Abstract
The Effects of High and Low Zinc Doses On Plant Fresh Weight, Chlorophyll Content, and Calcium, Phosphorus and Iron Nutrition in Hydroponically Grown Tomato Cultivars
A short-term experiment was conducted with two tomato cvs, ‘Blizzard’ and MJberto’ in a Controlled Temperature (C.T.) room to test the effects of both low and high zinc concentrations on plant growth, chlorophyll and some water-sol uble macro and micro nutrient contents of the plant. Zn was added into nutrient solution at 0.154, 7.70 and 77,0 (.unol/l. Plant fresh weight, chlorophyll and macro and micro nutrient concentrations werewithin optimal range in 7.70 jimoi/l Zn treatment. The plants grown at 0,154 (.rmol/1 Zn exhibited P toxicity and those at 77.0 ¡.imol/l showed Fe deficiency. There were some cultivar differences in response to both low and high zinc, but no consistent relationship between cuitivars and nutrient concentration within the plant.
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