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2008, vol. 45, iss. 2, pp. 195-202
Yield and evapotranspiration of onion depending on different pre-irrigation soil moisture
Institute of Field and Vegetable Crops, Novi Sad
Projekat Ministarstva nauke Republike Srbije, br. TR6892

Keywords: onion; bulb yield; evapotranspiration; preirrigation soil moisture
The experiment with effects of different pre-irrigation soil moisture on onion bulb yield and evapotranspiration (ET), produced by seeding, was established at field conditions at the Rimski Šančevi Experiment Field of Institute of Field and Vegetable Crops in Novi Sad. The experiment was conducted in 2005/2007 under sprinkler irrigation conditions on a calcareous chernozem on loess terrace. The experiment included irrigation variants with pre-irrigation soil moisture of 60%, 70% and 80% of FWC (Field Water Capacity), and non-irrigated check control. Two varieties of onion, Alek and Kupusinski jabučar were tested. Onion bulb yield of irrigated variants, on average, (35.498 t ha-1) was statistically higher than those in the non-irrigated control (15.551 t ha-1). The highest bulb yield was obtained in the variant with pre-irrigation soil moisture of 60% of FWC (36.651 t ha-1), statistically different compared with yield obtained with pre-irrigation soil moisture of 70% of FWC (34.274 t ha-1), but without differences compared with pre-irrigation soil moisture of 80% of FWC (35.569 t ha-1). The values of soil moisture of 60 and 80% of FWC are the lower limit of optimum soil moisture, or the technical minimum (TM) when onion, produced by seeding, is grown on soil with medium mechanical texture. The quantity of water used for ETP of 482,7-493,8 mm, on average, in the variants of pre-irrigation soil moisture of 60 and 80% of FWC, may be considered as the water requirement of onion, when grown under climatic conditions of the Vojvodina Province. There were no significant differences between two tested varieties. Obtained yield (31.979 t ha-1) in warmer 2006 was statistically different than the yield obtained in rainy and slightly colder 2005 (29.324 t ha-1). There were no significant differences between 2005 and 2007 on the one hand and 2006 and 2007 on the other (30,511 t ha-1).
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article language: Serbian
document type: Original Scientific Paper
published in SCIndeks: 16/06/2008

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