Abstract
Nutritional status, yield and fruit quality of Wonderful pomegranate trees grown in sandy calcareous soil in response to spraying Royal jelly at 0.0125, 0.0250 and 0.050% and frequencies, once (at the end May) twice (at the end of May and again at mid-June) and three applications (at the end May, mid-June and the end of August) were investigated during 2017 and 2018 seasons. spraying Royal jelly was very effective in improving the leaf area, leaf chlorophylls contents and total carotenoids, N, P, and K, yield and fruit quality rather than non- application. The gradual Increasing in Royal jelly concentration and frequencies was remarkably enhancing yield and fruit quality. However, non-significant differences were observed between the two heights concentrations. The best results with regard to vegetative growth, yield and fruit quality of Wonderful pomegranate trees grown under sandy calcareous soil were obtained when the trees received three sprays of Royal jelly at 0.05%. However non-significant differences were obtained between the two highest concentrations of Royal Jelly namely; 0.0250 and 0.050%.
Highlights
Rose (Rosa hybrida L.) is the most important member of the Family Rosacea, which contains 200 species and more than 18,000 cultivars (Gudin, 2000), grown as ornamental plant around the world
The aim of the present study is to evaluate the performance of different amino acids on the growth and flowering of rose plants in different soilless culture systems
Phenylalanine acid followed by proline acid significantly increased leaf number/plant, leaf fresh weight/plant, leaf length and width as well as root length compared to the other amino acids under study during both seasons
Summary
Rose (Rosa hybrida L.) is the most important member of the Family Rosacea, which contains 200 species and more than 18,000 cultivars (Gudin, 2000), grown as ornamental plant around the world. Soilless culture system represents a valid alternative to conventional cultivation techniques due to the full control of the inputs that provides, and it is a good technique to grow rose offering guarantees of quality to the market (Nicola et al., 2005). It allows to produce clean material at harvest, and to reduce many washing treatments. The cost of production by the NFT is to the soil grown plants
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