RESPONSE OF GIZA 89 COTTON CULTIVAR TO FOLIAR APPLICATION OF ASCORBIC ACID, GIBBERELLIC CIO, PHOSPHORUS AND POTASSIUM | ||||
| Journal of Plant Production | ||||
| Article 2, Volume 28, Issue 3, March 2003, Page 1579-1597 PDF (1.16 MB) | ||||
| Document Type: Original Article | ||||
| DOI: 10.21608/jpp.2003.242479 | ||||
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| Authors | ||||
| W. M. O. EI-Shazly,1; M. F. EI-Masri2 | ||||
| 1Cotton Research Institute, Agricultural Research Center, Ministry of Agriculture, Giza, Egypt. | ||||
| 2Botany Department, National Research Center, Dokki, Cairo, Egypt | ||||
| Abstract | ||||
| Two field experiments were carried out at Gemmeiza Agricultural Research Station, Gharbia Governorate during two seasons (2000 and 2001) to study t~e effect of foliar app6cation with 1000 ppm ascorbic add (AA), 100 ppm gibberellic acia (GAJ), 2% calcium superphosphate (SP) and 2% potassium sulphate (KS) in compartson with untreated plots (spraying wilh water) as a control on leaf nutrients content, growth, eerliness, seed cotton yield and yield components of Giza 89 collon cultivar . The obtained results could be summarized as follows: t-Foliar application of 1000 ppm AA, signirlCanUy Increased leaf N, P, Ca. Fe, Zn and Mn contents as compared with the control treatment. However, this Ir alment insignificanlly reduced leaf Cu content and Increased leaf K and Mg contents compared with the control. This treatment significantly increased also planl height at harvest as compared with the control treatment or foliar feeding with P or K due to the number of main stem internodes increase, however. it reduced the average internode length. In addition, this treatment Significantly increased numbers of total and open bons! plant, boll weight, seed cotton yieldl plant as well asl reddan as compared with the control treatment. 2·Foliar application of 100 ppm G~, significantly increased lear macronutrients content (N, P, K, Ca and Mg) and leaf micronutrlents content (Fe, Zn, Mn and Cu) as compared wilh the control trealment In both seasons. Also, Ihis treatment significantly increased plant height at harvest as compared with the other tested treatments due to a significant increase in each of number of main stem internodes andlor internode length and number or fruiting branchesl plant. In addit on, this treatment significantly increased numbers or total and open bollsl plant in the firsl season and boll weight, seed cotton yieldl plant as well as! fed dan in both easons as compared with the control trealment. 3-Foliar application of 2% SP increased leaf N, p, Mg and Mn and reduced lear K. Ca. Fe, Zn and Cu contents in both seasons compared with the ccntrot treatrnent This treatment produced the shortest plants with lower number of shorter internodes compared with the control treatment. In addition. this treatment increased seed cotton yield' reddan and its components but to a tess extent, as compared with (he other tested treatments. 4-Foliar application of 2% KS produced the highest values of leaf N. K, Fe and Mn contents compared to the other tested treatments, but. decreased leaf Mg content as compared with the control treatment. Also, this treatment produced pi nts with the same height of the control plants but significantly increased the numbe of main ~tem intemodes and hence decreased the average lnterncce length compared with the control. In addition, this treatment signifICantly increased numbers of total and open bollsl plant, boll weight. seed cotton yieldl plant as well as! feddan compared with the control treatment. 5-AII treatments had insignificant effect on earliness %, lint %. seed index and number of seeds! boll. | ||||
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