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)
High speed shutter door is a rapid operating, anti-crash shutter door for indoor application . The most advantage of this door is that the opening/closing speed can reach to 0.6-1.8m/s, really fast action a lot than tranditional rollling shutter door. short opening and closing times reduce cooling loss, avoid airflow and enable a smooth operating procedure. They can also be designed in larger dimensions for the mining and aircraft industries.
High speed door can be easily installed, economical,quiet and efficient with electromechanical drive.
This door quickly though in/out open gate, ideal for warehouses,factories, hangars use, widths can be from 2m to 20 meters.
The material of this door are variety: PVC curtain to keep the insdie clean, heavy duty aluminum door with wind-resisitant function can wrok in heavy windy weather, and also the freezer door can be used in cold warehouse or somewhere like that.
Including models are:PVC High Speed Door, Aluminum Spiral High Speed Door, Self-Recovery repair door, Cold Storage Room Fast Door.
High Speed Door,PVC High Speed Door,Aluminum High Speed Door,Spiral High Speed Door
Shenzhen Hongfa Automatic Door Co., Ltd. , https://www.hffastdoor.com