IJCRRI Journ Cur Res ReInternational Journal of Current Research and ReviewI Journ Cur Res Re2231-21960975-5241Radiance Research Academy1707General SciencesTHE EFFECTS OF DEFICIT IRRIGATION ON THE GROWTH AND YIELD OF ONION Owusu-SekyereJ. D.ManuSamuel A.31072012)1118This article is copyright of Popeye Publishing, 20092009This is an open-access article distributed under the terms of the Creative Commons Attribution (CC BY 4.0) Licence. You may share and adapt the material, but must give appropriate credit to the source, provide a link to the licence, and indicate if changes were made.

This study was conducted to determine the effects of deficit irrigation on the growth and yield of onion plants under a rain shelter. The completely randomized design was used with four treatment and three replications. The irrigation treatments imposed were application of 100% crop water requirement (ETc) __ampersandsignndash; T1, 80% ETc -T2, 60% ETc -T3and 40% ETc -T4. Growth parameters determined were bulb size and bulb weight. Uptake of nutrients, NPK, was also considered. The results showed that for both bulb size and weight, growth was in the order T2__ampersandsigngt;T1__ampersandsigngt;T3__ampersandsigngt;T4. No clear pattern was observed in terms of nutrient utilization. It can be concluded from this study that reduction in the daily water requirement by 20% for onion plant will lead to greater yield.

onion water levels deficit irrigation growth yield