Effect of different potassium to nitrogen ratios on some growth and morphological characteristics of Gerbera jamesonii

Cut Gerbera is one of the most important ornamentals in the floriculture industry. Flowering continuance and highquality flower production are in relation with precisenutrition and using of exact ratios of nutritional elements. Potassium to nitrogen ratio in nutritional solutions is one of the determinative factors in growth and flowering of gerberas. The effect of different potassium to nitrogen ratios on some morphological and growth characteristics of cut gerbera investigated hydroponically as a complete randomized design with four replications. Potassium to nitrogen ratios were 1.25:1, 1.5:1, 1.75:1 and 2:1 respectively. The ratio of 1.5:1 assumed as a control. In this research, some traits such as leaf length, flower stock length, flower diameter, the wet and dry weight of flower with stock and chlorophyll index were studied. Results showed that different treatments had a significant effect on leaf length and the potassium to nitrogen ratio of 2:1 results in longest leaves, 9 centimeters longer than control. Leaf length was 51 and 42 centimeters in potassium to nitrogen ratio of 2:1 and control respectively. Also, the maximum wet weight of flower occurs in 2:1 ratio of potassium to nitrogen. Flower weight in this ratio was 41.14 grams, 11.69 grams more than control. There are no significant differences between treatments related to other characteristics

کلیدواژه ها:

Chlorophyll ، Gerbera ، Growth characteristics ، Nutrition