Biofertilizers: their status and prospect in Ethiopia
1996
Asfaw Hailemariam (Ministry of Natural Resources Development and Environmental Protection, Addis Abeba (Ethiopia))
The rise in the cost of chemical fertilizer, the lack of fertilizer industries in developing countries and the growing environmental concerns have concentrated the attention of scientists world wide on biofertilizers, such as nitrogen fixers, phosphate solubilizers, cellulose and organic matter decomposers etc. to supply essential nutrient for crops. Inoculation of seeds or soils with nitrogen fixing and phosphate solubilizing microorganisms increases the microbial population in the rhizoshpere, consiquently affecting the plant growth. These beneficial effects have been exploited in the past in many developed and developing countries and microbial inoculants prepared from Rhizobium for leguminous crops, Azotobacter and Azospirillium for cereal crops and Frankia for tree crops have been used as nitrogen prociders. Whereas inoculants prepared from Bacillus, Pseudomonas, Aspergillus, and other phosphate dissolving microbs have been used as nitrogen providers. Whereas inoculants prepared from Bacillus, Pseudomonas, Aspergillus, and other phosphate dissolving microbs have been used for providing phosphorus organisms like Micorrhizae are used in improving utilization of available phosphorus. There is no inoculant industry in Ethiopia but there has been an enormous increase of interest in research in recent years in this area. This increase in interest and the limited usage of chemical fertilizer in the country gives the development of biofertilizers ample opportunities. The apparent easiness of the research area seems to have invited many researchers but for successful development of biofertilizers, a thorough understanding of the basic science is necessary.
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Эту запись предоставил Ethiopian Institute of Agricultural Research