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प्रश्न
Microbes can be used to decrease the use of chemical fertilisers and pesticides. Explain how this can be accomplished.
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उत्तर
Microbes can help decrease the use of chemical fertilizers and pesticides through several mechanisms, primarily by acting as biofertilizers and biopesticides:
- Biofertilizers: Certain microbes fix atmospheric nitrogen, solubilize phosphorus, and decompose organic matter to release nutrients in forms more accessible to plants. By enriching the soil naturally, these microbes reduce the need for chemical fertilizers. For example, nitrogen-fixing bacteria (like Rhizobium in legume roots) supply nitrogen directly to the plants, lessening the requirement for nitrogenous chemical fertilizers.
- Biopesticides: Some microbes produce substances that control or inhibit pests and pathogens. Using these microbial agents helps control harmful insects, fungi, and bacteria without resorting to chemical pesticides. This biocontrol method is safer for the environment and beneficial organisms. Organic matter decomposition and composting by microbes improve soil health and fertility, which in turn reduces dependence on chemical inputs.
Thus, by leveraging beneficial microbes as biofertilizers and biopesticides, agriculture can minimize the use of chemical fertilizers and pesticides, leading to eco-friendly and sustainable farming practices.
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संबंधित प्रश्न
What are 'biofertilizers'? Explain them with suitable examples.
What is a heterocyst?
Give the meaning of the Nif gene.
Name the aquatic fern commonly used in paddy fields as a biofertilizer.
How does the application of cyanobacteria help improve agricultural output?
Your advice is sought to improve the nitrogen content of the soil to be used for cultivation of a non-leguminous terrestrial crop.
- Recommend two microbes that can enrich the soil with nitrogen.
- Why do leguminous crops not require such enrichment of the soil?
Explain the interrelationship between organic farming and biofertilizers, with the help of any three suitable examples.
How does the activity of each one of the following help in organic farming?
Cyanobacteria
Name any two bacterial biofertilizers.
______ are nitrogen fixing micro-organisms.
identify the plants with which Anabaena, is associated.
Identify the CORRECT statement regarding Mycorrhiza.
From the following pairs of microbes, identify the pair that has both the microbes that can be used as Biofertilizers.
Mycorrhiza is a______ which forms a symbiotic association with the underground parts like rhizomes and root of higher plants.
Anabaena forms symbiotic relationship coralloid roots of ______.
Mycorrhiza forms symbiotic association with ____________ of higher plants.
VAM is a type of ______
Soil microorganisms mainly comprise:
Which one of the following is NOT a nitrogen-fixing organism?
Biofertilizers are
Give two examples of biofertilizer.
Match the pairs:
| Column A | Column B | ||
| (i) | Compost making biofertilizer |
(a) | Azotobacter |
| (ii) | N2 fixing biofertilizer | (b) | Mycorrhiza |
| (iii) | Fungal biofertilizer | (c) | Agrobacterium |
| (iv) | Phosphate solubilizing biofertilizer |
(d) | Actinobocteria |
Azolla is used as biofertiliser because it ______.
- Give an example of a genus of fungi that forms mycorhizal association with plants.
- How does the plant derive benefits from this association?
How many statements are true about biofertilizers?
- They are nitrogen fixers.
- They are commercial preparation of live bacteria and fungi.
- Use of biofertilizers is expensive.
- There is only one type of biofertilizer.
- They are classified as inorganic.
