GROWTH
AND YIELD OF ONION AS AFFECTED BY NITROGEN AND MULCHING
M. A. Rahman, J. A. Mahmud* and M. M. Islam*
*Corresponding Author’s Email: mahbubislam_sau@yahoo.com,
jamahmud_bd@yahoo.com
Abstract
A
field experiment was conducted at the Sher-e-Bangla Agricultural University
Farm, Dhaka, Bangladesh during the rabi season from October 2010 to April 2011
to evaluate the combined use of
nitrogen (N) and mulching (M) on the growth and yield of onion (Allium cepa) cv. Taherpuri. The
experiment was carried out with the application of four levels of nitrogen viz: 0 (N0); 60 (N60);
120 (N120) and 180 (N180) kgha-1 and three types of mulching such as no mulch
or control (M0), rice straw (Ms) and water hyacinth (Mw)
with the following 12 treatment combinations N0M0,
N0Ms, N0Mw,
N60M0, N60Ms, N60Mw, N120M0, N120Ms, N120Mw, N18oM0, N180Ms, N180Mw. This was laid out in randomized complete
block design (RCBD) with three replications. The results revealed that the maximum plant
height and number of leaves per plant were found in N180Mw and
N120Mw treatment combination whereas minimum plant height
and number of leaves were found in control. The yield components and yield such as bulb diameter,
individual bulb fresh weight and bulb yield were also significantly influenced by
the combination of N and M. The highest bulb diameter and individual bulb fresh
weight were obtained from N120Mw treatment and minimum
values were observed in N0M0, control condition.
The treatment combination N120Mw was found the best bulb
yield (12.20 tha-1) provider whereas control (N0M0)
showed the lowest yield (5.99 tha-1). Treatment
N120Mw gave 103% higher bulb
yield compared to control (N0M0).
Key words: Onion, Nitrogen, Mulching, Growth, and Yield
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Return Volume: Journal of Experimental Biosciences 5(1): January 2014
