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Effect of Rhizobial Inoculation with Indigenous and
Commercial Strains on Nodulation, Biomass...
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INTRODUCTION
➢ Cowpea (Vigna unguiculata (L) Walp) is an important
vegetable and grain legume...
www.iita.org I www.cgiar.org
OBJECTIVES
➢ To identify indigenous elite strain of cowpea
rhizobia
➢ To evaluate their symbi...
www.iita.org I www.cgiar.org
MATERIALS AND METHODS
➢ Experimental Site
• Screen house of the IAR/ ABU, Zaria.
➢ Soil Sampl...
www.iita.org I www.cgiar.org
MATERIALS AND METHODS CONT.
➢ Screenhouse Experiment
• Five indigenous rhizobia strains SAMFI...
www.iita.org I www.cgiar.org
MATERIALS AND METHODS CONT
• The experiment was carried out on four (4)
genotypes of cowpea
I...
www.iita.org I www.cgiar.org
MATERIALS AND METHODS CONT
➢ Root nodules and plant
shoot were sampled at
eight weeks after
s...
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RESULT
0.000
0.100
0.200
0.300
0.400
0.500
0.600
0.700
0.800
0.900
1.000
SAMFIX605 SAMFIX618 ...
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RESULT
0.00
5.00
10.00
15.00
20.00
25.00
30.00
SAMFIX605 SAMFIX618 SAMFIX624 SAMFIX659 SAMFIX...
www.iita.org I www.cgiar.org
RESULT
0.00
100.00
200.00
300.00
400.00
500.00
600.00
700.00
SAMFIX605 SAMFIX618 SAMFIX624 SA...
www.iita.org I www.cgiar.org
RESULT
0.00
100.00
200.00
300.00
400.00
500.00
600.00
SAMFIX605 SAMFIX618 SAMFIX624 SAMFIX659...
www.iita.org I www.cgiar.org
CONCLUSION
➢ The indigenous strain gave higher
• nodule dry weight with UAM09 1051-1 and
• sh...
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Acknowledgement
➢ The authors express their sincere appreciation to
N2Africa/IITA for their s...
www.iita.org I www.cgiar.org
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Effect of Rhizobial Inoculation with Indigenous and Commercial Strains on Nodulation, Biomass and Nitrogen Fixation of Cowpea Genotypes in Northern Guinea Savanna of Nigeria

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To identify indigenous elite strain of cowpea rhizobia and to evaluate their symbiotic effectiveness in Biological Nitrogen Fixation (BNF).

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Effect of Rhizobial Inoculation with Indigenous and Commercial Strains on Nodulation, Biomass and Nitrogen Fixation of Cowpea Genotypes in Northern Guinea Savanna of Nigeria

