QUALITY CONTROL OF BIOINOCULANTS
- Quality control must
begin with the maintenance of Mother culture and Broth culture before
addition to the carrier and finished product.
- Inoculant
quality refers to the number of specific effective organisms in the
inoculant.
- The
Biofertilizer quality can be tested by using Serial dilution method.
Bureau of
Indian Standards (BIS) prescribed quality for Bioinoculants
Many
private companies are producing biofertilizer in the country and they have been
found vary in their quality. Hence, Bureau of Indian Standards (BIS) has
prescribed certain specification for the inoculants to maintain good quality.
They are as follows.
- The
Bioinoculant unit should contain adequate Microbiological lab and
qualified Microbiologist.
- The
inoculants should be a Carrier or Liquid or Beads based one.
- The
inoculants should contain a minimum of 108 cells/g or ml with
15 days of manufacture and 107 cells/g or ml within 15 days of
expiry.
- The
inoculants should have a maximum expiry period of 6 months from the date
of manufacture.
- The
inoculants should not have any contamination with other microorganisms.
- The
pH of the inoculants should be between 6.0 – 7.5.
- The
carrier material should be in the form of powder passing through 17 - 106
µ sieve that is peat, lignite, peat soil and humus materials neutralized
with CaCO3 and sterilized.
- The
manufacture should control the quality of the broth and maintain records
of test.
- The
inoculants should be packed in 50 - 75 µ low-density polythene bags.
- Each
pocket should give the following information’s.
a)
Name of product, specific name
b)
Name and address of the manufacturer
c)
Type of carrier/liquid
d)
Batch and code number
e)
Date of manufacture
f)
Date of expiry
g)
Net quantity
h)
Storage instructions words under ‘Store in a cool
place away from direct sun and heat’.
- The
above items should be printed on coloured ink background.
- The
pocket may be marked with ISI certification mark.
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