According to the monitoring and forecast of the Central Meteorological Observatory, it is estimated that from February 25 to 28, except for the precipitation in the eastern part of North China and northern Shandong, the precipitation will be 5 to 15 mm, and the southwestern part of Shaanxi, southwestern Shanxi and Henan The cumulative precipitation in parts of the Ministry of the Ministry, the central and northern parts of Susong, and the southern part of Shandong Province is 15 to 30 mm, and the rainfall in parts of southern Henan and northern Susong can reach 40 to 55 mm. From the 27th to the 28th, there will be rain-to-snow or sleet weather from north to south in central Shaanxi and southern China, Huanghuai and other places.
Compared with the two precipitation processes from February 9 to 10 and from 12 to 13, the precipitation process has the characteristics of long duration, wide coverage and large process precipitation.
Affected by the precipitation process, the drought in most dry areas will be significantly eased, the scope of drought will be reduced, and the degree will be reduced. However, the precipitation in the central and eastern parts of North China and northern Shandong is less than 5 mm, and the drought in southern Hebei and northern Shandong will continue. (Figure 4).
There will be strong winds and cool weather in the north. From February 28 to March 1, the temperature in the north of Huanghuai is below 0 °C.
From February 24th to March 1st, due to the influence of cold air, there will be strong winds and cool weather in most parts of the north, with a cooling range of 4 to 6 °C, some areas of 8 to 10 °C, and winds of 4 to 6. From February 25th to March 1st, the daily minimum temperature in the northwestern Shaanxi and Qinling areas, the central and southern parts of North China, and Huanghuai will gradually drop below 0°C. From the night of February 28 to March 1, the lowest temperature in the northeastern part of Gansu, northwestern Shaanxi, western North China and northern China can be reduced to minus 6 to minus 10 °C, and the lowest temperature in eastern North China is minus 4 to minus 6 °C. The lowest temperature in the northern part of Huaihe is minus 2 to minus 4 °C, the lowest temperature in the southern part of Huanghuai is 0 to minus 2 °C, and the lowest temperature in Huaihe is about 0 °C.
Make the following suggestions for this:
In the northern winter wheat and arid areas, we should pay close attention to the weather changes. The southern part of Hebei Province and the dry areas of northern Shandong still have to pick up the temperature, and irrigate in the warm and warm afternoon; and according to the condition of seedlings and fertility, combined with fertigation; if the average daily temperature drops to 3 Below °C, stop irrigation and ensure that there is no clear water overnight to prevent freezing damage to wheat. In other dry areas, due to significant precipitation from 25 to 28 days, areas with good moisture and good seedling conditions may be appropriately postponed to return to Qingshui.
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