise on health and safety, and efficient logistics on customer services. Our intermediates products range covers many different kinds of API, we have established good market for our intermediates in India, Korea and EU. Our strong products are Ziprasidone Intermediates, Ibrutinib Intermediates, Lcz696 Intermediates , Palbociclib Intermediates and Tazobactam intermediates. All of our products are with stable production and strict quality control, making sure your experience with Sunshine Biotech is always enriching, satisfying and fulfilling.

Pharmaceutical Intermediates

Pharmaceutical Intermediates,Ziprasidone Intermediate,Palbociclib Intermediate,Lcz696 Intermediate

Nanjing Sunshine Biotech Co., Ltd , http://www.sunshine-bio.com