ISHS Acta Horticulturae 449: II International Symposium on Irrigation of Horticultural Crops
EFFECTS OF NITROGEN FERTILIZATION ON GROWTH, LEAF NUTRIENT CONCENTRATION AND PHOTOSYNTHESIS IN THREE PEACH CULTIVARS |
| Authors: | D. Almaliotis, I. Therios, M. Karatassiou |
| Keywords: | Prunus persica, GF 677, nutrient solution, chlorophyll, transpiration, stomatal conductance, water use efficiency |
| Abstract:
One year old peach plants of the cvs. Springcrest, Redhaven and Suncrest grafted on the almond x peach hybrid GF 677 were maintained in a greenhouse and irrigated once per day for 75 days with 100 ml of modified Hoagland's nutrient solution containing 0.1, 0.25, 1 and 2 mM N. The growth of Suncrest at 0.25 and 2 mM was less than that of the cv. Redhaven. Nitrogen content of upper and basal leaves increased by increasing N level of nutrient solution and was correlated significantly with most of the growth parameters as well as with total chlorophyll content. Nitrogen content of upper and basal leaves of the cv. Suncrest at 0.1 mM N was higher than the N content of the other two cultivars. Nitrogen concentration of leaves was correlated significantly with the rest nutrients in most cases. Leaf transpiration rate and stomatal conductance showed a trend to be lower in Redhaven than in the other two cultivars while not important differences in the rate of net photosynthesis among treatments were recorded. | |
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