Effect of Fertilizers on Yield and Nutrient Uptake by Binadhan-7 Rice Grown in old Brahmaputra Floodplain Soils

Abstract

The economic rate of nutrients was determined with eight different fertilizer treatment applied on T. aman rice (var. Binadhan-7) in Old Brahmaputra Floodplain Soils (AEZ-9) during 2012 and 2013 at Trisal, Mymensingh. The experiment was laid out in a randomized complete block design (RCBD) with three replications. The treatment combinations were: T₁ (N₆₄ P₁₄ K₂₈ S₆ Zn₁), T₂ (N₈₀ P₁₄ K₂₈ S₆ Zn₁), T₃ (N₈₀ P_17.5 K₂₈ S₆ Zn₁), T₄ (N₈₀ P₁₄ K₃₅ S₆ Zn₁), T₅ (N₆₄ P_17.5 K₃₅ S₆ Zn₁), T₆ (N₈₀ P_17.5 K₃₅ S₆ Zn₁), T₇ (N₄₈ P_10.5 K₂₁ S_4.5 Zn_0.75), and T₈ (control). Grain and straw yields were significantly affected by the application of fertilizers at different rates. Results revealed that the average highest grain (4.86 t ha^-1) was recorded in T₆ (N₈₀ P_17.5 K₃₅ S₆ Zn₁) treatment and straw yield (5.34 t ha^-1) was recorded in treatment T₃ (N₈₀ P_17.5 K₂₈ S₆ Zn₁) which is 132.54% and 86.06% respectively higher over control treatment. The second highest grain yield (4.77 t ha^-1) was obtained in T₃ treatment and straw (5.18 t ha^-1) was recorded in T₆ treatment. Average (2012 & 2013) nutrient uptake (grain and straw) was the highest in T₃ treatment. Partial budget analysis demonstrated the highest net benefit of Tk. 69,673 ha^-1 in T₆ followed by Tk. 68,833 ha^-1 in T₃ and the highest MBCR (4.29) was obtained in T₃ treatment. The present investigation suggests that treatment T₃ (N₈₀ P₁₈ K₂₈ S₆ Zn₁) might be the best profitable fertilizers dose to sustain Binadhan-7 rice production in Old Brahmaputra Floodplain Soils.

DOI: http://dx.doi.org/10.3329/jesnr.v6i2.22096

J. Environ. Sci. & Natural Resources, 6(2): 55-59 2013