EFFECTS OF FREQUENCY OF IRRIGATION ON ONION (/Aiium capa L.) BULB PRODUCTION
Date
1992-06
Authors
Journal Title
Journal ISSN
Volume Title
Publisher
Bangladesh Agricultural University, Mymensingh.
Abstract
A field experiment was conducted at the Bangladesh
Agricultural University Horticulture Farm, Mymensingh during
Hovember 1989 to April 1890 to determine the optimum moisture
level and optimum frequency of irrigation for bulb production of
onion cv. Faridpur Bhati. There were five irrigation treatments
viz. no irrigation, irrigation at 15, 30, 45 and 60% depletion
of available soil moisture. The treatments were replicated three
times in randomized block design.
Irrigation significantly influenced the plant growth and
yield of onion. Maximum number of leaves per plant (11.58) was
j
produced in 15% depletion regime. Irrigation at 30% depletion
produced maximum plant height (43.03 cm) which was closely
followed at 15% depletion (41.83 cm). Occurence of split bulb and
bolting plant were higher under irrigated condition. The size of
the bulb increased with irrigation. Highest yield of bulb (12.96
t/ha) was obtained in 15% depletion regime with a total water use
of 195.2 mm.
Description
The onion {Allium cepa L.) is one of the nost important
crops among the vegetables and spices. It originated in an area
which includes Iran, Pakistan and the mountain region of the
north of these countries (Purseglove, 1972). It grows in both
tropical and temperate regions. The leading onion producing
countries of the world are China, India, USSR, USA, Japan,
Turkey, Spain, Brazil and Egypt (FAO, 1983).
Keywords
MATERIALS AND METHODS, DISCUSSION, Analysis of variance of different characters on onion