EVALUATION OF DRIP AND SURFACE IRRIGATION METHODS FOR ONION (Allium cepa L.) UNDER RAICHUR CONDITIONS
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Date
2011-06-30
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UNIVERSITY OF AGRICULTURAL SCIENCES, RAICHUR
Abstract
An investigation was undertaken to study the effect of drip and surface irrigation methods on Onion from September 2010 to December 2010 at New Orchard of Main Agricultural Research Station, UAS Raichur. The objective was to work out the water requirement of Onion and to compare the performance of growth parameter, yield, quality parameters, irrigation efficiencies and economics of drip and furrow irrigation (60, 80, 100 and 120 % ET)
The water saved in drip irrigation over furrow irrigation was found to be 65.73 % 55.18%, 44.64% and 34.10% for 60%, 80%, 100% and 120% ET respectively. The response of Onion to different drip irrigation levels in terms plant height, number of leaves and leaf width were significantly superior in respect of 80 per cent followed by 100 per cent ET level. The Onion under different irrigation treatments except 60 per cent ET level performed very well in terms of average bulb weight and bulb diameter. The highest bulb yield of 28.76 t/ha was obtained in 80 per cent ET level which was closely followed by 100 per cent ET level (26.72 t/ha).
The application and distribution efficiencies were found to be higher with drip irrigation treatments as compared to furrow irrigation. All the drip irrigation treatments recorded higher benefit: cost ratio (4.12 to 5.95). The furrow irrigation produced a benefit: cost ratio of 3.05. The general trend considering the different parameters tested suggests that 80 per cent ET level can be used to achieve higher yield of Onion in sand loam soils, under semi arid conditions.
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