What are the quality standards for biofertilizers?

What are the quality standards for biofertilizers?

5. Quality standards for Rhizobium and Azotobacter

Parameters Rhizobium Biofertilizer
Cell no. at the time of expiry date 107/g carrier within 15 days before expiry date
Expiry date 6 months from the date of manufacture
Permissible contamination level No contamination at 108 dilution
pH 6.0–7.5

How do you make liquid biofertilizer?

The liquid biofertilizer is produced by fermentation process and the quality needs to be controlled. Bacillus subtilis, aerobe bacterium growing well in temperature ranging from 30 to 37°C, can fix nitrogen gas (N2) to ammonium form.

What is liquid biofertilizer?

The liquid Bio-fertilizers (LBF) are suspensions having useful microorganisms, which fix atmospheric nitrogen and solubilise insoluble phosphates and make it available for the plants. LBFs are sold to farmers under the brand name “Anubhav liquid Bio-fertilizers” by the University.

What are the factors required for quality control of biofertilizer?

5. Quality standards for Rhizobium and Azotobacter

Parameters Rhizobium Biofertilizer
Permissible contamination level No contamination at 108 dilution
pH 6.0–7.5
Strain Should be checked serologically
Carrier Should pass through 150–212 microns IS sieve

What is the shelf life of biofertilizers?

The shelf-life of common solid carrier based biofertilizers is around six months; however, it could be as high as two years for a liquid formulation [3,4]. Further, solid carrier based biofertilizers are less thermo-tolerant whereas; liquid formulations can tolerate the temperature as high as 55°C [3,5].

How are biofertilizers produced?

Solid-state fermentation and submerged fermentation are two main types of fermentation, used for the production of biofertilizers. Each type of biofertilizer is prepared by selection of efficient microbial strain, its cultivation using specific nutrient medium, scale-up, and formulation using solid or liquid base.

How liquid fertilizer is made?

In general, clear liquid fertilizers are made by dissolving ammonium nitrate and urea in water and adding thereto various other soluble phosphates and potassium salts.

How do you preserve liquid fertilizer?

For preservation and odour you can add only 100-200 mg/ kg of sodium benzoate within your organic fertilizers. The methanol can also be used for that purpose but quantity of methanol should be 50-100 mg/kg of Bio fertilizers, But after add methanol the container should be air tight for min. 5 hrs.

How do you use liquid Biofertilizer?

For such direct soil applications, biofertilizer is mixed with carriers like soil, compost, farmyard manure, rice husks or lignite (1kg per 25kg of carrier) and then directly put in the soil. The applied area needs to be irrigated immediately. The liquid biofertilizers are applied by spraying or by fertigation.

Why liquid biofertilizers are superior than powder ones?

The advantages of liquid biofertilizers over conventional carrier based biofertilizers are: longer shelf life (12- 24 months), no effect of high temperature and no contamination, no loss of properties due to storage at high temp.

What is the procedure of mass production of biofertilizers?

Large Scale Production of Biofertilizers

  1. Preparation of Broth Cultures: Prepare liquid medium for respective organisms.
  2. Preparation of Carrier: The carrier should have following characters:
  3. Preparation of Inoculate i.e. mixing:
  4. Curing or Maturation:
  5. Filling and Packing:
  6. Quality Checking:
  7. Storage:

How do you use liquid biofertilizers?

The biofertilizer is applied at the rate of 100gm per 5Kg of seeds. The per acre application rate is determined from the amount of seed to be sown in a field. Before the application, biofertilizer is mixed in water (1:2) to form slurry. The slurry is poured in container with seeds to be sown.