1. A comparative study of
the efficacy of Biofertilizer
and chemical fertilizer on
Rice
Neethu Kannan
II yr Botany
Dept. of Botany
Mercy College, Palakkad

2. Why Biofertilizers?
Chemical fertilizers run into the following
disadvantages
 Not environmentally viable as the fertilizers are
produced from non-renewable raw material.
 Efficiency lesser than other alternative – nearly 60%
lesser.
 The issues of pollution is overwhelming.
 Cost of chemical fertilizers are high.
 Chemical fertilizers most effective with irrigated
land but not dry lands.
 Indiscriminate use of chemical fertilizers deteriotes
soil health.

3. Objectives of the studyObjectives of the study
 To compare efficiency of Azotobacter
sp based
biofertilizers with chemical fertilizer.
 To study the biomass increase with
respect to
Morphological, Physiological and
Anatomical variations.

4. Biofertilizers Vs Chemical Fertilizers

5. Biofertilizers Vs Chemical Fertilizers

6. Increased productivity

7. Date
11-12-07
Without adding
any fertilizer
(reference)
By adding
chemical
fertilizer
By adding
biofertilizers
length width length width length width
15cm 3.3mm 22cm 3.9mm 26cm 6mm
19-12-07 20cm 3.8mm 32.5cm 4mm 34cm 7mm
02-01-08 22cm 4.0mm 36cm 4.5mm 42cm 8.5mm
09-01-08 30cm 4.1mm 37cm 5mm 45cm 10mm
1-01-08 7 35cm 4.2mm 39cm 7mm
48cm 12mm
Tabulation of Experimental results

8. 0
10
20
30
40
50
Lengthincm
11/12/2007 19-12-07 2/1/2008 9/1/2008 17-01-08
Date
Comparison of Length of the plant
Reference
By adding
Chemical
fertilizer
By adding
Biofertilizer

9. 0
20
40
60
80
100
120
140
11/12/2007
19-12-07
2/1/2008
9/1/2008
17-01-08
By adding
biofertilizer
By adding
chemical
fertilizer
Reference
Comparison of Plant length
Width in mm

10. 0
2
4
6
8
10
12
WidthinMillimeter
11/12/2007 19-12-07 2/1/2008 9/1/2008 17-01-08
Date
Comparison of Width of the plant
Reference
By adding
Chemical
fertilizer
By adding
Biofertilizer

11. 0
5
10
15
20
25
11/12/2007
19-12-07
2/1/2008
9/1/2008
17-01-08
Date
Widthinmillimetre
By adding
biofertilizer
By adding
chemical
fertilizer
Reference
Comparison of the Plant leaf width

12. Comparison of weight of grains
0
0.05
0.1
0.15
0.2
0.25
0.3
0.35
1
Pots
Weightingrams
Reference
By adding Chemical
fertilizer
By adding Biofertilizer

13. 0
0.05
0.1
0.15
0.2
0.25
0.3
0.35
Reference By adding Chemical fertilizer By adding Biofertilizer
Pots
WeightofGrainsingrams
Comparison of productivity

14. Anatomical differences

15. Conclusion
• Significant increase in biomass
production and grain productivity.
• Relatively more effective than chemical
fertilizers.
• Hence can be concluded with further
study that biofertilizer is a better
alternative to chemical fertilizers.
Supportive literature also confirms its
environmental safeness (effective
decomposition).