INFLUENCE OF POTASH LEVELS ON GROWTH AND YIELD OF SWEET POTATO GERMPLASM

A field experiment was conducted to study the influence of potash levels on growth and yield of sweet potato germplasm at Horticulture farm, Sher-e-Bangla Agricultural University, Dhaka-1207, Bangladesh during October 2016 to April, 2017. Treatments consisted of seven different germplasm, viz., Local (L); Vietnam red (R); White (W); Yellow (Y); Orange (0); Violet (V); Magenta (M) and four levels of potassium: (K₀,120 kg ha^-1; K₁,140 kg ha^-1; K₂, 160 kg ha^-1 and K₃, 180kg ha^-1). Result revealed that vegetative performance was better in Magenta germplasm (M) than the rest of the germplasm, whereas Orange germplasm (O) showed the highest yield (47.2 t ha^-1) and was 16 % higher than local germplasm. For potassium application, K₃ treatment influenced to increase the yield (11%) over control treatment. Therefore, it can be concluded that the application of potassium had a positive effect on yield of sweet potato.