The latest Prevention and Control measures of low temperature Frost injury of Chinese Cabbage
After Frosts Descent, the temperature dropped sharply, and for the early planting of autumn cabbage, it has now reached a period of continuous listing, while for the late planting of Chinese cabbage, it is necessary to do a good job in preventing low temperature and freezing injury, otherwise it is very likely to reduce production in a large area.
I. low temperature hazard
The low temperature of Chinese cabbage has two harms, one is the low temperature harm, which is also called chilling injury, which mainly occurs in the heading period of Chinese cabbage. When the temperature is lower than 10 degrees, the growth rate of Chinese cabbage will become very slow, and when it is less than 5 degrees, it will basically stop growing. In the north, the temperature drops faster than in the south, and it will usher in a cold snap ahead of time, which will cause a sharp drop in temperature, resulting in unsound cabbage, low yield and quality. Second, freezing injury, planting cabbage in the north, in the first half of the harvest, will suddenly encounter cold spell and snow weather, the temperature drops below 0 degrees, it is very easy to lead to the freezing injury of cabbage leaves, difficult to recover.
II. Prevention and control measures
1. Watering
After the attack of strong cold air, the weather is clear, there is no wind or breeze at night, and the air temperature drops rapidly, especially when the surface temperature is below 0 degrees, a large amount of well water can be irrigated to increase the ground temperature. make the surface temperature rise to about 8 degrees so as to avoid frost. Generally, North China is watered in the first and middle of November, Northeast and Northwest China in mid-late October, and the Yangtze River Basin from late November to early and mid-December.
2. Spray water
Before the occurrence of frost, you can use a sprayer to spray water on the surface of the plant, which can slow down the temperature of the plant, increase the content of water vapor in the atmosphere, and make the water vapor condense and release heat to ease the frost.
2. Spray cold-resistant agent
Can be used per mu of cold-resistant agent or anti-stress yield increasing agent 100ml, diluted with water, spraying plants, can also play a good cold resistance effect.
The above is the introduction of low temperature freezing injury prevention and control measures of Chinese cabbage. I hope it can help you. If you want to know more about it, please pay attention to us.
- Prev
The latest course on Seedling techniques and methods of Konjac Seeds
Konjac is a kind of underground root vegetable, which has a great market demand in our country. Now there are many ways to grow konjac, among which direct seeding and seedling transplanting are common. However, most of them are mainly seedling transplanting, because seedling transplanting is relative to direct seeding.
- Next
The latest storage method of konjac
Konjac is a popular vegetable in our country, and now with the passage of time, slowly to the end of autumn. The end of autumn is also just the harvest season of konjac, because the yield of konjac is relatively high. Therefore, some of the harvested konjac can not be processed and harvested in time
Related
- A course of planting techniques and methods on how to grow carrots
- How to plant the latest tulips?
- Is it better to pick tea in the morning or in the afternoon? When is the best time for tea to be picked? what is the third or fifth tea?
- Launch Yuanxiao Happy combination Haocha + Tea Yuan healthy Taste
- Penghu Tourism "Fireworks 20 Parade with You"
- 2022 West Lake Happiness holds "Digital Revitalization Voucher" and draws iphone13 and laptop.
- Banqiao Fuzhou social houses are designed to change start-up combined with police elimination to create a safe and livable environment
- The convenient measure of "mechanical weeding" in Xinbei has been abused and the Agriculture Bureau has imposed heavy penalties on the illegal land consolidation.
- Changgeng University Joins Hands with Four Memory Factories to Rescue Memory Talent Shortage
- The list of Taiwan's top 100 MVP managers is listed by the Director-General of the Farmers' Association of Sanxia District.