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Azolla an aquatic fern is regarded as

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INTRODUCTION Azolla an aquatic fern is regarded as Live Nitrogen Manufacturing Factory because, it harbors nitrogen fixing Cyanobacteria. – PowerPoint PPT presentation

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Title: Azolla an aquatic fern is regarded as


1
INTRODUCTION
Azolla an aquatic fern is regarded as Live
Nitrogen Manufacturing Factory because, it
harbors nitrogen fixing Cyanobacteria. Azolla has
been extensively used both as biofertilizer and
green manuring for rice cultivation in the South
East Asian countries. More than 50 nitrogen can
be supplemented when Azolla dual cropped with
rice.
2
Azolla as a component of INM
HOMESTEAD AZOLLA CULTIVATION
3
CHARACTERISTICS OF AZOLLA
Azolla fern is Live Nitrogen Manufacturing
Factory Harbors N fixing Cyanobacteria Anabaena
azollae. Extensively used as biofertilizer and
green manuring for rice cultivation Azolla has
very fast growing character It doubles its
biomass in 3-5 days Azolla fixes 40-60 kg N/ha
in rice crop Azolla dual cropping enhance rice
yield by 55 and supplement nitrogen by 50
4
AZOLLA RICE DUAL CULTURE
Field multiplication
Rice-Azolla
Azolla dual with rice can save 50 of
nitrogen requirement
5
AZOLLA DUAL CROPPING WITH RICE
AZOLLA DUAL CROPPING ENHANCE YIELD BY 41
PER CENT OVER NO AZOLLA TREATMENT
6
Azolla success story of S E Asia
Azolla Collection
Azolla Collection
NATURAL BLOOM
Selling at market
Collecting on dykes
Transportation
7
MASS MULTIPLICATION OF AZOLLA
HOMESTEAD METHOD
Prepare pit 2m length,1m width 20cm
depth Spread polythene sheet (2.6mx1.6m) over the
pit Add SSP (10g), MOP (10g) , dry cow dung
(100g) Azolla 300 g Mud plastering the
surroundings pour water level (10 cm ) Multiply
for 15 days. Harvest and repeat the above
procedure
8
FIELD METHOD FOR AZOLLA MULTIPLICATION
Prepare and level the field uniformly Divide the
field into 20x5m providing suitable bunds
irrigation channel Maintain 10 cm water
depth Add 10 kg cowdung8kg Azolla100 gm SSP
/plot Harvest after 15 days
9
LET US SUM UP
Azolla is an aquatic fern and it harbors
nitrogen fixing Cyanobacterial symbiont Anabaena
azollae. Azolla has been extensively used both
as biofertilizer and green manuring for rice
cultivation in the South East Asian
countries. Azolla dual cropping with rice along
with 50 recommended fertilizers could enhance
rice yield by 55 over control.
contd
10
contd More than 50 nitrogen can be
supplemented when Azolla dual cropped with rice.
Cost effective
Azolla multiplication can be done both under
homestead and field methods. Azolla can also be
used as organic feed supplement
11
ASSESSMENT
Q. Write true or false i) Azolla is used
extensively as biofertilizer for rice ii) Azolla
can be regarded both as biofertilizer as well as
green manure crop iii) Azolla-rice dual culture
is very prevalent in South Asian coutries. iv)
Azolla can supplement about 50 of nitrogen
requirement by the rice crop v) Azolla can be
mass multiplied using low cost technology.
12
ASSESSMENT
Model answers i) True ii) True iii)
False iv) True v) True
13
REFERENCES
i) Soil Microbiology
N. S.Subba Rao ii) Advances in Microbiology
N. S.Subba Rao iii)
Bio-fertilizer and Organic Farming NIIR
Board iv) Nitrogen fixing organisms (Pure
and applied aspects) J. I. Sprent
and P. Sprent
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