Abstract
Green manuring with Azolla has been recommended for enhancing rice performance in the tropics and subtropics (Liu, 1979; Tuan and Thuyet, 1979). In addition to its capacity to contribute biologically fixed N, the Azolla canopy can inhibit growth of aquatic phototrophs and depress photodependent CO2 uptake. Consequently, floodwater pH will not increase during the day, and this reduces N loss by ammonia volatilization, which can be high in the summer season, especially when large amounts of fertilizer-N are applied to rice fields (Singh, 1977; Watanabe et al., 1977; Hamdi et al., 1980; Varghese, 1990).
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References
Hamdi Y A, Alaa El-Din M N, Shalan S N, Hassan M E 1980. Report on Methodology of Azolla Preservation and Transport. Ministry of Agriculture, Egypt, and Food and Agriculture Organization, Rome.
Liu C 1979. Use of Azolla in rice production in China. In: Nitrogen and Rice, pp. 375–394. IRRI, Los Banos, Philippines.
Singh P K 1977. Effects of Azolla on the yield of paddy with and without application of N-fertilizer. Current Science, 46, 642–644.
Tuan D T, Thuyet T R 1979. The use of Azolla in rice production in Vietnam. In: Nitrogen and Rice, pp. 395–504. IRRI, Los Banos, Philippines.
Varghese A 1990. Effect of organic manure on natural occurrence of Azolla pinnata and its effect on rice yield. International Rice Research Newsletter, 15, 16.
Watanabe I, Espinas C R, Berja N S, Alimango B V 1977. Utilization of the Azolla-Anabaena complex as a nitrogen fertilizer for rice. Research Paper Series No. 11. IRRI, Los Banos, Philippines.
Yanni Y G 1991. Potential of indigenous cyanobacteria to contribute to rice performance under different schedules of nitrogen application. World J. Microbiol. Biotechnol., 7, 48–52.
Yanni Y G, Hegazy M H 1990. Efficiency of algalization of rice in the Nile Delta with different amounts of nitrogen and potassium fertilization. World J. Microbiol. Biotechnol., 6, 395–399.
Yanni Y G, Sehly MR 1991. Rice performance and natural infection with blast (Pyricularia oryzae Cav.) under different algalization techniques and rates of fertilizer nitrogen. World J. Microbiol. Biotechnol., 7, 43–47.
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Yanni, Y.G. (1998). Optimizing zinc and phosphate statuses for enhancing field colonization and contribution of the symbiotic association Azolla—Anabaena to rice performance. In: Malik, K.A., Mirza, M.S., Ladha, J.K. (eds) Nitrogen Fixation with Non-Legumes. Developments in Plant and Soil Sciences, vol 79. Springer, Dordrecht. https://doi.org/10.1007/978-94-011-5232-7_18
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DOI: https://doi.org/10.1007/978-94-011-5232-7_18
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