The following top dressings were topped with 20-30 kg of potassium sulfate compound fertilizer or 10 kg of potassium treasure and 5 kg of urea, or 10 kg of potassium sulfate and 10 kg of urea. You can top-dress four times in the normal season (the time is as follows).
1. High-temperature period: From sowing to mid-to-mid-September, cucumbers are in the period from the seedling stage to the melon stage. Before harvesting roots, it is generally not necessary to top-dress water to prevent cucumber growers. Usually about 40 days to harvest root melon, at this time, the cucumber is basically full, that is, the main vine to stay 22-25 topping. When root melons are harvested more than 90% (around September 10), top dressings should be combined with watering. The special attention to this watering is to prohibit flooding. Otherwise, the temperature difference between the water and the roots will be too large, which will cause serious damage to the flowers and pomegranate. During this period, high temperature and rain, in addition to the roof buckle film, surrounded by open ventilation, play a cooling effect of rain in the shelter, the film can be put down when it rains, immediately after the rain stopped, and pay attention to the timely discharge of seedlings flood control, Prevent the accumulation of stagnant water in the raft and cause the roots to suffocate and suffocate.
2, the appropriate temperature period: from early September to early October, is the post-autumn greenhouse cucumber growth period. This is the most critical period of production, and more attention should be paid to disease prevention and nursing to create a suitable environment for cucumber production. The temperature of most diseases is moderate at 20°C-25°C. Therefore, the specific management method of greenhouses is to eliminate exhaust gas and moisture during the 20-60 minutes before sunrise. Then close the shed to quickly increase the temperature to 25 °C above, combined with the air temperature to maintain the temperature of 25-28 °C, drip irrigation sheds and sheds to pay attention to maintaining the greenhouse humidity, to avoid high temperature burning. In the afternoon, when the temperature of the shed is reduced by about 25°C, increase the amount of ventilation to reduce the temperature to 18-20°C. The lowest temperature in the outside world is higher than 15°C. When the cloudy sky is weak, it is necessary to release the wind throughout the day and pay attention to splashing into the shed. Watering should be carried out in the morning and in the morning. After watering, the temperature in the shed should be raised to 32°C or more after the watering. After 1 hour, let the air release. If the shelf temperature drops below 25°C for 2 hours, the temperature can be raised again. Increase air release and humidity. At this stage, due to the high humidity of the air, the actual cultivation usually only has two times of watering and fertilization (around September 20 and early October), and the amount of fertilizer is far from enough. It is necessary to spray fertilizer on the leaves, especially on continuous rainy days. Topdressing can complement the needs of plant growth and development, combined with spraying adding 0.5% urea, 0.3% potassium dihydrogen phosphate and various nutrients such as rich potassium, love over and so on.
3. Low-temperature period: After entering mid-October, the outside air temperature gradually decreases, gradually reducing the amount of air release. Increase the temperature as much as possible, and maintain at around 25°C during the day; maintain it at about 15°C during the night, and if it is lower than 13°C, leave no air at night. The last time the fertilizer is poured before October 15, the cultivator will be ploughed in time. The cultivator can keep the soil clean, increase the temperature of the ground temperature, increase the oxygen content of the soil, cut off the old roots of the surface, and reduce the nutrient consumption. This stage must pay special attention to the invasion of the first frost and the cold current. The main work of this stage is to repair the shed film, press the bottom tuyere, clean the shed film. Timely buckle the skirts on both sides and cover the grass around the shed at night.
China Extract Powder For Use As Dietary Supplement Extract Powder, Extract Powder Manufacturer
Shaanxi Kang New Pharmaceutical co., Ltd. , https://www.apipepdites.com