บทคัดย่องานวิจัย

หมวดหมู่ : ฐานข้อมูลงานวิจัย

Effect of foliar application with calcium on yield and fruit quality of Valencia orange trees.

El-Shafey, Y. H.; El-Rahman, A. M. A.; El-Azaze, A. M.;

Bulletin of Faculty of Agriculture, Cairo University

2002

บทคัดย่อ

Effect of foliar application with calcium on yield and fruit quality of Valencia orange trees.

This experiment was carried out during 1996-97 and 1997-98 at El-Sharkia Governonrate in Egypt to study the effect of the foliar application of calcium (42, 84 and 126 ppm) at 3 spraying dates 15 of November, 15 February or two equal split application at 15 November and 15 February. Yield and fruit quality parameters were recorded. Calcium concentrations (84 and 126 ppm) at all application dates increased fruit pull force and fruit firmness proportionally. The best fruit pull force and firmness were obtained with spraying calcium at two equal split doses in November and February, followed by calcium applied on February. The lowest fruit pull force and firmness were obtained with calcium applied at November for both seasons. Fruit juice, total soluble solids (TSS) or TAC and TSS/TAC ratio were not significantly affected, except with calcium at 126 ppm in February which significantly decreased TSS. Calcium treatments caused significant reduction in fruit respiration rate. Calcium treatments had no significant effect on fruit yield, except 126 ppm which decreased in fruit weight.