Attempts to Improvement the Growth and Fruiting of Flame Seedless Grapevines Growing in Sandy Soil Using Slow-Release Nitrogen Fertilizers | ||||
| Hortscience Journal of Suez Canal University | ||||
| Volume 12, Issue 1, 2023, Page 10-17 PDF (443.83 K) | ||||
| Document Type: Original Article | ||||
| DOI: 10.21608/hjsc.2023.337427 | ||||
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| Authors | ||||
Hussien H.M. Saeed1; Mubarak A. Shoug  2
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| 1Hort. Dept. Fac. of Agric. and Natural Resources, Aswan Univ. Egypt | ||||
| 2Hort. Dept. Fac. of Agric. Al- Azhar Univ. (Assiut branch) Egypt. | ||||
| Abstract | ||||
| Flame seedless grapevines received 40 unite (N) of real nitrogen per feed over the 2020 and 2021 growing seasons. Approximately 57.1 g/N/vine of nitrogen was applied as 100% mineral fast release fertilizers (Ammonium nitrate) or as 25–50% quick release N fertilizers, specifically urea formaldehyde, urea with a phosphate coating, and urea with a sulfur coating. The purpose was to choose the optimal slow-release Nitrogen fertilizers and ratio among various Nitrogen sources. In terms of growth and yield, besides the physical and chemical traits of the berries, using nitrogen as 25% fast-release mineral nitrogen (ammonium nitrate) in addition to 75% slow-release nitrogen fertilizer (urea formaldehyde, phosphorus-loaded urea, and sulfur-loaded urea) produced the best results. With the application of nitrogen as a 100% fast-release mineral, ammonium nitrate, these features were reduced. Urea with a sulfur coating was the most effective slow-release Nitrogen fertilizer in this respect, followed shortly thereafter by urea alongside a phosphorus coating and urea-formaldehyde. It is advised to use 25% fast release nitrogen (ammonium nitrate plus 75% slow-release nitrogen fertilizer) for Flame seedless grapevines to increase yield and berry quality (sulfur-coated urea). | ||||
| Keywords | ||||
| Ammonium nitrate; urea formaldehyde phosphorus; coated urea | ||||
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