EFFECT OF VARIOUS ORGANIC MANURE AND INORGANIC FERTILIZER WITH DIFFERENT WATER MANAGEMENT ON THE GROWTH AND YIELD OF BORO RICE

Abstract

The experiment was conducted in the farm of Sher-e-Bangla Agricultural University, Dhaka, Bangladesh during the period from December 2010 to April 2011 to study the effect of various organic manure and inorganic fertilizer with different water management on the growth and yield of boro rice (BRRI dhan29). The experiment consists of 2 factors i. e. irrigation and fertilizer plus manure. Two levels of irrigations (i= Alternate wetting and drying and 11= Continuous flooding) with 8 levels of fertilizer plus manure, as TO: Control, T1 : 100% N 0gP,5K45S20Zn2 (Recommended dose), T 2: 50% NPKSZn + 5 ton cowdung/ha, 13 : 70% NPKSZn + 3 ton cowdung/ha, T 4: 50% NPKSZn ± 4 ton poultry manure/ha. T 5: 70% NPKSZn + 2.4 ton poultry manure/ha, 1'6: 50% NPKSZn 1- 5 ton composllha and T 7 : 70% NPKSZn + 3 ton compostihs were used in the experiment. There were 16 treatment combinations and 3 replications. Results revealed that irrigation had no significant effect on the yield and yield parameters but a little bit higher yields were obtained from continuous flooding (J). The Yield contributing characters and yields were significantly affected by fertilizer and manure application. The highest effective tillers/hill (13.3), plant height (88.56 cm), panicle length (21.07 cm), 1000 grain wt. (23 g), grain yield (6.96 tiha) and straw yield (6.03 Uha) were found from T 4 (50% NPKSZn + 4 ton poultry manurc/ha) treatment and the lowest in To treatment. The highest grain and straw yields were found by the application of organic manure plus inorganic fertilizers compared to the use of chemical fertilizer alone. Significantly the highest grain (7.13 tlha) and straw yields (6.27 tlha) were recorded from 1 1T4 (Continuous flooding + 50% NPKSZn + 4 ton poultry manurelha) and the lowest (3.84 t/ha) from loTo (Alternate wetting and drying + control) treatment combination and 85% grain yield increased over control. Irrigation did not significantly influence the grain and straw nutrient concentration and uptake while the higher NPKS uptake was recorded in continuous flooding. The boro rice grain and straw nutrient concentrations in grain and straw of boro rice were significantly affected by the application of fertilizer and manure and application of fertilizer plus manure resulted in higher nutrient use efficiency along with higher N, P. K and S uptake by boro rice. The highest concentrations of grain N (0.997%). p (0.292%), K (0.361%), S (0.130%) and straw NPKS were recorded from T treatment and lowest from To treatment. Similarly, nutrient uptake by rice grain and straw was also higher in T 4 treatment compared to other fertilizer treatment. The highest nutrient concentrations and uptake were recorded in 1 1T4 treatment combination. The levels of organic matter and nutrient concentration were increased in the post harvest soils where manure plus inorganic fertilizer were used.