What are the main measures to develop formula fertilizer?

Fertilizer is the food for the growth of tea trees and the material basis for increasing tea production and improving tea quality. Therefore, fertilization plays an important role in the growth of tea trees and the yield and quality of tea. Good fertilization technology can maximize the yield-increasing effect of fertilization, maintain and improve the excellent quality of tea, maintain the vigorous growth of tea, and help restore and improve soil fertility. However, improper fertilization can not only improve the yield of tea, but also cause a serious decline in the quality of tea, and even adversely affect the growth of tea trees. Therefore, fertilization in tea garden requires adapting to local conditions, adopting appropriate fertilizer types and methods, giving full play to fertilizer efficiency and achieving the purpose of fertilization.

Factors such as variety characteristics, soil conditions, yield level and cultivation methods should be considered in fertilization of tea trees. In addition, organic fertilizer is mainly used, and inorganic fertilizer is used in combination.

Organic fertilizer is a kind of comprehensive fertilizer, rich in organic matter, with slow and lasting fertilizer effect, which has a good influence on tea tree growth, tea yield and quality, and can improve soil. Therefore, fertilization must be based on organic fertilizer. Traditional organic fertilizers commonly used in tea include human excrement, manure, cake fertilizer, compost and green manure. At present, the special organic fertilizer for tea has been introduced in the market, which is more targeted, efficient and convenient to apply than the traditional organic fertilizer. Inorganic fertilizer is a quick-acting fertilizer with fast fertilizer efficiency. In the vigorous season of tea tree growth and picking, a lot of nutrients need to be consumed, and some elements are often insufficient. It must be supplemented in time to meet the normal needs of tea tree growth. Therefore, it is necessary to cooperate with the application of inorganic quick-acting fertilizer. Ammonium sulfate, ammonium nitrate, ammonium bicarbonate and urea are commonly used in traditional organic fertilizers for tea. Phosphate fertilizer includes superphosphate, phosphate rock powder and bone powder; Potassium fertilizer includes potassium sulfate and potassium chloride. At present, applying special compound fertilizer for tea is the main method.

The specific measures and dosage are: 1, base fertilizer (65438+1middle and late October-165438+1end of October): nitrogen fertilizer 40%, phosphorus fertilizer 50% and potassium fertilizer 40%; 2. First topdressing (end of May): 30% nitrogen fertilizer, 25% phosphorus fertilizer and 30% potassium fertilizer; 3. Second topdressing (end of July): 30% nitrogen fertilizer, 25% phosphorus fertilizer and 30% potassium fertilizer.