It is expected that in the next 10 days, the intensity of cold air affecting China will be strong, and the scope of impact will be large. The temperature in the northern region will vary greatly. The average temperature in northern and northeastern China is close to normal, and some regions are about 1 °C lower. The winter wheat is susceptible to freezing damage; the temperature in most of China is close to normal or about 1 °C, which is conducive to the growth of crops and facilities, but some winter wheat is prone to prolonged growth. Around the 7th, the first frost in the Jianghuai, the lower reaches of the Han River, the south of the Yangtze River and the eastern part of Guizhou will be unfavorable for the transplanting of rapeseed in the Yangtze River basin and the growth of winter wheat before winter. In the next 10 days, there will be more precipitation in northern Xinjiang, northeastern Inner Mongolia, and northeastern China. There will be heavy snow or heavy snow in the local area, which is not conducive to animal husbandry and facility agricultural production. Most areas in the northwestern part of China, North China, Huanghuai and Jianghuai still have no obvious precipitation process, and drought conditions will continue or develop in some areas, which is unfavorable for winter wheat and rapeseed growth. Precipitation in the southwestern part of the southwest, south-central Jiangnan, and southern China is more than normal, which is conducive to the storage of water in Kutang and the easing of drought in Guangxi. Therefore it is recommended that: 1. The winter wheat in the north has entered the wintering period. It is necessary to strengthen the field management according to the lyrics and seedlings, and pour the winter water before the cold air comes, prevent freezing and keeping warm, and ensure the wheat is safe for winter. For weak seedlings, appropriate measures such as fertilization, cover soil, and suppression should be taken to improve the ability of wheat to resist cold and freeze, and to avoid freezing damage. 2. The southern winter wheat area should continue to manage the field water and fertilizer and promote the increase of effective tillers. Appropriate fertilization should be applied to the weak winter wheat to promote the transformation of the seedlings to prevent freezing damage. Fields that are heavier along the Huai-Huai-Hebei drought should be timely watered, and the fields lacking seedlings and ridges should be replanted in time, seedlings and seedlings should be inspected, and the seedlings should be overwintered. For wheat with a prosperous trend, measures should be taken as early as possible to control the long-term and prevent freezing damage. According to the seedling condition, the rapeseed production area in the Yangtze River Basin should be fertilized in an appropriate amount to promote the formation of strong seedlings in rapeseed. During the cooling period, measures such as fumigation, covering and spraying chemicals should be adopted according to local conditions to prevent freezing damage. 3. In the south of China, it is necessary to actively carry out field management work for autumn and winter crops. For the autumn and winter crops that have been planted, field management such as cultivating, weeding and fertilizing should be done in time to promote the robust growth of crops. At the same time pay attention to water storage to ensure the normal growth of wintering crops. 4. Strengthen the management of facility agriculture. The greenhouse vegetables should pay attention to strengthening the shed membrane to prevent the damage caused by strong winds, and at the same time take insulation measures to prevent the occurrence of low temperature freezing damage. The northern pastoral area should do a good job in the prevention of snow disasters, and at the same time prepare forage materials to prevent livestock from dying.
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Prospects and Suggestions for Agricultural Meteorological Conditions in Early December
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