Anhui should strengthen the facilities to clean up the snow in time, and prevent the effects of low temperature rain and snow on the wheat
At present, winter wheat in the northern part of Huaibei has entered the wintering period and basically stopped growing. Winter wheat in other areas is still growing slowly. Because most of the areas along Huaihei River were effectively irrigated before winter, the adverse effects of drought on winter wheat were alleviated, and there was no large-scale dead seedlings and seedlings. However, the persistent drought still caused some winter wheat leaves to be thinner and weaker. The phenomenon of less tillering, especially in high-lying areas with weak irrigation capacity, winter wheat tillering is long in the dry soil layer, and there is a dead seedling phenomenon. Recently, winter wheat has undergone several cold-resistant exercises, and its ability to resist cold is strong. The robust wheat seedlings can withstand the low temperature below -12 °C. Most of the low temperature of about -10 °C will not cause dead seedlings, but the leaves and tips. It will turn yellow, and the partial late weak seedlings will cause death.
The rapeseed in the area south of the Huaihe River is currently in a slow growth stage during the seedling stage. In most areas before winter, the light and temperature waters are reasonable and the soil moisture is suitable, which is conducive to the growth of rapeseed seedlings. The rapeseed grows robustly and has strong cold resistance. However, the Jianghuai watershed area in the north of the Huaihe River is affected by the persistent drought, resulting in rapeseed seedlings. Small, weak, and poor in cold resistance. On January 12th and 16th, the extreme minimum temperature in most areas south of the Huaihe River was below -5°C, which reached the freezing injury index of rapeseed. The rapeseed showed different degrees of freezing damage, and the freezing damage was heavier in the poor seedling area.
According to the forecast of Anhui Meteorological Observatory, the low temperature rain and snow weather along the Huaihe River in the south of the Huaihe River will lift or alleviate the drought in the dry area and improve the soil moisture, which is conducive to the growth of wheat in the dry area. The snowfall can kill The death of some wintering eggs will play a certain role in prevention and control of the occurrence of diseases and insect pests in the coming year. At the same time, snow cover can reduce the degree of freezing damage to wheat vegetables.
However, in areas with large rainfall and snow in the south, it is easy to cause waterlogging on farmland and affect the growth of rapeseed roots; the deeper snow areas are likely to cause damage to agricultural facilities and collapse, so that the crops in the greenhouse are exposed to the outside. In addition, there is still no precipitation in the Huaibei area, and the drought will continue and develop, which is not conducive to the safe wintering of winter wheat.
In order to mitigate and avoid the effects of low temperature, rain, snow and drought on crops, the following recommendations are made:
1. The drought in Huaibei continues to develop. It is necessary to choose the cold tail to warm the water at noon on sunny days to avoid serious freezing after irrigation. At the same time, it is necessary to combine nitrogen irrigation with winter irrigation to promote growth with fertilizer.
2. The area south of the Huaihe River should be cleaned up in time to prevent the rain and snow from being too large, resulting in water accumulation in the farmland and affecting the growth of wheat roots.
3. It is necessary to reinforce the agricultural facilities and clean up the snow in time to prevent the snow from thickening and squeezing the greenhouse, which will affect the growth of crops in the greenhouse.
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