الفهرس 
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Abstract
Effect of spraying with zinc and some amino acids on growth, yield, oil, production and plant constituents of caraway ( Carum carvi, L ) plants =
Seham Ahmed Ali Diab ; Abd El-Ghafour Awad El-Sayed, Ahmed Salama El-Leithy, Mohamed Salah El-Dein Mokhtar El-Shorbagy.
20/10/2007
Shoukry Mahmoud Selim, El-Saady Mohamed Badawy, Abd El-Ghafour Awad El-Sayed, Ahmed Salama El-Leithy.
This study was conducted during two successive seasons of 2003/2004 and 2004/2005 at the Experimental Farm of Ornamental Horticulture Department, Faculty of Agriculture, Cairo University to study the effect of zinc at 0, 50 and 100 ppm and some amino acids, tryptophan at 0, 50 and 100 ppm and methionine at 0, 25 and 50 ppm on growth, yield, oil production and chemical composition of caraway (Carum carvi, L.) plants. The results showed that zinc application had no significant effect on plant height in the first season, number of branches / plant, dry weight / plant, root length and number of umbels / plant in both seasons. whereas zinc at 50 ppm significantly increased plant height and dry weight / plant in the second season. Zinc at 50 and 100 ppm significantly increased fresh weight / plant in the two seasons, fruit yield / plant and oil yield/ plant in the second one. Zinc at 50 and 100 ppm insignificantly increased oil percentage in both seasons. Zinc at 50 and 100 ppm decreased limonine percentage in the oil and increased carvone percentage in the oil in the two seasons, total carbohydrates contents in both of leaves and roots in the first season. Zinc at 50 ppm increased total carbohydrates in the fruits in the first season, while 100 ppm increased it in the leaves, fruits and roots in the second one.
Tryptophan and methionine had a significant effect on plant fresh and dry weights in both seasons. The most effective treatment was methionine at 50 ppm. Tryptophan and methionine at 50 ppm gave the highest fruits yield / plant in the first and second seasons, respectively. Amino acids (tryptophan and methionine) insignificantly increased volatile oil percentage and oil yield / plant in the first season. whereas, methionine at 25 ppm significantly decreased oil percentage in the second season. Methionine at the highest rate (50 ppm) decreased limonene and increased carvone percentages in caraway essential oil in both seasons. Amino acids application increased total carbohydrates percentage in the leaves in the first season, in the fruits and roots in the two seasons.
Interaction between zinc and amino acids (tryptophan and methionine) had a significant effect on most vegetative growth characteristics, fruit yield / plant, oil percentage and oil yield / plant, and increased limonine and carvone contents in the oil and total carbohydrates percentage in different plant organs.