Water utilization of vegetables grown under plastic greenhouse conditions in Ankara using neutron probe technique
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Date
2006
Journal Title
Journal ISSN
Volume Title
Publisher
Institute of Nuclear Physics of Uzbekistan Academy of Science, Turkish Atomic Energy Authority
Abstract
In order to find suitable varieties of tomato, pepper and cucumber for plastic greenhouse conditions in Ankara and ensure both higher yields and lower NO3 leaching greenhouse experiments were conducted for three years. In the first year (2001) of the experiment four different varieties from each vegetable, namely, Tomato (Ecem F1, 9920 F1, 2116 F1 and Yazgı F1), Cucumber (Hızır F1; Rapido, Hana, and Luna) and Pepper (1245 F1, 730 F1, Serademre 8 and 710 F1) had been grown in the plastic greenhouse using drip irrigation-fertigation system. Yazgı F1 variety for tomato, Hızır F1 variety for cucumber and Serademre 8 variety for pepper were chosen to be the suitable varieties to grow in the plastic greenhouse conditions in Ankara.
One access tube in each N3 and N0 treatment plots of tomato, cucumber and pepper in 2002 and 2003 experiments were installed for the soil moisture determinations at 30, 60 and 90 cm depths. Readings with the neutron probe were taken before planting and after harvest for the water consumption calculations using the water balance approach and the WUE was calculated on the basis of the ratio of dry matter weight to the amount of water consumed.
Tensiometer and suction cups were installed at 15, 30, 45 and 60 cm depths only to N1, N2 and N3 treatments plots of each vegetable in 2002 and 2003. Tensiometer readings were taken just before irrigation. Also, soil solution samples from suction cups were taken at final harvest and NO3 determinations were done with RQFLEX nitrate test strips.
Significantly higher yields and WUE values were obtained when the same amount of N fertilizer is applied through fertigation compared to the treatment where N fertilizer applied to the soil then drip irrigated. The nitrate concentrations of the soil solution increased as the N rates increased and no NO3 had been found in the soil solution taken from 75 cm soil depth, indicating that no leaching of N fertilizer occurred beyond 75 cm soil depth.
Description
Keywords
Using neutron probe technique, Nötron sonda tekniği, Water utilization, su kullanımıS, Vegetables grown under plastic greenhouse conditions, Plastik sera koşullarında yetiştirilen sebzeler, Ankara
Citation
Halitligil, M. B. (2006). Water utilization of vegetables grown under plastic greenhouse conditions in Ankara using neutron probe technique. The Third Eurasian Conference Nuclear Science and Its Application : Proceedings, (s. 298-300). 5-8 October, 2004. Tashkent, Uzbekistan.