Watanabe, I. and Espinas , C.R. and Berja, N.S. and Alimagno, B.V.
The utilization of the Azolla - Anabaena complex as a nitrogen fertilizer for rice.
International Rice Research Institute, Manila, Philippines.
Because it contains nitrogen fixing blue-green algae Anabaefa azota in its fronds, AzoZla grows on a nitrogen-free solution, doubles its mass in 3 or 5 days, and accumulates 30 or 40 kg of N/ha in 2 weeks.
A calcium or phosphorus deficiency in the Azolla culture solution produces severe deterioration on growth. The optimum solution pH for Azolia is 5.5; a higher pH produces iron deficiency. Azolia is sensitive to a temperature higher than 310C (350 day which causes reddish-brown discoloration and reduces vigor...
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