At present, the winter wheat planting is basically over and most of them are in the seedling stage. On the whole, there are better lyrics throughout the country, suitable sowing date, and good sowing quality. According to the meteorological department's forecast, this year's autumn and winter will be the strongest in El Nino for 17 years, and will continue into the next spring, showing that winter temperatures are high, precipitation in some areas is reduced, and winter and spring temperatures are highly volatile, which is unfavorable to winter wheat production. In response to abnormal climatic conditions, the National Agricultural Technology Extension Service Center and the Wheat Experts Group of the Ministry of Agriculture have studied and put forward the technical guidance for pre-winter field pipes, strengthened “drought resistance, control of prosperous, and antifreezeâ€, and grasped winter irrigation, repression, chemical control, and pest and weed control. Cultivating pre-winter strong seedlings to ensure safe wintering. Repression security, control of anti-wang In the right time before the winter repression, especially in wheat straw returned to the field and the emergence of cracks in the wheat field, can be practical soil, bridging gaps, reduce soil scab, is conducive to seedling growth, but also can control strong growth. Wheat seedling repression should pay attention to dry pressure not wet, soil surface moisture or dew when there is no suppression of the water; should use a smooth surface roller, should not use the corrugated type of roller, to prevent mechanical damage to the wheat seedlings. For wheat fields sown too early and the group too large and prosperous, spray growth inhibitors, control your growth, and keep your seedlings safe for the winter. Water temperature, defense cold wave For wheat fields with high temperatures, lack of cold-resistant wheat, and long-lived wheat fields, once they encounter cold weather, they are prone to freezing. It is necessary to pay close attention to the changes in the weather, timely watering before cooling down, improve the soil moisture content, regulate the microclimate near the ground floor, reduce the temperature change, and prevent cold waves and freezing damage. In the event of freezing injury, appropriate amounts of nitrogen fertilizer should be applied in a timely manner and then watered to promote the recovery of frozen wheat. Timely winter irrigation, drought protection seedlings In Huanghuai, northern and northwestern winter wheat areas, wheat fields lacking straw, straw returning, rotary tilling, and unreal wheat fields are flooded with winter water in a timely manner to ensure safe wintering. Winter irrigation time is generally selected to be stable when the daily average temperature is stable at 3°C ​​to 4°C, night freezing and thawing, and moisture can be infiltrated in a timely manner. Advocate water-saving irrigation, prohibit flood irrigation, timely scratching after irrigation, soil protection, to prevent surface cracking, to avoid the roots of dead seedlings. Pest control, chemical weed control Pay close attention to the occurrence of diseases and pests such as spider mites, ground tigers, and sheath blight, and timely make predictions and preventions. Basing on spring grass and autumn herbs, according to the grass phase, grass age, sensation and other appropriate use of chemicals, grasp the chemical weeding before winter. In the middle of November to early December in Huanghuaihai and northwestern China, wheat is in the 3- to 4-leaf stage and weed 2-leaf to 3-leaf stage; in the middle and lower reaches of the Yangtze River, the average daily temperature is above 5°C before the winter to grab sunny days. To ensure that the frost temperature below 0°C is not encountered within 7 days after treatment, in order to improve the elimination effect and avoid the occurrence of phytotoxicity. In addition, in northern wheat areas, livestock and poultry should be kept green to ensure normal growth and safe wintering of wheat seedlings; .
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