Effects of Potassium on Yield of Summer Rice (Oryza sativa)

The effects of potassium on growth and yield parameters of summer rice was assessed through an experiment at the agricultural farm of Uttar BangaKrishiViswavidyalaya, Pundibari, Coochbehar during the year 2018 and 2019. The important agronomic parameters were significantly influenced with potassium fertilization. Increasing doses of potassium enhanced economic produce of rice to the tune of 6.34 t ha-1 with 150% potassium fertilization (T5) which was statistically at par with T4, viz., 125% of the Recommended Dose (RD) of K and T8 (Nutrient Expert based potassium recommendation) treatment. The Straw yield (11.77 t ha-1) was also enhanced with increasing K levels @150% of the RD of potassium fertilization under same levels of nitrogen and phosphorus. It was concluded that, the current dose of potassium for rice has to be enhanced for desired yield and to keep balance of K+ in soil.