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About biofertilizers
In nature, there are a number of useful soil microorganisms which can help plants to absorb nutrients. Their utility can be enhanced with human intervention by selecting efficient organisms, culturing them and adding them to soils directly or through seeds. The cultured microorganisms packed in some carrier material for easy application in the field are called bio-fertilisers. Thus, the critical input in Biofertilizers is the microorganisms.
Benefits of biofertilizers
Bio-fertilisers are living microorganisms of bacterial, fungal and algal origin. Their mode of action differs and can be applied alone or in combination.
Types and features of biofertilizers
Based on type of microorganism, the bio-fertilizer can also be classified as follows:
Bio-fertilizer are mostly cultured and multiplied it the laboratory. However, blue green algae and azolla can be mass-multiplied in the field.
Characteristics Features of common Biofertilizers
List of commonly produced bio-fertilizers in India
Biofertilizers recommended for crops
Application of biofertilizers to crops
Seed treatment
Each packet (200g) of inoculant is mixed with 200 ml of rice gruel or jaggery solution. The seeds required for one hectre are mixed in the slurry so as to have uniform coating of the inoculants over the seeds and then shade dried for 30 minutes. The treated seeds should be used within 24 hous. One packet of inoculant is sufficient to treat to 10 kg seeds. Rhizobium, Azospirillum, Azotobacter and Phosphobacteria are applied as seed treatment.
Seedling root dip
This method is used for transplanted crops. Five packets (1.0 kg) of the inoculants are required for one ha and mixed with 40 litres of water. The root portion of the seedlings is dipped in the solutions for 5 to 10 minutes and then transplanted. Azospirillum is used for seedling root dip particularly for rice.
Soil treatment
4 kg each of the recommended biofertilizers are mixed in 200 kg of compost and kept overnight. This mixture is incorporated in the soil at the time of sowing or planting.
Use of VAM Biofertilizer
Use of Blue Green Algae (BGA)
Use of Azolla
Tips to get good response to biofertilizer application
Precautions to take while using biofertilizers
By: ASRAF UDDIN AHMED ProfileResourcesReport error
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