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Irrigation Scheduling of Sugarcane with Onion as Intercrop

M.A.B. Siddiquee
Bangladesh Sugarcane Research Institute, Ishurdi, Pabna, Bangladesh.

S. M. I. Hossain
Bangladesh Sugarcane Research Institute, Ishurdi, Pabna, Bangladesh.

M. A. Hossain
Bangladesh Sugarcane Research Institute, Ishurdi, Pabna, Bangladesh.

Abstract/ Executive Summary:

An experiment was conducted in Bangladesh Sugarcane Research Institute (BSRI) farm at Ishurdi during 1994-95 and 1995-96 cropping seasons to develop an irrigation schedule for sugarcane with onion as intercrop using pan ratio (PR) method. Irrigation was applied during premonsoon only. No irrigation was applied during monsoon or post monsoon. The highest yield of sugarcane as well as onion were obtained during both 1994-95 and 1995-96 cropping when irrigation was applied at PR = 1.0. With this PR, the highest yield of sugarcane (102.95 t ha^-1) was obtained with 360 mm irrigation water in addition to 75 mm of effective rainfall during 1994-95. The highest yield of onion (4.461 t ha^-1) was obtained with 220 mm of irrigation water in addition to 61 mm effective rainfall in the same year.

Keywords: Irrigation schedule, Sugarcane, Onion, Intercrop, Pan ratio.

Location: BSRI farm, Ishurdi.

Start Date: 00-00-1994

End Date: 00-00-1996

Program Area: Farming System

Commodity: Irrigation scheduling

Objectives:

To sandy loamy soil is better for sugarcane cultivation.
To develop an irrigation schedule for sugarcane with onion as intercrop.

Methodology:

The experiment was conducted at BSRI farm, Ishurdi, during 1994-95 and 1995-96 cropping seasons. Sugarcane variety Isd 16 and onion variety Faridpur (local) were used as planting material. Sugarcane was planted following STP method, while two rows of onion seedlings were transplanted in between 90 cm spaced sugarcane rows. The experiment was set in a randomized complete block design with three replications. The treatments of the experiment were as follows: I_B = Only two base irrigation at 1 and 15-20 d after plantation (DAP), I₁ = IB + Irrigation at PR = 0.6 followed by PR = 0.4 three months before harvest of sugarcane. 1₂ = IB + Irrigation at PR = 0.9 followed by PR = 0.6 three months before harvest of sugarcane. 1₃ = IB + Irrigation at PR = 1.0 followed by PR = 0.6 three months before harvest of sugarcane. Where pan ratio (PR) is the ratio of irrigation water (IW) applied plus effective rainfall (ER) to the cumulative open pan evaporation (CPE) from USWB class A open pan (i.e. PR = (IW+ER)CPE). Irrigation water (IW) was calculated considering 40 cm effective root depth at the start and 100 cm during tillering stage and assuming 50% depletion of available soil moisture allowable. Irrigation interval was determined using following: CPE = (IW+ER/PR). In each irrigation a prefixed amount of irrigation water was applied. No irrigation was needed during and after monsoon.

Source of Information: Bangladesh Journal of Sugarcane, Vol: 23, pp: 36-39, July, 2001, ISSN 1991-8925

Article Link (Online Journal):

Funding Source:

1.

Budget:

Total Budget (Tk.) :

Achievement/Findings:

It may be concluded that irrigation to sugarcane with onion as intercrop should be given at pan ratio (PR) =1 during intercrop period. After harvesting onion, irrigation to sugarcane alone can be scheduled at either PR-1 or PR=0.9 for maximizing the yield of sugarcane.

Knowledge Management: Journal