Impact of Slow-Release and Organic Fertilizers on Growth, Yield, and CLUSTER Quality of Thompson Seedless Grapevines (H4 Strain) growing in Sandy Soil.
Y. El-Saman, A., E.Y. Habasy, R., H. M. Saied, H. (2024). Impact of Slow-Release and Organic Fertilizers on Growth, Yield, and CLUSTER Quality of Thompson Seedless Grapevines (H4 Strain) growing in Sandy Soil.. EKB Journal Management System, 4(1), 1-22. doi: 10.21608/ijmae.2024.266689.1024
Ahmed Y. El-Saman; Randa E.Y. Habasy; Hamdy H. M. Saied. "Impact of Slow-Release and Organic Fertilizers on Growth, Yield, and CLUSTER Quality of Thompson Seedless Grapevines (H4 Strain) growing in Sandy Soil.". EKB Journal Management System, 4, 1, 2024, 1-22. doi: 10.21608/ijmae.2024.266689.1024
Y. El-Saman, A., E.Y. Habasy, R., H. M. Saied, H. (2024). 'Impact of Slow-Release and Organic Fertilizers on Growth, Yield, and CLUSTER Quality of Thompson Seedless Grapevines (H4 Strain) growing in Sandy Soil.', EKB Journal Management System, 4(1), pp. 1-22. doi: 10.21608/ijmae.2024.266689.1024
Y. El-Saman, A., E.Y. Habasy, R., H. M. Saied, H. Impact of Slow-Release and Organic Fertilizers on Growth, Yield, and CLUSTER Quality of Thompson Seedless Grapevines (H4 Strain) growing in Sandy Soil.. EKB Journal Management System, 2024; 4(1): 1-22. doi: 10.21608/ijmae.2024.266689.1024

Impact of Slow-Release and Organic Fertilizers on Growth, Yield, and CLUSTER Quality of Thompson Seedless Grapevines (H4 Strain) growing in Sandy Soil.

International Journal of Modern Agriculture and Environment
Volume 4, Issue 1, June 2024, Page 1-22  XML PDF (754.52 K)
Document Type: Original Article
DOI: 10.21608/ijmae.2024.266689.1024
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Authors
Ahmed Y. El-Saman email orcid 1; Randa E.Y. Habasy* 2; Hamdy H. M. Saied* 3
1Viticulture Res. Hort Res. Instit. ARC. Giza, Egypt.
2Citriculture Dep. Res. Hort. Res. Instit. ARC. Giza, Egypt.
3Central Lab. For Organic Farming, Agricultural Res. Center. Giza.
Abstract
Starting in 2022, Thompson seedless grapevines (H4 strain) received 50 kg of actual nitrogen per Fed. (about 71.4 g N/ vine) combined from three different sources for two consecutive seasons. Control plants received 100% fast-release nitrogen fertilizer (NH4NO3 33.5% N). Treatment groups received triple combinations of 50% or 25% from NH4NO3, 25% or 37.5% organic N fertilizer (plant compost, 2% N), and 25% or 37.5% from one slow-release N fertilizer, namely urea formaldehyde (UF, 38.37% N), phosphorus-coated urea (PCU, 37.11% N), or Sulphur-coated urea (SCU, 41% N). The target was to select the best ratio and the preferred source of slow-release nitrogen.
Using nitrogen as 25% NH4NO3, 37.5% plant compost, and 37.5% slow-release nitrogen (UF, PCU, or SCU) significantly improved berries’ growth, yield, and physicochemical properties compared with other treatments. The results showed that the best slow-release nitrogen sources were SCU, PCU, and UF. Conversely, an apparent reduction in these traits was in the vines treated with 100% nitrogen as ammonium nitrate.
To enhance the growth, yield, and cluster quality of Thompson Seedless grapevines (H4 strain), it is recommended to utilize a combination of nitrogen fertilizers: 25.0% fast-release (NH4NO3), 37.5% organic (plant compost) and 37.5% slow-release (e.g., SCU).



Keywords
Thompson seedless grapevines; H4 strain; fast-release; slow-release; organic nitrogen fertilizers; urea-formaldehyde (UF); phosphorus-coated urea (PCU); sulphur-coated urea (SCU)
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