الفهرس 
Effect of foliar applications on Terminalia arjuna seedlings under Drought and salt stresses in Egypt and Sudan
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Abstract
This study was carried out at the nursery of the Ornamental Plant Research Department, Horticulture Research Institute, Giza, Egypt in the two seasons of 2016/2017 and 2017/2018, to investigate the effect of foliar spray of salicylic acid at 0.5, 1.0 and 1.5 mM, moringa leaf extract at 2.5, 5.0 and 10% and seaweed extract at 2.5, 5.0 and 7.5% on the tolerance of Terminalia arjuna seedlings to drought and salinity. The seedlings were subjected to 2 experiments: The first experiment aimed to determine the effect of foliar applications with irrigation intervals at 4, 8 and 16 days. The second experiment aimed to study the effect of foliar applications with salinity levels at 2000, 4000 and 6000 ppm NaCl. The experiments were designed as factorial in a completely randomized design. The results could be summarized as the following: In the first experiment, irrigated plants at 4 days + seaweed extract 7.5% and /or moringa leaf extract at 10% achieved the highest results for all vegetative growth characters and contents of chlorophyll a, chlorophyll b, carotenoids, total carbohydrates, N,P,K, and Ca, compared to other treatments. In the second experiment, salinity at 2000 ppm + seaweed extract at 7.5% and / or moringa leaf extract at 10.0% treatments obtained the best results of all vegetative growth characters and the contents of more chemical constituents compared to other treatments. Also, salinity at 6000 ppm NaCl + seaweed at 7.5% gave the highest proline content