Pepper is a vegetable crop that requires a large amount of fertilizers. The implementation of balanced fertilization techniques can not only reduce fertilizer waste and environmental pollution, but also effectively increase the yield and quality of pepper, and achieve good ecological and economic benefits. Pepper has the highest potassium uptake throughout its life, followed by nitrogen and phosphorus.

Excessive application of nitrogen fertilizer will promote the vegetative overgrowth of pepper plants, easily lead to calcium deficiencies in fruit and produce umbilical rot, and early flowering should pay special attention to controlling nitrogen fertilizer to prevent delaying reproductive growth due to plant lengthiness. With the growth of pepper plants, the absorption of phosphorus increased, but the total absorption of phosphorus in its growth period was only 1/3 of nitrogen. Potassium application is beneficial to the synthesis and transportation of photosynthetic products of peppers, which can enhance the resistance of plants, increase the content of vitamin C in fruits, effectively reduce the content of nitrate nitrogen in peppers, promote the coloration of fruits, and improve the commercial quality. The amount of nitrogen fertilizer required during the growth period is relatively large. During the reproductive growth period, nitrogen fertilizer should be controlled. In combination with the application of phosphorus and potassium fertilizers, the fruit and vegetable stage should be top-dressed in stages. The amount of fertilizer needed from the second layer of fruit should be increased gradually. Pepper fertilizer should adhere to the combination of organic fertilizer and inorganic fertilizer, apply enough base fertilizer, suitable fertilizer, potassium supplement, and less application of ground facilities. Pepper top dressing is in high temperature period, especially when topdressing ammonium fertilizer, urea and other nitrogenous fertilizers. Take control when the weather is cool, morning and evening.

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