EFFECT OF IRRIGATION, FERTILIZER AND MANURE ON THE GROWTH AND YIELD OF T. AMAN RICE

Abstract

The experiment was conducted in the farm of Sher-e-Bangla Agricultural University, Dhaka, Bangladesh during the period from July 2013 to November 2013 to study the effect of various organic manure and inorganic fertilizer with different water management on the growth and yield of T. Aman rice. BRRI dhan 32 was used as the test crop in this experiment. The experiment consists of 2 factors i.e. irrigation and fertilizer plus manure. Two levels of irrigations (I =Continuous flooding and I 2 1 =Saturated condition) were used with 8 levels of fertilizer & manure, as T : Control, T 1 : 100% N 120 P 25 K 60 S 20 Zn 2 (Recommended dose), T : 50% NPKSZn + 5 ton cowdung/ha, T 3 : 70% NPKSZn + 3 ton cowdung/ha, T 2 : 50% NPKSZn + 5 ton compost/ha, T 5 : 70% NPKSZn + 3 ton compost/ha, T 6 4 : 50% NPKSZn + 3.5 ton poultry manure/ha and T : 70% NPKSZn + 2.1 ton poultry manure/ha, with 16 treatment combinations and 3 replications. At the harvest, the yield parameters and yields were recorded; the irrigation had no significant single effect on the yield and yield parameters. The yield contributing characters and yield were significantly affected by fertilizer and manure and the highest effective tillers/hill (10.00), plant height (112.73 cm), panicle length (23.82 cm), no. of filled grains/panicle (94.20), 1000 grain wt. (21.90 g), grain yield (4.70 t/ha) and straw yield (6.58 t/ha) were found from T 7 (70% NPKSZn + 3 ton compost/ha), T 1 (100% Recommended Dose; N 120 P 25 5 K 60 S 20 Zn (100% Recommended Dose), T 1 (100% Recommended Dose), T (50% NPKSZn + 3.5 ton poultry manure/ha), T 4 (50% NPKSZn + 5 ton compost/ha) and T 6 (50% NPKSZn + 3.5 ton poultry manure/ha) treatments, respectively. The higher grain yield was found by the 6 application of organic plus inorganic fertilizers compared to the use of chemical fertilizer alone. The yields were influenced by combined application of irrigation and fertilizer and the highest grain yields (4.87 t/ha) was recorded from I 2 T (Saturated condition + 50% NPKSZn + 5 ton compost/ha) which was similar to the yield of I 4 1 T treatment combinations. The lowest grain yields (3.07 t/ha) was recorded from I 6 , I 1 (Continuous flooding + control) treatment combination. The higher concentrations of pore-water P & K were observed in the treatments where organic plus inorganic fertilizers were used combindly. The grain yield and nutrient concentrations were positively correlated with the pore-water P & K concentrations.