EFFECTS OF Mg, S, Zn, Mn AND B ON GROWTH, YIELD AND OIL CONTENT OF SUNFLOWER

Abstract

A field experiment was conducted at the research farm and Agro-Environmental Lab, Department of Agricultural Chemistry, Sher-e-Bangla Agricultural University, Dhaka-1207, Bangladesh, during the period from November 2021 to March 2022. The experiment comprised of eight treatments viz., T 1 =Urea @ 210 g/plot +TSP@ 84g/plot + MoP@ 98g/plot+Spraying 0.2% Borax @ 2g/L of water, T 2 = BARI recommended fertilizers + Borax 7.0 g/plot + ZnSO 4 ii

8.4 g/plot in soil, T 3 = BARI recommended fertilizers + Spraying 0.5% Borax + 0.5% ZnSO 4 5g/L of water , T 4 = BARI recommended fertilizers + MgSO 4 10 g/ Plot + Spraying MnO 2 @ 2g/L of water , T 5 = BARI recommended fertilizers + Spraying Bamper Vitamix @ 2g/L of water, T 6 =BARI recommended fertilizers+Spraying 0.2% Borax @ 2g/L of water+0.2% ZnSO 4 @ 2gm/L of water, T 7 = BARI recommended fertilizers + Spraying 0.2% ZnSO 4 @ 2g/L of water and T 8 = control (e.g.: no N, P, K, S, Mg, Zn, Mn and B). Data on different growth and yield parameter were recorded and statistically significant variation was found for different treatments of secondary and micronutrients. The results of this experiment showed that, the maximum plant height (180.67 cm), number of seed per head (645.5), number of leaves per plant (23.33), leaf area (65.33 cm), length of leaf (23.88 cm), leaf width (19.88 cm), weight of total seed per plot (2.51 kg), weight of seed per head (64.55 gm), weight of single seed (0.1 g), yield (1.7 t/ha), oil content (46.53 %) and protein content (22.25 %) was obtained wth T 5 treatment. While the minimum number of leaves (12.00), number of seed per head (375.9), plant height (146.73 cm), number of total head per plot (37), weight of total seed per plot (1.18 kg), yield (0.85 ton per ha), oil content (21.28 %), weight of seed per head (26.31 gm), weight of single seed (0.07 g) and protein content (13.97 %) were recorded from the control treatment. So, it can be concluded that a combination of BARI-recommended fertilizers + spraying Bamper Vitamix @ 2gm/ L of water is suitable for sunflower cultivation.