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BGA as a component of INM_2

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					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 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 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 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 COMPONENT OF INM
        Blue Green Algal Species
  BLUE GREEN ALGAE AS COMPONENT OF INM
              ALGALIZATION EFFECT ON PADDY
      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

                     BGA SUPPLEMENT NITROGEN
                         IN ACHIEVING YIELD
                      EQUIVALENT TO MINERAL
                          NITROGEN ALONE
BLUE GREEN ALGAE AS COMPONENT OF INM

       BLUE GREEN ALGAE



                          Fix
                     atmospheric
                       nitrogen


     Increase rice     BLUE         Contribute
       yield by       GREEN        25- 30 kg N
       10-15 %        ALGAE        /ha /season
                      Secrete
                     Vitamins &
                     hormones
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 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 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 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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posted:8/18/2012
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