EFFECT OF ZINC AND COWDUNC ON GROWTH, YIELD AND NUTRIENT CONTENT OF TRANSPLANTED AMAN RICE (BRRI dhan33)

Abstract

The experiment was conducted at the Farm of Sher-e-Bangla Agricultural University, Dhaka. Bangladesh during the period from June to November 2012 to study the effect of zinc and cowdung on growth, yield and nutrient content of transplanted aman rice. BRRI dhan33 was used as the test crop in this experiment. The experiment consisted of two factors. Factor A: 4 levels of zinc (Zn0: 0 kg Zn hi' (control), Zn1: 2.0 kg Zn ha1, Zn2: 3.0 kg Zn ha4, Zn1: 4.0 kg Zn ha") and Factor B: 4 levels of cowdung (CO : 0 ton cowdung hit (control). C,: 4.5 ton cowdung C2: 5.0 ton cowdung ha4 and C1: 5.5 ton cowdung ha"). Recommended doses of N, P, K, and S were applied. The experiment was laid out in a randomized complete block design (RCBD) with three replications. For 4.0 kg Zn ha" (Zn3), the tallest plant (25.12, 41.09, 58.90, 75.03 and 88.34 cm) were recorded at 30. 50, 70. 90 days after transplanting (DAT) and harvest, respectively. On the other hand, the shortest plant (19.95, 33.52, 51.08, 65.25 and 80.50 cm) were found from control treatment (Zn0) at 30. 50, 70, 90 DAT and harvest, respectively. The maximum number of effective tillers hilr' (13.30) was observed from Zn3 and the minimum number (10.18) from Zn0. The highest grain yield ha" (5.11 ton) was found from Zn3 and the lowest grain yield ha" (3.28 ton) from Zn(). The highest Zn content in grain (0.0276%) was found from Zn3 and the lowest (0.0175%) from Zn0. In case of cowdung. at 30, 50, 70. 90 DAT and harvest, the tallest plant (25.29. 40.91. 58.20. 74.47 and 88.57 cm) were observed from C3 and the shortest plant (20.00, 34.07, 52.61. 66.13 and 79.65 cm) were observed from CO 3 respectively. The maximum number of effective tillers hill" (13.38) was observed from C3, while the minimum number (10.23) was found from Co . The highest grain yield (5.18 ton) was observed from C3. while the lowest grain yield ha" (3.29 ton) was observed from Co. The highest Zn content in grain (0.0259%) was observed from C3, again the lowest (0.0204%) was observed from Co. Due to the interaction effect of different levels of zinc and cowdung, at 30. 50. 70,90 DAT and harvest, the tallest plant (27.27, 43.50, 61.00, 78.70 and 92.11 cm) was observed from Zn3C3. while the shortest (16.23. 28.13. 46.97, 57.67 and 70.43 cm) was recorded from Zn0C0. The maximum number of effective tillers hilF' (14.60) was recorded from Zn3C3, whereas the minimum number (8.93) was found from Zn0C0. The highest grain yield hi' (6.13 ton) was attained from Zn2C2. whereas the lowest grain yield ha' (2.14 ton) from Zn0C0 The highest Zn content in grain (0.0295%) was observed from Zn3C3 and the lowest (0.0126%) from Zn0C0.