EFFECT OF SOME GROWTH SUBSTANCES ON KHELLA PLANT (Ammi visnaga, (L.) LAM.) GROWING UNDER DIFFERENT LEVELS OF POTASSIUM FERTILIZER | ||||
| Journal of Plant Production | ||||
| Article 23, Volume 34, Issue 7, July 2009, Page 8165-8176 PDF (508.43 K) | ||||
| Document Type: Original Article | ||||
| DOI: 10.21608/jpp.2009.118801 | ||||
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| Authors | ||||
| M. Y. A. Abdalla1; M. A. Khafagy2; S. M. A. Salama2 | ||||
| 1Veget. and Flor. Dept., Fac. of Agric., Mansoura Univ. | ||||
| 2Agric. Bot. Dept., Fac. of Agric., Mansoura Univ. | ||||
| Abstract | ||||
| Two pot experiments were conducted at the Experimental Station and in the Laboratory of Vegetable and Floriculture Department, Faculty of Agriculture, Mansoura University during the two successive seasons of 2005/2006 and 2006/2007 to study the effect of GA3 and ABA at different concentrations on vegetative growth, yield and chemical composition of khella plants growing under different potassium fertilization rates. The obtained results exhibited that khella plant height, shoot dry weight and content of photosynthetic pigments in the leaves as well as N, P and K concentrations in the shoots were increased with increasing potassium fertilization levels and the highest values were recorded when the plants received the high level of potassium (45 kg/fed.). GA3 and its interactions with potassium fertilization increased significantly the plant height, shoot dry weight and N, P and K concentrations in the shoots, while the content of photosynthetic pigments in the leaves was decreased. On the other hand, ABA and its interactions with potassium caused a decrease in the previous parameters except for the content of photosynthetic pigments in the leaves which was increased. Regarding number of umbels and fruit yield per plant as well as the content of khellin and visnagin (%), data showed that potassium fertilization and ABA as well as their interactions significantly increased these parameters. However, GA3 application alone caused a decrease in number of umbels and fruit yield per plant as well as the principle constituents (%). Meantime, GA3 with potassium fertilization at either 30 or 45 kg/fed. increased the fruits content of visnagin. | ||||
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