The first part of the paper studied the effects of K fertilizer on growth , nutrient uptake , yield and quality of tomato . It was designed four different levels : KI ( K20 = 120 mg/L) , K2 ( K20 = 440 mg/L) . K3( K:.0 = 760 mg/L) , !Ci( K20 = 1080 mg/L) . The results of soilless culture showed that the lower K in nutrient solution was disadvantageous to the tomato. Increasing the K level can improve the plant height, stem diameter, leaf area. The higher K level was advantageous to the total dry...
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