This week, the weather conditions of winter wheat in north China are better, and most of the south China continue to be rainy

This week the north DongMai District winter weather conditions is better Most continuous rainy southern oligonucleotides according to the future more than ten days Midwest YinYuXue weather Most of the farmland south wet stained against one, this week the weather characteristics and the impact analysis of agriculture 1.1 this week the weather characteristics, this week in most parts of northeast China, north China, huanghuai temperatures close to 1 ~ 4 ℃ all the year round in the same period or on the high side,In the rest of the country, the temperature was 1-4 ℃ lower in most of the agricultural areas, and 4-6 ℃ lower in the western part of The South Of the Yangtze River, the western part of south China and some parts of the southeast of southwest China (Figure 1).In jianghuai, southern Jianghan, Southern Jiangnan, Southern China and eastern Southwest China, the number of precipitation days is 4 to 7, and the precipitation is generally 10 to 50 mm. In the middle and eastern parts of Jiangnan and northern Parts of South China, the precipitation is 50 to 100 mm. In most other parts of China, the precipitation is less than 10 mm or no precipitation (Figure 2).Sunshine duration is normal or slightly less in most parts of north China, including the eastern part of northwest China, central Shanxi Province and central and southern Henan Province.The sunshine duration in most parts of south China is significantly less, among which the sunshine duration in the middle and lower reaches of the Yangtze River and most areas to the south of the Yangtze River is 5-90% less, but the sunshine duration in the central and western parts of southwest China is almost close to the regular year (Figure 3).Figure 1 national average temperature anomaly in figure 2 the national sun analyzed the percentage of precipitation in figure 3 is 1.2 this week weather analysis on the influence on agricultural production this week, the north DongMai District most heat condition is good, the soil moisture is appropriate, the northwest eastern and southern huanghuai drop small to moderate snow, local snow, conducive to farmland quantity and winter winter wheat security;However, snowfall weather in some areas leads to insufficient sunlight, less heat storage and slow growth of fruits and vegetables in greenhouse, which is not conducive to the formation of yield and quality improvement.Most of the southern part of the continuous low temperature cloudy and snow weather, heat and sunshine are obviously insufficient, precipitation is too much, part of the farmland continued to be too wet, continued low temperature and lack of light on winter wheat, rape growth adverse, slow growth, part of the low-lying farmland suffered from mild wet damage, vegetable growth is weak.During the week, some areas such as Jiangnan facility agriculture suffered snow disaster, local simple greenhouse facilities collapsed under pressure.It is expected that in the next 10 days, the cold air process affecting China will continue to be frequent, and the central and eastern regions will have more rainy and snowy weather. The precipitation in northern Xinjiang, southern Northeast China, eastern Northwest China and North China will be significantly more than that in the same period of the previous year.The average temperature in most areas of China is 1-4 ℃ lower than the same period of the previous year. From 18th to 20th, most areas in the north of the Yangtze River will see a drop of 4-6 ℃ and a local drop of more than 8℃, accompanied by a northward wind of 4-6 force.Snowfall is beneficial to increase soil moisture and heat preservation in winter wheat area in north China.However, the weather of strong wind, cooling and snowfall is unfavorable to animal husbandry and facility agriculture production. The heavy snowfall intensity in northern and northeastern parts of Xinjiang may lead to snow disaster, and the low temperature will increase the cost of thermal insulation and cold prevention for facility agriculture.In most parts of the south is still much cold wet weather, rainfall is significant, the jiangnan, guangdong, guangxi and guizhou province of middle eastern rainfall has 30 ~ 50 mm, parts of 70 ~ 90 mm, continuous low temperature wet oligonucleotides according to rapeseed, winter wheat and outdoor vegetable such as robust growth and soil partial wet from crop root growth,Some low-lying farmland is prone to wet damage.However, the precipitation process in south China is beneficial to soil water supplement and reservoir water storage in South China and Southwest China where local winter drought occurred earlier, and to the growth of dryland crops such as potatoes and vegetables and mountain fruit trees and tea trees lacking irrigation conditions (FIG. 4).It is suggested to strengthen and keep warm the facilities and livestock sheds in northern and northeastern Xinjiang to prevent the adverse effects of wind, temperature and snow.The winter wheat area in north China should manage the winter wheat field according to the seedling situation, and apply more farm fertilizer to the late weak seedling to ensure the winter wheat safety.Field management should be strengthened in winter wheat and rape producing areas in south China. In areas where the soil is too wet, soil moisture should be adjusted in time to guard against soil moisture damage and ensure robust crop growth.South China should pay attention to weather changes, as soon as possible to do spring ploughing spring sowing preparation.Table 1 Statistics on the development of winter wheat in major provinces this week Table 2 Statistics on the development of rapeseed in major provinces this week Appendix 2 Soil moisture monitoring Chart 1 20 cm soil relative humidity Chart 2Statistics of 20cm soil moisture content in all provinces in The agricultural region on February 13, 2022 (percentage of sites)

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