Selection of special compound fertilizer for spring plowing
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30%~40%.
The special fertilizer for tea special fertilizer tea is made by using urea, ammonium phosphate, potassium sulfate and appropriate amount of micronutrients such as magnesium and boron as the main raw materials. The effective nutrient content of nitrogen, phosphorus and potassium is ≥25%, and the yield of adult trees is mu. To determine the amount of fertilizer, the average yield of dry tea 50 kg, 100 kg, 150 kg, respectively, the application of special fertilizer 70 kg, 90 kg, 120 kg. According to the 50% of the total dosage in the first month before the spring tea mining, the spring tea accounts for 25% of the total fertilizer, and the autumn tea accounts for 25% of the total fertilizer before 15 to 20 days before the harvest.
Potassium sulphate fruit tree fertilizer potassium sulphate fruit tree fertilizer is based on urea, ammonium phosphate, potassium sulphate as the main raw material, nitrogen, phosphorus, potassium effective nutrient content ≥ 36%, according to mature trees 3 ~ 4 kg / plant year, evenly near the canopy drip line The application can be carried out by ring, circle application or strip application, and the groove depth is 30 cm.
Non-polluted vegetable fertilizer pollution-free vegetable fertilizer is based on urea, ammonium phosphate and potassium sulfate. The effective nutrient content of nitrogen, phosphorus and potassium is ≥35%, and the fruits and vegetables are 80~150 kg/mu, of which 30~60 kg. As a base fertilizer, 50~90 kg for topdressing. Leafy vegetables are 60~120 kg/mu, of which 15~40 kg are used as base fertilizer and 40~80 kg are used as top dressing.
(Xuehua Town, Da'an City, Jilin Province, Xue Hua)