EFFECT OF FERTILIZER, MANURE AND IRRIGATION ON THE NUTRIENT AVAILABILITY IN SOIL 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 2012 to July 2012 to study the effect of various organic manures and inorganic fertilizers with different water management on the growth and yield of Boro rice. BRRI dhan29 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 = Continuous flooding and I = Saturated Condition) 0 : Control, T 1 2 : 100% 120 P 25 K 60 S 20 Zn 2

: 50% NPKSZn + 5 ton cow-dung ha -1 , T 3 : 70% NPKSZn + 3 ton cow-dung ha -1 , T : 50% NPKSZn + 5 ton compost ha -1 , T 5 : 70% NPKSZn + 3 ton compost ha -1 , T 6 4 : 50% NPKSZn + 3.5 ton poultry manure ha -1 and T 7 : 70% NPKSZn + 2.1 ton poultry manure ha -1 , 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 but grain and straw yields were found in continuous flooded condition. The yield parameters and yields were significantly affected by fertilizer and manure. The highest grain yield 7

-1 -1

treatment. The higher grain yields were found by the application of organic plus inorganic fertilizers compared to the use of chemical fertilizer alone. The yield parameters were not significantly influenced by combined application of irrigation and fertilizer and the highest grain yields 1 T

1 1 T

-1 7

2 T

6

-1

7 0

-1

1

2 1 6rice grain and straw nutrient concentrations were significantly affected by the application of fertilizer and manure. The higher N, P, K & S concentrations and uptake were observed in the treatments where fertilizer plus manure were applied. The highest concentrations of grain N

treatment respectively and lowest from T 0

5 , T 3 , T 7 and T 2 0