EFFECT OF FERTILIZER AND MANURE ON NUTRIENT AVAILABILITY AND YIELD OF BORO RICE IN DIFFERENT SOILS

Abstract

The experiment was conducted in the net house of Soil Science Department at Sher-e-Bangla Agricultural University, Dhaka, Bangladesh during the period from October 2012 to May 2013 to study the effect of fertilizer and manure application on yield and yield components of rice and availability of nutrients in soil pore water during rice growing period. The experiment consists of 2 factors i.e. soils and fertilizer plus manure. Two soils (S 1 = SAU Soil and S = Shingair Soil) and 5 levels of fertilizer and manure (T 0 : Control, T 1 : 100% N

(Recommended dose), T 2 : 50% NPKS + 5 ton cowdung ha -1 , T : 50% NPKS + 5 ton compost ha -1 , T 4 : 50% NPKS + 3.5 ton poultry manure ha -1 3 ) were used for Boro rice (BRRI dhan29) cultivation in the earthen pots. There were 10 treatment combinations and 3 replications. Results revealed that variation of soils, fertilizer and manure application and their combination had significant effect on the yield and yield parameters. SAU soil showed better performance than Shingair soil. The highest plant height (79.43 cm), panicle length (25.95 cm), number of filled grain/panicle (166.65) and 1000 grain wt. (23.76 g) were obtained from T

and higher grain yield (94.22 g/pot) and straw yield (85.2 g/pot) were obtained from T treatment and the lowest from T 0 treatment. The S 1 T 4 1 treatment combination showed higher yield and yield contributing characters and the lowest was obtained from S 1 T 0 and S treatment combinations. Pore water samples were collected at 20, 40 and 60 days after transplantation and analyzed for N, P, K and S content following standard methods. The N and P concentration in the pore water varied significantly with different soils, fertilizer plus manure and their combinations treatments and time. K and S concentration in pore water varied significantly with fertilizer plus manure treatments. The higher pore water N concentrations were found in SAU soil compared to Shingair soil. Higher pore water P and K concentrations were found in Shingair soil compared to SAU soil. Among the fertilizer treatments, significantly higher

120 2 P 4 T 25 0 K 60 S 20 2 Zn 2 concentrations of N, P, K and S were found in the T treatment compared to other fertilizer treatments. The grain and straw nutrient concentrations were significantly affected by the application of fertilizer and manure. The highest concentrations of grain N (1.290 %) from T 4 , P (0.310 %) from T 1 , K (0.274 %) from T 4 and S (0.094 %) was obtained from T treatment and the lowest from T treatment. The similar and higher concentrations of straw N, P, K, and S were found in all fertilizer treatments except control. The soil and fertilizer treatment combinations did not significantly affect the grain and straw nutrient concentrations. 0

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