Effect of Different N Level on the Cucumber Yield and Quality in Substrate Culture

Taking cucumber as material.The growth,yield and quality of cucumber grown under the cultivation mode of Matrix-nutrient solution by changing the concentration of N in nutrient solution and the EC value of nutrient solution while the concentrations of the other nutrients remains unchanged.The results showed that parameters related to the growth of cucumber were the highest when the plants were grown at-20% N treatments,which were significantly higher than that of the plants grown at the other treatments,and the changes of yield per plant and quality of cucumber fruits follows the same trend.In the second stage of the research,four different concentration gradients of nutrient solution treatment were designed based on the results of the first stage of the experiment(expressed as EC,mS/cm).Both of parameters related to the growth of cucumber plants and the quality of cucumber fruits were the highest for the pants grown at EC 3.5mS/cm.