08-01-2013, 02:55 PM
Concepts of Bio-fertilizers
Concepts of Bio-fertilizer.ppt (Size: 3.2 MB / Downloads: 163)
INTRODUCTION
Biofertilizer technology is not a new concept.
It involves inoculation of beneficial microorganisms that help nutrient acquisition by plants through fixation of nitrogen, solubilization and mobilization of other nutrients.
Concept of biofertilizer
Biofertilizer concept goes back as early as 300 BC when our ancestors realized the importance of legume crops bearing nodules
The perspective of biofertilizer came into existence through discovery of many organisms capable of nitrogen fixation, P-solubilization, P. mobilization, potash solubilization and micronutrient transformation in the soil.
Advantages of Biofertilizers
Renewable source of nutrients
Sustain soil health
Supplement chemical fertilizers.
Replace 25-30% chemical fertilizers
Increase the grain yields by 10-40%.
Decompose plant residues, and stabilize C:N ratio of soil
Improve texture, structure and water holding capacity of soil
No adverse effect on plant growth and soil fertility.
Stimulates plant growth by secreting growth hormones.
Secrete fungistatic and antibiotic like substances
Solubilize and mobilize nutrients
Eco-friendly, non-pollutants and cost effective method