Two years results for water deficit irrigation in processing tomato on sandy soil

Both the production and consumption of tomato, show a constantly increasing trend worldwide. The greatest growing areas in the World to raise Brix applied the water „cut off” method 3-4 weeks before harvest. In Hungary, we cannot successfully use this method. The target of our examination is to find out if the “deficit irrigation” method can be successfully applied on the sandy soil of Kecskemét. We have found differences in the measured parameters between non-irrigated and highly irrigated plots. The year effect on the open field is very high, which influenced our results

Effect of irrigation and fertilisation on the biologically active components of tomato

Abstract A three-year (2016–2018) open field experiment was conducted to study the effect of irrigation, fertilisation, and seasonal variation on the main bioactive components, such as carotenoids (lycopene and β-carotene), total polyphenols, antioxidant capacity, and tocopherols of processed Uno Rosso F1 tomato. The statistical evaluation of measurements proved that the multi-year data set cannot be evaluated as combined data set; the values obtained in different years must be evaluated separately. The impact of irrigation on the content of bioactive components varied from year to year. The correlation was negative between irrigation and α-tocopherol content in 2016 and 2018 (r = –0.567 and –0.605, respectively), polyphenol content in 2016 (r = –0.668), γ-tocopherol content in 2017 (r = –0.662), while positive correlation was observed between concentration of vitamin C (r = 0.533) in 2017, lycopene content (r = 0.473) in 2018 and irrigation intensity. A weak correlation was proved between K levels and concentrations of lycopene and polyphenols in 2016 (r = 0.301 and r = 0.392, respectively)