Year: 2022 | Month: June | Volume 15 | Issue 2
Effect of Drip Irrigation Frequency and Lateral Spacing on Kharif Onion Crop
Mukesh Kumar Mehla
R.K. Jhorar
Sanjay Kumar
Ashish Kumar
DOI:10.30954/0974-1712.02.2022.7
Abstract:
Irrigating crops based on evapotranspiration deficit and irrigating after a particular time interval provide scope for optimizing irrigation. Studying the effect of different irrigation frequency on water productivity, is important to develop irrigation schedules under micro irrigation. In this study, effect of different spacing between drip lateral (45 cm and 60 cm) and irrigation frequency (One, Two, Three and Four days) on onion crop (Allium cepa L.) under drip irrigation system during kharif season 2018 in micro plots (2 m × 2 m) filled with sandy loam soil was evaluated. Irrigation was applied using drip irrigation for different irrigation frequency using same volume. During the experiment different observations like soil physical and chemical properties, different growth and yield parameter were recorded. Highest water productivity (10.1 kg/m3) and total bulb yield (169.4 q/ha) was observed in two days irrigation frequency with 45 cm lateral spacing. Available moisture depth (cm) in the root zone (0-60 cm) at 90 DAT, for one day irrigation interval with 45 cm lateral spacing was 11.6 cm at the middle of two laterals which was 9.4 % higher than with 60 cm lateral spacing where available moisture was 10.6 cm. More distantly placed laterals may show poor water distribution and with a few of plants at the midpoint between the rows being water stressed. Studying the effect of different irrigation frequency and design parameter like lateral spacing hence becomes important to develop irrigation schedules and practices that can be used for better irrigation water management.
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Highlights
- Agrifound Dark Red variety of onion (Allium cepa L.) under sandy loam soil was grown under different treatment consisting of drip lateral spacing (45 cm and 60 cm) and irrigation frequency (One, Two, Three and Four days).
- Periodical observation of plant growth and yield parameters were taken. Under the given conditions for Sandy loam soil, two days irrigation frequency with 45 cm lateral spacing treatment came out to be the most preferable treatment on the basis of water productivity and yield of onion crop.
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