EFFECT OF UREA SUPER GRANULE ON THE GROWTH AND YIELD OF POTATO

Abstract

A research work was carried out at the Research Farm, Sher-e-Bangla Agricultural University, Dhaka during the period from November 2016 to March 2017 in order to determine the suitable nitrogen source to observe the growth performance with a view to increasing the yield of potato. The experiment consisted of eight treatments. The experiment was laid out with Randomized Complete Block Design with three replications. Experimental results showed that nitrogen sources had significant effect on plant height, number of effective stem hill , wt. of tuber (g), yield of tubers (kg plot -1 ), yield of tubers t ha -1 , tuber fleshy dry matter content, specific gravity, grading of tubers (% by number). Potato production increased significantly due to the application of USG. The highest production was observed in T 3 treatment. The application of T 3 treatment showed the highest wt. of tuber hill -1 (57.53g), highest tuber yield kg per plot (25.77), highest tuber yield (29.45 t ha -1 ) than any other sources of nitrogen treatments. The mean apparent recovery of N by tested varieties (Diamont) was obtained with the application of USG in other treatment (except control) but the nitrogen use efficiency was highest in T 3 treatment. Findings revealed that application of USG showed the superiority over other sources of nitrogen to produce highest tuber yield of potato and for all cases lowest results were found in T 1 treatment receiving no fertilizer (control).