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Field experiments were carried out during the 2011/2012 cropping seasons in the flood plain soil of the Teaching and Research Farms of the Delta State University, Asaba Campus, Asaba. The aim was to evaluate the effects of organomineral fertilizer on the yield and yield components of rice. The treatments were four levels of organomineral fertilizer (poultry manure fortified with ammonium nitrate) and a control at the rates of 0, 2.5, 5.0, 7.0 and l0 tha. The experiment was laid out in a randomized complete block design replicated three times. Data were collected at the 4 , 8 , 12 and 16th weeks after planting (WAP) on plant height, total leaf area, number of tillers, straw and grain yield, 1000 grain weight and harvest index. Data collected were subjected to analysis of variance and significant differences separated using student-Newman-Keals test. The results showed that 10 tha treatment application gave the highest values in plant height (75.45cm), leaf area (374.24), straw and grain yield 534.20 and 625.03 kgha and 1000 grain weight 42.7 g/ha. There was a Synergistic affects of organomineral fertilizer in all growth and yield parameters evaluated.

iosr journal of agriculture and veterinary science

Effects of Different Levels of Organomineral Fertilizer on the Yield and Yield Components of Rice (Oryza Sativa L.) In A Coastal Flood Plain Soil, Nigeria.