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Effect of Irrigation on the Growth and Yield of Onion in the Hill Valley

M. Moniruzzaman
Scientific Officer
HTARS, Khagrachari

M.Karim
Scientific Officer
HTARS, Khagrachari

C.K. Das
Scientific Officer
HTARS, Khagrachari

S.A. Mallik
Director
Spices Research Center, BARI, Shibganj, Bogra

Abstract/ Executive Summary:

A field experiment was carried out during November 2007 to March 2008 at Hill Agricultural Research Station (HARS), Khagrachari to determine the effect of irrigation on the growth and yield of onion in hill valley. Five irrigation treatments viz., no irrigation (I₀), irrigation at IW: CPE 0.6(I₁), irrigation at IW: CPE 0.8(I₂), irrigation at IW: CPE 1.0 (I₃) and irrigation at IW: CPE 1.20(I₄) were used. Frequent irrigation at IW: CPE 1.20 produced the maximum yield (12.72 t/ha). The treatment received 5 irrigation with total irrigation water of 20 cm.

Keywords: Growth, Hill valley, Irrigation, Onion, Yield

Location: HTARS, Khagrachari

Start Date: 00-11-2007

End Date: 00-03-2008

Program Area: Crop-Soil-Water Management

Commodity: Onion

Objectives:

To determine the appropriate irrigation schedule for onion cultivation in the hill valley.

Methodology:

An experiment was conducted at Hill Agricultural Research Station (HARS), Khagrachari to study the performance of onion under different moisture regimes during November 2007 to March 2008. Different moisture regimes were created by different irrigation schedule based on IW: CPE ratio. Five (5) irrigation schedule viz., I0 - no irrigation, I₁- irrigation at IW: CPE 0.6, I₂- irrigation at IW: CPE 0.8, I₃- irrigation at IW: CPE 1.0 and I₄- irrigation at IW: CPE 1.20 were used in this study. The amount of fixed irrigation water (IW) was 4 cm. Pan evaporation data were recorded daily and cumulative figures were calculated subtracting the rainfall. When the ratio between irrigation water (IW) and cumulative pan evaporation (CPE) attained the ratio prefixed for a particular treatment, it was considered as the time of its irrigation. CPE was calculated as follows: Irrigation use efficiency of onion was calculated using the following formula for evaluating the contribution of unit amount of water to crop yield. Irrigation water use efficiency (kg / ha / cm) = Yield in irrigated plot- yield in control(kg / ha)/Irrigation water used (cm) BARI onion 1 was used as a test variety. The experiment was laid out in RCB design with three replications. The unit plot size was 2x1.5 m² with spacing with 20 x 10 cm. The land was fertilized with Urea, TSP, MP and cow dung @ 270, 210,170, 10000 kg /ha, respectively. 30 days aged onion seedlings were transplanted in the field plots on 20 Nov.2007. Intercultural operations were done as and when necessary. The crop was harvested after the bulb maturity. Data on different yield and yield attributes were recorded and analyzed statistically. .

Source of Information: Research Report 2008. Spices Research Center, BARI, Shibganj, Bogra.

Article Link (Online Journal):

Funding Source:

1. Government

Budget: 9,000/--

Total Budget (Tk.) : 9,000/--

Achievement/Findings:

Different irrigation schedule had significant influence on the yield and yield attributes of onion. Irrigation at IW: CPE 1.20 (i.e. 5 irrigation) produced significantly the highest plant height (54.13 cm), no. of leaves/plant (8.92), leaf length (45.28 cm), bulb diameter (4.67) and yield (12.72 t/ha) followed by performance of irrigation at IW: CPE 1.0 (8.91 t/ha). The treatment that produced the highest yield required 5 irrigation at 21,43,57,71 and 82 days after transplanting (DAT) with total irrigation water of 20 cm and irrigation water efficiency of 397 kg/ha/cm. However, the lowest yield (4.13 t/ha) was obtained from no irrigation treatment.In the hill valley onion may require 5 irrigation at an interval of 12-14 days for better growth and yield.

Knowledge Management: Journal, Report/Proceedings