EFFECT OF INORGANIC AND IMPROVED COMPOST FERTILIZER ON YIELD ATTRIBUTES AND YIELD OF SWEET POTATO

Abstract

A field experiment was conducted to study the effect of inorganic and improved compost fertilizer on yield attributes and yield of sweet potato. The experiment was held in the research field of department of Agricultural Botany, Sher-e-Bangla Agricultural University, Dhaka-1207, Bangladesh, during the period from November 2018 to March 2019. In the experiment the treatment consisted of seven levels of fertilizer doses viz. T o = No fertilizer (control), T 1 = 100% Recommended dose of BARI, T 2 = Improved compost fertilizer 2kg/m 2 , T 3 = 50% rec. dose of BARI+1 kg improved compost fertilizer/m 2 , T 4 = 50% rec. dose of BARI+2 kg improved compost fertilizer/m = 100% rec. dose of BARI+1 kg improved compost fertilizer/m 2 , T 6 = 100% rec. dose of BARI+ 2kg improved compost fertilizer/m 2 and the variety here in this experiment was BARI Sweet Potato – 12. The one factor experiment was laid out in Randomized Complete Block Design (RCBD) with these seven levels of fertilizer doses. Three replications were maintained in this experiment. The experiment revealed that T 5

treatment (100% rec. dose of BARI+1 kg improved compost fertilizer/m ) showed better results in most of the cases and it also showed the highest yield (43.604 ton/ha) of sweet potato variety than the other treatments. On the other hand, T 0 2 treatment (T 0 = No fertilizer) showed the lowest growth and yield (14.465 ton/ha) here in this experiment. So, it can be concluded that 100% recommended BARI dose+ 1kg improved compost fertilizer/m 2 (T 5 ) is the best treatment to apply for obtaining better growth and yield from BARI Sweet Potato-12 plant. Hence, it is suggested that these remunerative treatment of inorganic and compost fertilizer’s doses help in successful crop production of sweet potato. 2 , T 5