Yield and evapotranspiration of onion depending on different pre-irrigation soil moisture
2008
Pejic, B., Poljoprivredni fakultet, Novi Sad (Serbia) | Gvozdanovic-Varga, J., Institut za ratarstvo i povrtarstvo, Novi Sad (Serbia) | Vasic, M., Institut za ratarstvo i povrtarstvo, Novi Sad (Serbia) | Maksimovic, L., Institut za ratarstvo i povrtarstvo, Novi Sad (Serbia) | Milic, S., Institut za ratarstvo i povrtarstvo, Novi Sad (Serbia)
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. The experiment was conducted 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 Jabucar were tested. Onion bulb yield of irrigated variants, on average was statistically higher than those in the non-irrigated control. The highest bulb yield was obtained in the variant with pre-irrigation soil moisture of 60% of FWC, statistically different compared with yield obtained with pre-irrigation soil moisture of 70% of FWC, but without differences compared with pre-irrigation soil moisture of 80% of FWC. The values of soil moisture of 60 and 80% of FWC are the lower limit of optimum soil moisture, or the technical minimum 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 (Serbia).
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