EFFECT OF CALCIUM AND GIBBERELLIC ACID SPRAYS ON YIELD, QUALITY AND ABSCISSION OF GRAPEFRUIT | ||||
| Journal of Plant Production | ||||
| Article 9, Volume 29, Issue 3, March 2004, Page 1239-1255 PDF (487.42 K) | ||||
| Document Type: Original Article | ||||
| DOI: 10.21608/jpp.2004.238581 | ||||
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| Authors | ||||
| R. A. Sayed,1; A. Z. Sabh2; A. I. Ibrahim3 | ||||
| 1Horticultural Res. Inst., Agric. Res. Center, Giza, Egypt. | ||||
| 2Botany Dept., Fac. of Agric., Cairo Univ., Giza, Egypt. | ||||
| 3Soils and Water Res. In st., Agric. Res. Center, Giza, Egypt. | ||||
| Abstract | ||||
| This study was carried out to evaluate the effect of Calcium nitrate (Ca(NOJ)2) at 0.1 % and Gibberellic acid (GA3) at 25 ppm on grapefruit trees during the petal fall (PF) through the two successive seasons 1999/2000 and 2000/2001. It could be concluded that. (Ca(NOJ)2) and GA3 increased the fruit yield per tree. In addition to.the application of (Ca(NOJ)2) or GA3. separately or combined together significantly improved the physical and chemical fruit properties; e.g. fruit weight (g),fruit size (cm\ peel thickness (cm), juice %, TSS %, acidity %, TSS/acidity ratio, total sugar (mg), vitamin C (mg). In addition to, Chlorophyll (A and 8) content in leaf tissues. All treatments also Significantly increased leaf mineral content. The anatomical results indicated that. treatments fundamentally affected the internal features of both the juncture of pedicel and fruitlet as well as the leaf structure. Combined treatments gave the best results in reducing abscission as the thickness of both the juncture zone and the pedicel as well as degree of both connections of vascular system and cell adhesion in union zone were the highest. Moreover, the anatomical leaf features were the best as the combined treatments were applied. | ||||
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