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Agricultural weather forecast
In the next 10 days, cold air activities will be frequent, and most of the northern winter wheat areas will have no obvious precipitation.
North China, Huang-Huai need good winter water pouring in due course to ensure the safety of winter wheat
1. Since mid-November, most of the northern winter wheat areas have been suitable for public opinion, and soil surface deviations in parts of North China Huanghuai and other places have been
Most of the winter wheat in the north is in the tillering stage, and winter wheat in some parts of Xinjiang, eastern Qinghai, Gansu, Ningxia and Shanxi enters the wintering period; most of the winter wheat in the Jianghuai, Jianghan and Southwest regions is in the stage of seedling growth. Since mid-November, most of the winter wheat area in the country has a temperature of 1 to 4 °C, and the precipitation is below 10 mm. The photothermal conditions are good, and the soil moisture is suitable, which is beneficial to the increase of effective tillering and winter wheat seedling growth in winter wheat in the north.
However, the relative humidity of 10 cm soil in most parts of Shanxi, southern Hebei, northwestern Henan, and southern Shandong is below 60%. The deviation of the surface is slightly unfavorable for the rooting of winter wheat and the formation of strong seedlings before winter; the northern part of Anhui and the northern part of Jiangsu The drought in the area is heavier, and the sowing and emergence of winter wheat is affected. Some of the fields have a phenomenon of uneven emergence or small seedlings and weak seedlings.
Second, the cold air activity will be frequent in the next 10 days, and there is no obvious precipitation in most of the northern winter wheat area
In the next 10 days, there is no obvious precipitation in most of the northern winter wheat areas (Fig. 1), and the temperature is close to the same period of the year; three cold air processes have affected the northern part of China from west to east, respectively, appearing on 23-25 ​​days (medium-strong) 26 to 27 days (medium intensity), 28 to 30 days (medium weak).
From 24 to 25, the cooling rate in Shanxi, Hebei, Beijing and Tianjin, most of Shandong, and northwestern Henan is 5-9 °C, and the lowest temperature can reach -10 to 0 °C. Around the 27th, the temperature of most of the winter wheat area was 3-7 °C, and the lowest temperature in Shanxi, Hebei North and Central, Beijing-Tianjin, and Northeast Shandong was below 0 °C. The lowest temperature below 28 °C on the 28th to 30th will appear in Shanxi and northern Hebei.
Figure 1 The next 10 days of national precipitation forecast
Third, agricultural production recommendations
1. The northern winter wheat has gradually entered the stage of cold resistance exercise, and the wintering period is approaching. In the next 10 days, the minimum temperature in Shanxi, Hebei, Beijing and Tianjin, Shandong, western Henan and northern China will be 3 to 5 days below the minimum temperature. These areas should strengthen field management according to soil moisture and seedlings before the arrival of cold air. Pour the winter water at the right time, prevent freezing and keep warm, and ensure that the wheat is safe for winter.
2. Fields with drought conditions in northern Anhui and northern Jiangsu should be timely irrigated, timely slashed, ventilated and protected, promote the growth of winter wheat roots, and strive to form strong seedlings before winter.
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