Effect of Fertilizers on the Yield and Nutrient Uptake by Transplanted Aman Rice (Binadhan-7) Grown in Two Soils of North-West Bangladesh

Abstract

Four field experiments were carried out with Binadhan 7 at Birgonj, Dinajpur; Debigonj, Panchagarh; Kaligonj, Lalmonirhat and Pirgonj, Rangpur during T.aman (kharif II) season of 2011 in the Old Himalalayan Piedmont Plain (AEZ 1) and Tista Meander Floodplain Soils of North-West Bangladesh. The experiments were designed with eight treatments and laid out in randomized complete block design (RCBD) with three replications. The treatment combinations were: T₁ (100%STB), T₂ (T₁ + 25% N), T₃ (T₁ + 25% NP), T₄ (T₁ + 25% NK), T₅ (T₁ + 25% PK), T₆ (T₁ + 25% NPK), T₇ (75% of T₁) and T₈ (Control). Results indicated that application of different fertilizers significantly affected the grain yield at all of the four locations. The highest grain yield was found in treatment T₆ (T₁ + 25% NPK). Statistically identical yield was observed in treatments T₃, T₄ and T₅ at Dinajpur; T₃ at Panchagar; T₂, T₃, and T₄ at Lalmonirhat and T₂ at Rangpur. All the treatment combinations gave significantly higher grain yield over the control at all of the locations. The highest straw yield was found in treatment T₆ (T₁ + 25% NPK). Statistically identical straw yield was found in T₃ and T₄ at Dinajpur; T₁, T₄ and T₅ at Panchagar; T₂, T₄, T₅ and T₇ Lalmonirhat and all treatments except T₇ and T₈ at Rangpur. Significantly the lowest yield was obtained in the control treatment (T₈) in all of the locations. The highest total N uptake was observed in treatment T₆ at all of the four locations. For total P uptake, the similar trend of total N uptake was observed for all the locations. Treatment T₆ showed the highest uptake of total K at all locations. The highest uptake of total S was observed in treatment T₆ at Dinajpur, Panchagarh and Lalmonirhat. But the highest uptake of total S was observed in treatment T₃ at Rangpur. However, the lowest total N, P, K and S uptake was observed in control treatment (T₈) at all locations. The partial budget analysis of T.aman rice demonstrated the highest net benefit of tkha-1 85,598/-, 78,619/-, 58,308/- and 72,532/- in T₆ treatment followed by tkha-1 76,348/- in T₄ treatment, 71,100/- in T₃ treatment, 54,192/- in T₃ treatment and 68,247/- in T₂ treatment where the highest MBCR of 5.40, 3.75, 2.20 and 3.84 was also observed in T₆ treatment at Dinajpur, Panchagarh, Lalmonirhat and Rangpur, respectively. Based on most profitable treatments, fertilizer doses of N₈₀P₈K₄₀S₈Zn₁ in Birgonj, Dinajpur; N₈₄P₈K₄₀S₆Zn₁ in Debigonj, Panchagarh; N₈₀P₈K₄₀S₆Zn₁ in Kaligonj, Lalmonirhat and N₈₁P₈K₃₅S₈Zn₁ in Pirgonj, Rangpur could be recommended for higher yield of Binadhan-7 rice in North-West Bangladesh.

DOI: http://dx.doi.org/10.3329/jesnr.v6i2.22106

J. Environ. Sci. & Natural Resources, 6(2): 115-120 2013