BLUE GREEN ALGAE AS A COMPONENT OF INM
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BLUE GREEN ALGAE AS A COMPONENT OF INM. BLUE GREEN ALGAE AS COMPONENT OF INM. INTRODUCTION. Cyanobacteria (BGA) can be found in almost every conceivable environment.

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BLUE GREEN ALGAE AS A COMPONENT OF INM

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Blue green algae as a component of inm

BLUE GREEN ALGAE AS A COMPONENT OF INM


Blue green algae as a component of inm

BLUE GREEN ALGAE AS COMPONENT OF INM

INTRODUCTION

Cyanobacteria (BGA) can be found in almost every conceivable environment.

Blue green algae are photosynthetic Cyanobacteria and promote the growth of lowland paddy by supplying fixed nitrogen through exudation.

BGA application @ 10 kg/ha one week after rice transplantation contribute 25 - 30 kg N /ha /season with a yield enhancement of 10-15 percent.

Besides fixing nitrogen, these algae excrete vitamins and hormones, which may also contribute to the growth of rice plants.


Blue green algae as a component of inm

BLUE GREEN ALGAE AS COMPONENT OF INM

Blue green algae found in almost every environment, from oceans to fresh water to bare rock to soil. They occur as plantonic cells or form phototrophic biofilm in marine environments, in damp soil, moistened rocks ,deserts


Blue green algae as a component of inm

BLUE GREEN ALGAE AS COMPONENT OF INM

Blue green algae are photosynthetic .

Cyanobacteria ,promote the growth of lowland paddy by supplying nitrogen.

BGA strains used for biofertilizer are Anabaena variabilis,Nostoc muscorum, Aulosira fertilissima and Tolypothrix tenuis.

BGA application @ 10 kg/ha one week after rice transplantation contribute 25 - 30 kg N /ha /season with a yield increase of 10-15 percent.

Blue green algae excrete vitamins and hormones, which  enhance rice growth. BGA also enhances soil fertility


Blue green algae as a component of inm

BLUE GREEN ALGAE AS COMPONENT OF INM

CHARACTERISTICS OF BLUE GREEN ALGAE

Cyanobacteria include unicellular and colonial form.

Colonies form filaments, sheets , hollow balls.

Filaments differentiate into vegetative cells,

heterocysts and resistant spores.

Heterocyst is the site of nitrogen fixation .

Heterocyst fix nitrogen into ammonia and nitrate Nitrate and ammonia are absorbed by plants.


Blue green algae as a component of inm

BLUE GREEN ALGAE AS COMPONENT OF INM

Blue Green Algal Species


Blue green algae as a component of inm

Treatment

Grain yield (q/ha)

2000

2001

2002

Control

34.27

39.64

45.61

40 kg N/ha

46.50

42.58

50.73

80 kg N/ha

50.67

45.84

53.80

120 kg N/ha

53.10

47.84

55.30

BGA

43.70

40.17

48.60

BGA + 40 kg N/ha

51.57

48.04

52.70

BGA + 80 kg N/ha

54.70

51.06

55.80

BGA + 120 kg N/ha

-

51.42

56.70

BLUE GREEN ALGAE AS COMPONENT OF INM

ALGALIZATION EFFECT ON PADDY

BGA SUPPLEMENT NITROGEN IN ACHIEVING YIELD EQUIVALENT TO MINERAL NITROGEN ALONE


Blue green algae as a component of inm

BLUE GREEN ALGAE AS COMPONENT OF INM

BLUE GREEN ALGAE

Fix atmospheric nitrogen

Contribute 25- 30 kg N /ha /season

BLUE GREEN ALGAE

Increase rice yield by

10-15 %

Secrete

Vitamins & hormones


Blue green algae as a component of inm

BLUE GREEN ALGAE AS COMPONENT OF INM

MASS PRODUCTION OF BGA CULTURE

Shallow trays (2m x 1m) of galvanized sheet

Spread 8-10 kg soil plus 200 g SSP

Add water (5-15cm)

Sprinkle algal culture

Expose to sunlight


Blue green algae as a component of inm

BLUE GREEN ALGAE AS COMPONENT OF INM

MASS PRODUCTION OF BGA CULTURE

Thick algal mat forms at 15 days

Allow water to evaporate

Collect dry algal flakes

Make into powder and pack in polybags


Blue green algae as a component of inm

BLUE GREEN ALGAE AS COMPONENT OF INM

LET US SUM UP

Blue green algae are photosynthetic .

They form phototrophic biofilm in fresh water and marine environments, in damp soil.

Promote the growth of lowland

paddy by supplying fixed nitrogen

through exudation.

Blue green algae also excrete vitamins and hormones, which may also contribute to the growth of rice plants.

contd…


Blue green algae as a component of inm

BLUE GREEN ALGAE AS COMPONENT OF INM

LET US SUM UP

BGA application @ 10 kg/ha one week after rice transplantation contribute 25 - 30 kg N /ha /season with a yield enhancement of 10-15 percent.

Indian rice fields also harvours different BGA species – Anabaena, Nosto, Cylindrospermum, Westolliopsis, etc.


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