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Tag: Yield

25 Nov 2022
Fruit size in Star Ruby Grapefruit.
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The usage of auxins with various cultural techniques to increase fruit size in Star Ruby Grapefruit

Fruit size is a key parameter for quality and increases the profitability for export markets in citrus production in Turkey. Fruit size can be enhanced by several techniques such as girdling and thinning. Various plant growth regulators are known to affect the growth and size of citrus fruit. Thus the effects of synthetic auxin applications (2,4-DP and 3,5,6-TPA) at different physiological periods, girdling practices, pruning practices, foliar application of potassium and various combinations of these practices on the fruit size and yield, fruit retention rate, and leaf chlorophyll concentration and fluorescence of Star Ruby grapefruit cultivar were investigated.

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25 Nov 2022
Regulated deficit irrigation Clementina de Nules
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Long-term response of ‘Clementina de Nules’ citrus trees to summer regulated deficit irrigation

Regulated deficit irrigation (RDI) has been assessed in a wide number of fruit crops. However, few are the studies dealing with long-term RDI strategies. In this work, we assessed the response of ‘Clementinade Nules’ citrus trees to summer RDI treatments [RDI-1, irrigated at 50% of crop evapotranspiration (ETc)and RDI-2, irrigated at 35% ETc] during six consecutive seasons (2007–2012). Although water restrictions were applied according to reductions over ETc, threshold values of stem water potential (−1.3 to −1.5 MPain the RDI-1 treatment and −1.5 to −1.7 MPa in the RDI-2) were also considered for scheduling deficitirrigation. Results showed that the water stress imposed in the RDI-2 treatment had a noticeable impacton fresh fruit weight, reducing yield and economic return over the six years and more so during the first two years in comparison to a control treatment irrigated at 100% ETc during the whole season. The RDI-1strategy had a lower impact than the RDI-2 treatment on the fresh fruit weight and did not significantly reduce yield or the economic return over the six seasons.

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