RESPONSE OF BORO RICE TO FOLIAR SPRAY OF ZINC AND BORON

The field experiment was conducted at the Agronomy farm of Sher-e-Bangla Agricultural University, Sher-e-Bangla Nagar, Dhaka-1207 during the period from November 2016 to May, 2017 to response of boro rice for the foliar spray of zinc and boron. Treatment were T₁= Recommended Fertilizer (RF), T₂= RF+ Foliar spray (FS) with water at tiller initiation (TI), T₃= RF + Foliar spray (FS) with water at flowering initiation (FI), T₄= Zn (0.2%) FS at TI + RF, T₅=Zn (0.5%) FS at TI + RF, T₆=Zn (0.8%) FS at TI + RF, T₇= Zn (0.2%) FS at FI + RF, T₈=Zn (0.5%) FS at FI + RF, T₉= Zn (0.8%) FS at FI + RF, T₁₀= B (0.5%) FS at TI + RF, T₁₁= B (1.5%) FS at TI + RF, T₁₂= B (2.0%) FS at TI + RF, T₁₃= B (0.5%) FS at FI + RF, T₁₄= B (1.5%) FS at FI + RF, T₁₅= B (2.0%) FS at FI + RF. The experiment was laid out in a Randomized complete Block Design (RCBD) with three replications. Data on different growth, yield and yield contributing parameters were recorded. The highest plant height and LAI was obtained from T₁₁ where the lowest was found from T₁. The highest number of effective and tillers hill^-1 (15.13), panicle length (27.86) and filled grains panicle^-1 (155.52),  maximum days to panicle initiation, days to flowering and days to maturity (79.67, 117.67 and 152.67 days) was obtained from T₁₁ and the lowest was found from  T₁. The highest grain yield, straw yield, biological yield and harvest Index (7.10 t ha^-1, 7.61 t ha^-1, 14.71 t ha^-1 and 48.26) was obtained from  T₁₁.  T₁₁ (B (1.5%) FS at TI + RF) is the superior combination compared to other treatment combinations for rice production.