  1. 1. www.iita.org I www.cgiar.org Effect of Rhizobial Inoculation with Indigenous and Commercial Strains on Nodulation, Biomass and Nitrogen Fixation of Cowpea Genotypes in Northern Guinea Savanna of Nigeria By Muhammad N. Isa1,2, A. A. Yusuf1 N. Kamai2 and M. Dianda2 1Department of Soil Science, Faculty of Agriculture, Ahmadu Bello University, Zaria. 2International Institute of Tropical Agriculture, Ibadan 1
  2. 2. www.iita.org I www.cgiar.org INTRODUCTION ➢ Cowpea (Vigna unguiculata (L) Walp) is an important vegetable and grain legume crop ➢ Its grain and haulm are highly valued for food and forage ➢ Biological nitrogen fixation (BNF) is a cheap and environmentally friendly source of N for plant ➢ High N2 fixation requires the presence of adequate numbers of highly effective rhizobia in the soil 2
  3. 3. www.iita.org I www.cgiar.org OBJECTIVES ➢ To identify indigenous elite strain of cowpea rhizobia ➢ To evaluate their symbiotic effectiveness in Biological Nitrogen Fixation (BNF) 3
  4. 4. www.iita.org I www.cgiar.org MATERIALS AND METHODS ➢ Experimental Site • Screen house of the IAR/ ABU, Zaria. ➢ Soil Sampling • Bulk soil sample collected from IAR research field was used for the experiments. 4
  5. 5. www.iita.org I www.cgiar.org MATERIALS AND METHODS CONT. ➢ Screenhouse Experiment • Five indigenous rhizobia strains SAMFIX 605, SAMFIX 618, SAMFIX 624, SAMFIX 659 and SAMFIX 679. • Two commercial strains BR 3262 and BR 3267 • Two controls (uninoculated and with nitrogen only) • A reference crop (maize [SAMMAZ-14]) 5
  6. 6. www.iita.org I www.cgiar.org MATERIALS AND METHODS CONT • The experiment was carried out on four (4) genotypes of cowpea I. UAM09 1051-1 II. UAM09 1055-6 III. IT99K-573-1-1 IV. IT89KD-288 • The pots were arranged in a randomized complete block design (RCBD) with three replications 6
  7. 7. www.iita.org I www.cgiar.org MATERIALS AND METHODS CONT ➢ Root nodules and plant shoot were sampled at eight weeks after sowing (WAS) for. • Nodulation • Biomass assessment • nitrogen uptake • biological nitrogen fixation 7
  8. 8. www.iita.org I www.cgiar.org RESULT 0.000 0.100 0.200 0.300 0.400 0.500 0.600 0.700 0.800 0.900 1.000 SAMFIX605 SAMFIX618 SAMFIX624 SAMFIX659 SAMFIX679 BR3262 BR3267 CONTROL MINERALN noduledryweight(g)/plant rhizobium strain UAM09 1051-1 UAM09 1055-6 IT99K-573-1-1 IT89KD-288 SE=0.0703 Interaction between cowpea genotypes and rhizobium strain on nodule dry weight 8
  9. 9. www.iita.org I www.cgiar.org RESULT 0.00 5.00 10.00 15.00 20.00 25.00 30.00 SAMFIX605 SAMFIX618 SAMFIX624 SAMFIX659 SAMFIX679 BR3262 BR3267 CONTROL MINERALN shootdryweight(g)/plant rhizobium strain UAM09 1051-1 UAM09 1055-6 IT99K-573-1-1 IT89KD-288 Interaction between cowpea genotypes and rhizobium strain on shoot dry weight 9 SE=0.960
  10. 10. www.iita.org I www.cgiar.org RESULT 0.00 100.00 200.00 300.00 400.00 500.00 600.00 700.00 SAMFIX605 SAMFIX618 SAMFIX624 SAMFIX659 SAMFIX679 BR3262 BR3267 CONTROL Nuptake(mg)/plant Rhizobium Strain UAM09 1051-1 UAM09 1055-6 IT99K-573-1-1 IT89KD-288 SE=43.003 Interaction between cowpea genotypes and rhizobium strain on nitrogen uptake 10
  11. 11. www.iita.org I www.cgiar.org RESULT 0.00 100.00 200.00 300.00 400.00 500.00 600.00 SAMFIX605 SAMFIX618 SAMFIX624 SAMFIX659 SAMFIX679 BR3262 BR3267 CONTROL Nitrogenfixation(mg)/plant RhizobiumStrain UAM09 1051-1 UAM09 1055-6 IT99K-573-1-1 IT89KD-288 SE=40.403 Interaction between cowpea genotypes and rhizobium strain on nitrogen fixation 11
  12. 12. www.iita.org I www.cgiar.org CONCLUSION ➢ The indigenous strain gave higher • nodule dry weight with UAM09 1051-1 and • shoot dry weight with IT89KD-288 ➢ N uptake and BNF was highest with the commercial strain with IT89KD-288 12
  13. 13. www.iita.org I www.cgiar.org Acknowledgement ➢ The authors express their sincere appreciation to N2Africa/IITA for their support. 13
  14. 14. www.iita.org I www.cgiar.org 14

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