Effect of Using Slow Release N Fertilizers Versus Fast Ones on Fruiting of Zaghloul Date Palms
Silem, A., Salama, M. (2020). Effect of Using Slow Release N Fertilizers Versus Fast Ones on Fruiting of Zaghloul Date Palms. EKB Journal Management System, 11(4), 295-299. doi: 10.21608/jpp.2020.95609
A. A. E. M. Silem; M. N. R. Salama. "Effect of Using Slow Release N Fertilizers Versus Fast Ones on Fruiting of Zaghloul Date Palms". EKB Journal Management System, 11, 4, 2020, 295-299. doi: 10.21608/jpp.2020.95609
Silem, A., Salama, M. (2020). 'Effect of Using Slow Release N Fertilizers Versus Fast Ones on Fruiting of Zaghloul Date Palms', EKB Journal Management System, 11(4), pp. 295-299. doi: 10.21608/jpp.2020.95609
Silem, A., Salama, M. Effect of Using Slow Release N Fertilizers Versus Fast Ones on Fruiting of Zaghloul Date Palms. EKB Journal Management System, 2020; 11(4): 295-299. doi: 10.21608/jpp.2020.95609

Effect of Using Slow Release N Fertilizers Versus Fast Ones on Fruiting of Zaghloul Date Palms

Journal of Plant Production
Article 2, Volume 11, Issue 4, April 2020, Page 295-299  XML PDF (394.46 K)
Document Type: Original Article
DOI: 10.21608/jpp.2020.95609
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Authors
A. A. E. M. Silem email 1; M. N. R. Salama2
1Hort. Dept. Fac. of Agric. Al-Azahar Univ. Assiut Branch, Egypt
2The centeral laboratory for Research and Development of Date Palm Giza agric.research center
Abstract
During 2016 & 2017 seasons, Zaghloul date palms received three slow release N fertilizers namely Sulphur-coated urea (41 %N), Phosphorus-coated urea (37.11%N) and Urea-formaldehyde (41%N) versus urea (46 %N) as fast release N fertilizer. Both slow and fast release N fertilizers were applied at 250, 500 or 1000g N/palm. The three slow release N fertilizers were added once at growth start while urea was splitted into three equal batches at growth start and two month intervals. The merit was selecting the best source and rate of N for Zaghloul date palms. Fertilizing the palms with N as slow release N fertilizers generally was superior than the application of N via fast source (urea) in improving growth, yield and fruit quality. Using N at 250 g N/palm via sulphur coated urea, phosphorus-coated urea, and urea-formaldehyde, in descending order was very effective in enhancing all the investigated parameters. Increasing N levels from 250 to 1000 g N/palm applied via any slow release N fertilizers failed to show measurable increase on the studied parameters.Carrying out N fertilization via sulphur-coated urea at 250 g N/palm was necessary for promoting yield and fruit quality of Zaghloul date palms growing under Minia region conditions.   
Keywords
Urea; Sulphur-coated urea; phosphorus-coated urea; and urea-formaldehyde; Zaghloul date palms; growth; palm nutritional status; yield; fruit quality
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