Rice performance and natural infection with blast (Pyricularia oryzae Cav.) under different algalization techniques and rates of fertilizer nitrogen |
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Authors: | Y. G. Yanni M. R. Sehly |
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Affiliation: | (1) Sakha Agricultural Research Station, Kafr El-Sheikh, A.R. Egypt |
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Abstract: | Japonica rice, Giza 171, was inoculated with either a dry or fresh soil-based inoculum of cyanobacteria containingAnabaena cylindrica, Anabaena oryzae, Nostoc muscorum andTolypothrix tenuis together with fertilization with urea at 0, 36, 72, or 108 kg N/ha. Fresh inoculum enhanced plant growth, yield and N content in comparison with the dry one. The efficiency of nitrogen utilization from the urea at all N concentrations was improved by using the fresh inoculum. Natural infection with leaf and neck blast caused byPyricularia oryzae Cav. increased with increasing N fertilization. Algalization with the fresh inoculum decreased leaf blast while neck blast was slightly higher in the algalized sub-plots but without considerable yield damage. |
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