EFFECT OF NITROGEN AND SULPHUR ON THE GROWTH AND YIELD OF SUMMER ONION (Alliwn cepa L.)

Abstract

A field experiment was carried out to study the effect of Nitrogen and Sulphur on the growth and yield of summer onion at the Horticulture Farm of Sher-eBangla Agricultural University, Dhaka during the period from February to July 2007. The experiment was conducted with two factors; Factor A: Nitrogen (thur levels ) i.e. N o (0 kg N/ha), N 3 (60 kg N/ha), N 2 (120 kg N/ha) and N 3 (180 kg N/ha) kg N/ha and Factor B : Sulphur (four levels) i.e. S 0 (0 kg S/ha), S(10 kg S/ha), 52(20 kg S/ha) and S 3 (30 kg S/ha).The experiment was laid out in Randomized Complete Block Design (RCBD) with three replications. In case of Nitrogen, N 2 produced the highest diameter of bulb (3.86 cm). dry matter content of bulb (8.7 1%) and yield (17.58 tlha) and the lowest from N 0 1n case of Sulphur, 53 produced the highest diameter of bulb (3.99 cm), dry matter content (9.03%) and yield (16.05 t/ha) and the lowest from S 0 . For combined eft'ëct N 2S3 produced the highest diameter of bulb (4.95 cm). dry matter content of bulb (8.71%) and yield (19.10 tlha) and the lowest from N 0S0 . Considering above findings, the application of 120 kg N/ha with 30 kg S/ha is best for growth and yield of summer onion cultivation.