The occurrence and defense of dry hot wind in wheat
2020-11-21 14:17:38
Dry hot air refers to the atmospheric drought formed in the late stage of wheat growth, in the stage of filling and milk ripening, with high temperature and low humidity plus strong wind (temperature higher than 30°C, humidity less than 30%, wind speed greater than 3m/s).
First, the symptoms of dry hot wind hazards After wheat is damaged, the stems and leaves appear gray gray, dry wheat ears, the grain is not full, a thousand grain weight drop, resulting in reduced production, quality is also reduced. The damage of dry hot air to wheat is not only related to the intensity and duration of dry hot wind, but also related to the growth period of wheat. If the dry hot wind occurs during the second half of the milk season until the ripening period, the damage is heavy and it occurs after the mid wax ripening period. The grouting is basically completed and the hazard is lighter.
Second, dry hot wind defense
1. Use early maturing varieties, timely sowing early, and promote seedling early precocity, avoiding the danger of dry hot wind.
2. Select strong resistance varieties to enhance the ability of wheat itself to resist dry hot air.
3. Increase the application of organic fertilizers and phosphate fertilizers, control soil loosening at seedling stage, promote root barrows, and improve the resilience in the later period.
4. Get up to the booting stage spray 0.2% - 0.4% potassium dihydrogen phosphate solution to promote grouting.
5. During the middle and late stages of grouting, watering is performed. In the stage of wheat filling, according to the soil moisture content, grouting is carried out in a timely manner and the mash yellow water is poured. On the one hand, irrigation increases soil moisture on the one hand, which satisfies the demand of wheat for water and maintains the water balance in the plant. On the other hand, it increases soil evaporation and transpiration of plants, increases air humidity, lowers air temperature, eases temperature fluctuations, and improves the microclimate in the field. According to the weather conditions, soil moisture content, and wheat growth, the later irrigation should be timely and appropriate. The late-maturing wheat field must be properly poured and must be kept away from strong wind when watering.
6. Conditional areas can create protective forests, regulate air temperature, reduce evaporation, and improve the microclimate of farmland.
First, the symptoms of dry hot wind hazards After wheat is damaged, the stems and leaves appear gray gray, dry wheat ears, the grain is not full, a thousand grain weight drop, resulting in reduced production, quality is also reduced. The damage of dry hot air to wheat is not only related to the intensity and duration of dry hot wind, but also related to the growth period of wheat. If the dry hot wind occurs during the second half of the milk season until the ripening period, the damage is heavy and it occurs after the mid wax ripening period. The grouting is basically completed and the hazard is lighter.
Second, dry hot wind defense
1. Use early maturing varieties, timely sowing early, and promote seedling early precocity, avoiding the danger of dry hot wind.
2. Select strong resistance varieties to enhance the ability of wheat itself to resist dry hot air.
3. Increase the application of organic fertilizers and phosphate fertilizers, control soil loosening at seedling stage, promote root barrows, and improve the resilience in the later period.
4. Get up to the booting stage spray 0.2% - 0.4% potassium dihydrogen phosphate solution to promote grouting.
5. During the middle and late stages of grouting, watering is performed. In the stage of wheat filling, according to the soil moisture content, grouting is carried out in a timely manner and the mash yellow water is poured. On the one hand, irrigation increases soil moisture on the one hand, which satisfies the demand of wheat for water and maintains the water balance in the plant. On the other hand, it increases soil evaporation and transpiration of plants, increases air humidity, lowers air temperature, eases temperature fluctuations, and improves the microclimate in the field. According to the weather conditions, soil moisture content, and wheat growth, the later irrigation should be timely and appropriate. The late-maturing wheat field must be properly poured and must be kept away from strong wind when watering.
6. Conditional areas can create protective forests, regulate air temperature, reduce evaporation, and improve the microclimate of farmland.
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