Abstract
The effect of nitrogenous sources like ammonium sulphate (AS), prilled urea (U), urea super granule (USG) and farm yard manure (FYM) was studied on the fresh biomass (FB) and acetylene reduction activity (ARA) ofAzolla pinnata, R. Brown (Bangkok isolate), grown as a dual crop with rice, and rice yield in three successive seasons. Irrespective of the N-sources and seasons, the FB and ARA of Azolla were observed to be maximum on 14th day after Azolla inoculation (DAI). The different N-sources had significant effect on the ARA and to a lesser extent on the FB of Azolla. The treatment without fertilizer-N (control) exhibited highest ARA, FB and total N-content of Azolla. These were inhibited to a lesser extent by USG and FYM, though used at higher rates of 75 kg N ha−1 and 90 kgN ha−1 respectively, compared to that by AS and U, used at lower rates of 45kg N ha−1 each.
This is a preview of subscription content, log in via an institution to check access.
Similar content being viewed by others
References
Craswell E T and Vlek P L G 1980 Research to reduce losses of fertilizer nitrogen from wetland rice soils.In FAI Annual Seminar ‘Fertilizers in India in the Eighties’, New Delhi, India.
De Datta S K 1981 Principles and Practices of Rice Production. pp 375–396. John Wiley and Sons, USA.
Ito O and Watanabe I 1983 The relationship between combined nitrogen-uptake and nitrogen fixation in Azolla-Anabaena symbiosis. New Phytol. 95, 647–654.
Jackson M L 1968In Soil Chemical Analysis. pp 183–205. Prentice Hall of India Pvt. Ltd., New Delhi.
Le Van K and Sobochkin A A 1963 The problems of utilization of Azolla as a green manure in the Democratic Republic of Vietnam. Timuyazev Moscow Agric. Acad. 94, 93–97.
Li Shi-ye 1984 Azolla in the paddy fields of Eastern China.In Organic Matter and Rice. pp 169–178. IRRI, Los Banos, Philippines.
Mikkelsen D S and De Datta S K 1979 Ammonia volatilization from wetland rice soils.In Nitrogen and Rice, pp 135–156. RRL. Los Banos, Philippines.
Peters G A, Ito O, Tyagi V V S and Kaplan D 1981In Genetic Engineering of Symbiotic Nitrogen Fixation and Conservation of Fixed Nitrogen. Eds J M Lyonset al., pp 343–362. Plenum Press, New York.
Satapathy K B and Singh P K 1985 Growth and N2-fixation of Azolla-Anabaena symbiosis in the presence of fertilizer nitrogen.In Proc. of the DAE Symp. on Newer Approaches to Biological Application. M S Univ. of Baroda, India. pp 270–276.
Schollhorn R and Burris R H 1967 Acetylene as a competitive inhibitor of N2-fixation. Proc. Natl. Acad. Sci. USA. 58, 213–216.
Singh P K 1977a Multiplication and utilization of fern Azolla containing nitrogen fixing algal symbiont as green manure in rice cultivation. RISO 26, 125–136.
Singh P K 1977b Effect of Azolla on the yield of paddy with and without application of nitrogen fertilizer. Curr. Sci. 46, 642–644.
Singh P K 1979 Use of Azolla in rice production in India.In Nitrogen and rice. pp 407–418 IRRI, Los Banos, Philippines.
Watanabe I 1982 Azolla-Anabaena symbiosis—its physiology and use in tropical agriculture.In Microbiology of Tropical Soils and Plant Productivity. Eds. Y Dommergues and H G Diem pp 169–185. Martinus Nijhoff Publishers, Dordrecht.
Watanabe I, Espinas C R, Berja N S and Alimagno B V 1977 Utilization of Azolla-Anabaena complex as a nitrogen fertilizer for rice. IRPS No. 11, 1–15.
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
Manna, A.B., Singh, P.K. Effect of different nitrogen sources on growth, acetylene reduction activity ofAzolla pinnata and yield of rice. Plant Soil 107, 165–171 (1988). https://doi.org/10.1007/BF02370543
Received:
Revised:
Issue Date:
DOI: https://doi.org/10.1007/BF02370543