At present, winter wheat in the northern part of Huaibei has entered the wintering period and basically stopped growing. In other areas, wheat is still growing slowly. Southern rapeseed is in a slow growth phase in winter.
The drought in the north and south of Huaihuai area continues to develop in autumn and winter, and the cold weather is frequent, which poses a certain threat to the growth of wheat. However, since most areas are effectively irrigated before winter, the current drought in the north is limited to the surface layer of soil (0~10cm). The soil moisture below 10cm can basically meet the water demand of wheat growth, and after several cold weather tests, winter wheat has more Strong cold resistance, no large-scale dead seedlings, lack of seedlings. However, some of the fields are affected by factors such as less precipitation, sowing time, sowing method, and soil preparation quality. The growth of seedlings is uneven, and the ability to resist drought and cold is weak. Wheat has weak seedlings, small tillers, and leaf tips. Yellowing and other phenomena. In the high-lying areas with weak irrigation capacity in the northern dryland, the wheat tillering section is in the dry soil layer for a long time, forming a dry and frozen, and there is a dead seedling phenomenon. In the early morning of the 12th, the lowest temperature below -3 °C occurred in the south of the Huaihe River. Most of the areas reached the freezing temperature index of rapeseed (below -5 °C), the rape caused mild frost damage, and the freezing damage in local dry areas increased.
According to the forecast of the Anhui Meteorological Observatory in mid-January, there will be a more obvious snowfall process around the 17th. The amount of precipitation in the first period is less in the province, and the average temperature in the past is lower in the province.
Due to the continuous drought in Huaibei area, coupled with the recent cold air frequency, low extreme temperature and low temperature, all localities should take active measures to prevent double disasters caused by drought and freezing damage to local crops.
1. Grasp the winter irrigation: The most effective measure to alleviate the drought and reduce the freezing damage of wheat is winter irrigation. In order to avoid severe freezing after irrigation, the wheat along the Huaihuai River should be watered at noon on a sunny day with cold head warming.
2, timely topdressing: for some base fertilizer application, deep sowing, weak seedlings, small seedling age wheat field, combined with winter irrigation to supplement nitrogen fertilizer, to promote growth with fertilizer water.
3, repression and filming wheat can be broken soil, for the rotation of the false wheat field, we must take measures such as suppression, to stabilize the soil, to ensure warmth, to prevent freezing.
4. For the prevention and control of rapeseed, the frozen sorghum and some frozen leaves should be removed in time, and the quick-acting fertilizer should be added.
5. Pay close attention to weather changes and weather forecasts, and take active measures to prevent freezing damage before cold air comes.
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