title: Rice performance and natural infection with blast (Pyricularia oryzae Cav.) under different algalization techniques and rates of fertilizer nitrogen.
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.
authors.affiliation: Sakha Agricultural Research Station, Kafr El-Sheikh, A.R. Egypt.
authors.forename: Y G
authors.initials: YG
authors.lastname: Yanni
authors.forename: M R
authors.initials: MR
authors.lastname: Sehly