Early-late rice heat damage

Early-late rice heat damage

1, increase fertilization material: in the last one leaf when the full exhibition of urea 1-2.5 kg per kg or 8-10 Dan ash, urea, superphosphate, etc. can be used to leaf the water in the ear to heading. Spraying.

2, field irrigation temperature: high temperature season, irrigation can improve the field microclimate. After deep-water irrigation at high temperature, daily irrigation at night, good growing fields, can be watered before 11 o'clock in the morning, to 2 o'clock in the afternoon, adjust the temperature in high temperature period before and after noon. In addition, spray 200-250 kg of clear water per acre before and after noon, if necessary, to reduce the temperature by 1-2°C, increase the humidity by 10-15%, and maintain the temperature for 1-2 hours.

3, sprinkler irrigation: conditions where high temperature should be sprinkler irrigation, can significantly reduce the temperature and humidity, spray irrigation once, the field temperature can drop more than 2 °C, relative humidity increased 10-20%, effective time can be maintained for 2 hours.

4, spray chemical agents: 100 grams per acre with zinc sulfate, or 100 grams of potassium dihydrogen phosphate spray 40-50 kilograms of water on the surface.

5, Tanabe set screen: For the early rice field in the windshield, in the flowering period meets hot and hot weather, wind barrier can be set up on the wind side of the wind field, along the ridge every 2-3 meters hit a stake, and then With a banner film or other substitutable material is fixed on the stake.

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