Explain why azzoa is grown in paddy field?
Answers
As well as its nitrogen biofertilization, Azolla provides a variety of benefits for rice production and grows in a way that is complementary to rice cultivation: The thick Azolla mat in rice fields suppresses weeds.Since Azolla floats at the water surface, it does compete with rice for light and space.
Answer:
Rice farmers keep Azolla pinnata in the rice field in their paddies because it generates valuable nitrogen via its symbiotic cyanobacteria.T his plant can be grown in wet soil and then plowed under, generating a good amount of nitrogen-rich fertilizer.Azolla pinnata is a free floating fresh water fern which multiplies rapidly, doubling every 5–7 days. The fern can coexist with rice plants because it does not interfere with their growth. A symbiotic blue green algae, Anabaena azollae resides in the leaf cavities of the fern. It fixes nitrogen. A part of the fixed nitrogen is excreted in the cavities and becomes available to the fern. The decaying fern plants release the same for utilisation of the rice plants. When field is dried at the time of harvesting, the fern functions as the green manure, decomposing and enriching the field for the next crop.
Explanation:
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