Effects of Different Compound Fertilizer with Different Levels on Growth and Yield of Sweet Pepper in Protected Field

[Objective] The study aimed to provide references on compound fertilizer.[Method] With Sweet pepper 9133 as the tested materials,took field plot as the method,3 treatments of different compound fertilizer and 3 fertilizer ratios were set up to study the effects on growth and yield.[Result] There were promoting effects of compound fertilizer with different levels on plant height and stem diameters,increasing along with increase of fertilizer.When the level reached a certain level,yield reduced with the application.[Conclusion] The optimum application was medium soil fertility and improved the potassium ratio would helpful to pepper yield.