Winter Wheat Early Spring Management Technology

1. Due to seedlings, scientific fertilizer. After unfrozen winter wheat fields, after the soil is thawed, it is necessary to pay close attention to the time for irrigation. The water-filled mu will be applied with 20-30 kg of ammonium bicarbonate or urea at 5-10 kg, supplement the nutrition, and increase the tillage percentage of the tillers. Watering should be controlled first before pouring sand, after pouring silt; first pouring strong seedlings, after pouring weak seedlings; close attention to the weather forecast, select sunny weather, pouring, strong cold waves will not come pouring; timely scratch after pouring, remove the compaction.

2. Seize the opportunity to prevent and treat diseases. After mid-February wheat return to green, mu with 12.5% ​​licorice WP 20-30 grams or 15% Triadimefon 50-75 grams water 50-75 kilograms, spray evenly on the base of the stem to prevent wheat withered disease.

In the middle and mid-March, the field of underground pests occurred, and 40% of methylisothiphos EC was used to irrigate the roots in the hazard area. The area for prevention and treatment should be appropriately expanded.

3. Reasonable control, increase resistance to collapse. For wheat fields with a population greater than 600,000 heads, timely control can be performed during the period of wheat's rise, which can control over-prosperous growth of plants, promote down-rooting of roots, prevent lodging at late growth stage, and increase the ability of wheat to resist cold. The method is to use 30 grams of 15% paclobutrazol per mu in early March and spray 25-30 kg of water on the leaf surface. Spraying must be done carefully to avoid spraying or heavy spraying.

4. Timely and early, scientific addition. Prevent weeds to seize an "early" character, severe grass damage, can be used to cover a wide 1.8 grams of 30 kg of water evenly spray, so that no heavy spray, no leakage spray. In order to prevent the occurrence of phytotoxicity on crops under the locust crops, the application time must be controlled before March 5. The use of 2.4D-butyl ester herbicides is not recommended in spring.

5. Take measures and apply it to prevent freezing damage. After the jointing of wheat, the resistance to low temperature decreased significantly, and in early spring there were more cold currents. Wheat often suffered from different degrees of late frost damage. Therefore, we should actively pay attention to weather changes, pay attention to late frost forecast, timely watering before the advent of the cold current, adjust the near-surface microclimate, and prevent early spring frost damage; after wheat is frozen in the early spring, apply nitrogen fertilizer immediately after combining with watering. The early spring suppression of wheat fields with prosperous growth, spraying paclobutrazol and other chemical control agents to prevent prosperous growth and effectively prevent freezing damage.

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