INFLUENCE OF NITROGEN AND POTASSIUM FERTILIZATION ON YIELD AND QUALITY OF TWO SUGAR BEET VARIETIES. | ||||
| Egyptian Journal of Agricultural Research | ||||
| Article 14, Volume 83, Issue 3, September 2005, Page 1237-1254 PDF (521.54 K) | ||||
| Document Type: Original Article | ||||
| DOI: 10.21608/ejar.2005.247589 | ||||
 View on SCiNiTO | ||||
| Author | ||||
| ADEL M. H. OSMAN | ||||
| Sugar Crops Research Institute, Agricultural Research Center, Giza, Egypt | ||||
| Abstract | ||||
| Two field trials were carried out at Sakha Research Station (Kafr EI-Sheikh Governorate) during 2002/2003 and 2003/2004 seasons. Each experiment consisted of 18 treatments repesenting two varieties (Pleno and Kawemira) and three nitrogen fertilizer levels (65, 80 and 95 kg N/fed) and three potassium fertilizer levels (zero, 24 and 48 kg K20/fed). Treatments were arranged in split split plot design with four replications. Varieties were assigned in the main plots, nitrogen fertilizer levels were assigned to the sub plots and potassium fertilizer levels were randomly distributed in the sub-sub plots. Increasing N level up to 95 kg N/fed showed significant effects on root length in both seasons and higher leaf area index, total dry weight of leaves, leaf/weight ratio, root diameter, root fresh weight, root top ratio, total soluble solids% and sugar yields. On the contrary total soluble solids, sucrose and purity percentages were decreased. Potassium fertilizer showed significant effects on total soluble solids% in the 1st season, leaf/weight ratio and top yield in the 2nd season and leaf area index, total dry weight of leaves, root length, root diameter, root sucrose%, purity%, root/top ratio sugar yield (tons/fed) in both seasons. The highest values of root yield (45.53 and 41.96 ton/fed) and sugar yield (6.76 and 5.95 ton/fed) resulted from the interaction between Kawemira variety, along with the application of 95 kg N/fed and 48 kg K20/fed in both seasons. | ||||
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