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A comparative study of the efficacy of Biofertilizer and chemical fertilizer on
Rice
A comparative study of the efficacy of Biofertilizer and chemical fertilizer on
Rice
Neethu KannanII yr BotanyDept. of BotanyMercy College, Palakkad
Why Biofertilizers?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.
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.
Biofertilizers Vs Chemical Fertilizers
Biofertilizers Vs Chemical Fertilizers
Increased productivity
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 7mm02-01-08 22cm 4.0mm 36cm 4.5mm 42cm 8.5mm09-01-08 30cm 4.1mm 37cm 5mm 45cm 10mm
1-01-08 7 35cm 4.2mm 39cm 7mm 48cm 12mm
Tabulation of Experimental results
0
10
20
30
40
50
Leng
th in
cm
11/12/2007 19-12-07 2/1/2008 9/1/2008 17-01-08
Date
Comparison of Length of the plant
Reference
By addingChemicalfertilizerBy addingBiofertilizer
0
20
40
6080
100
120
140 By addingbiofertilizer
By addingchemicalfertilizerReference
Comparison of Plant length
Width in mm
0
2
4
6
8
10
12
Wid
th in
Mill
imet
er
11/12/2007 19-12-07 2/1/2008 9/1/2008 17-01-08
Date
Comparison of Width of the plant
Reference
By addingChemicalfertilizerBy addingBiofertilizer
0
5
10
15
20
25
11/1
2/20
07
19-1
2-07
2/1/
2008
9/1/
2008
17-0
1-08
Date
Wid
th in
mill
ime
tre
By addingbiofertilizer
By addingchemicalfertilizer
Reference
Comparison of the Plant leaf width
Comparison of weight of grains
0
0.05
0.1
0.15
0.2
0.25
0.3
0.35
1
Pots
Weight in grams
Reference
By adding Chemical
fertilizer
By adding Biofertilizer
0
0.05
0.1
0.15
0.2
0.25
0.3
0.35
Reference By adding Chemical fertilizer By adding Biofertilizer
Pots
Weight of Grains in grams
Comparison of productivity
Anatomical differences
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).