Influence of Different Dosage of Potassium Fertilizer on Growth of the Cucumber Seedling

[Objective] The study aimed to provide the theoretical foundation for cucumber fertilization in practice production.[Method] In the pot test,4 grads of K fertilizer as 0(CK),1,2,3,4 g/pot were set up to study the effect of different dosage of K fertilizer on growth of the cucumber seedling through determining the physiological indexes of cucumber seedlings applied K fertilizer with different concn.[Result] The different dosage of K fertilizer had great effect on the available K in the soil.In the tested concn.range of K fertilizer,with the increment of K fertilizer dosage,the contents of praline and Vc in cucumber seedlings increased and the activities of Catalase,Peroxidase and root raised to different degree.The praline content increased by 1.372 5 μg/ml on average when K fertilizer increased one grade.[Conclusion] Increasing K fertilizer dosage can enhance quality and yield of cucumber in certain concn.range of K fertilizer.