Effect of Spraying Seaweed Extract Applications on Vegetative Development Traits and Leaves Chemical Content of Thompson Seedless Grapevines | ||||
| Assiut Journal of Agricultural Sciences | ||||
| Article 19, Volume 56, Issue 2, April 2025, Page 278-292 PDF (479.25 K) | ||||
| Document Type: Original Article | ||||
| DOI: 10.21608/ajas.2025.354792.1458 | ||||
 View on SCiNiTO | ||||
| Authors | ||||
Alaa A. B. Masoud  1; Omar A. Alsanosy2
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| 1Pomology Department, Faculty of Agriculture, Assiut University, Assiut, Egypt. | ||||
| 2Faculty of Industry and Energy, Thebes University of Technology, Luxor, Egypt. | ||||
| Abstract | ||||
| The present study was conducted on 20-years old Thompson seedless grapevines (Vitis vinifera L.), throughout two successive seasons of 2022 and 2023 seasons. The purpose of this study was to examine the effects of seaweed extract foliar sprays on the growing and yield of Thompson seedless grapevines in a private vineyard situated west of El-Wasta Center, Assiut Governorate, Egypt. The experiment included 4 treatments individual seaweed extract as foliar application in Randomized complete block design (RCBD) with three replicates as following: Control (sprayed with tap water), Seaweed extract (0.1%), Seaweed extract (0.2%) and Seaweed extract (0.4%). The following characteristics were measured: vegetative aspects, i.e. h. Main shoot length, number of shoots leaves/plant, leaf area, lumber weight and cane thickness, chemical properties of Thompson seedless grapevine leaves (chlorophyll a, b, total chlorophyll, total carotenoid, leaves N, P, K, Zn, Fe and Mn) and yield. The treatments showed that the highest concentrations of 0.2% and 0.4% seaweed extract increased vegetative growth parameters with no significant difference between them. The highest values of the mentioned aspects were recorded for seaweed extract treatments (0.4%), followed by (0.2%) for eaclgah of them, with no significant differences between them during each two seasons. The lowest average vegetative traits served as controls. The effect on yield of 'Thompson seedless' grapevine assessed by kg/vine and at different concentrations of foliar-applied seaweed extract compared to the control treatment. | ||||
| Keywords | ||||
| Foliar application; vegetative aspects; Grapevine; Seaweed extract; Thompson seedless | ||||
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