EFFECT OF NITROGEN, PHOSPHOURS AND POTASSIUM FERTILIZATION ON YIELD AND QUALITY OF SUGAR CANE

Two field trials were carried out at Mattana Agricultural Research Station, (Qena Governorate) on sugarcane grown in 2002/2003 and 2003/2004 seasons. Each trail Included eighteen treatments represent the combination between three levels of nitrogen (180, 210 and 240 kg N/fed), phosphorus fertilizer (30, 45 and 60 kg P205/fed) and two levels of potassium (24 and 48 kg 140/fed). Sugar cane was planted during the first week of March and harvested after12 months. The commercial planted sugarcane variety viz. Ph. 8013 was used. A split plot design was used in both seasons. Nitrogen levels were allocated in the main plots while the combinations of phosphours and potassium levels were random* distributed 111 the sub plots. The results showed that Increasing nitrogen fertilizer levels significantly number of plants/&, cane and sugar yields in the I' season and sugar recover" in the 2'⁴ season, while stark height and number of minable cane/fed were significantly in both seasons. Increasing phosphours fertilizer levels significantly number of plants/m², stalk height, reducing sugars, purity% and sugar recovery% as well as cane yield and sugar yield in the 2^•4 season and number of minable cane/fed in both seasons. Increasing potassium fertilizer levels significantly number of millable cane/fed in the 2^r0 season. While, leaf area and stalk height in both seasons. The highest cane yields (46.60 and 49.77) (tons/fed) were obtained by applying 240 kg N/fed, 45 k9 PA and 24 kg K,0/fed in the 1^ci season and 240 kg N/fed, 30 kg PA and 48 kg 40/fed in the 2'^d season, respectively. The highest sugar yields (5.75 and 6.13) (tons/fed) were obtained by applying 240 kg N/fed, 45 kg PA and 24 kg 40/fed in the l^g season and 210 kg N/fed, 30 kg PA and 24 kg 820/fed in the 2'⁴ season, respectively.