1. Scratch suppression and promote strong seedlings. Freezing and thawing the soil to loosen the surface soil is not conducive to the combination of root and soil and the absorption of water and fertilizer. Therefore, the soil should be repressed in the early spring after the soil is thawed to bridge the cracks and sink the soil, reduce the evaporation of soil moisture, and avoid sudden changes in temperature on wheat seedlings. The injury; repression 1 can inhibit the growth of rice shoots 5-7 days aboveground, and promote root growth, is conducive to Wang Miao turns strong. Prosperous wheat fields should be repressed 2-3 times in spring.
2. Properly delay spring watering time. Prosperous wheat is a large group of wheat before winter, so spring should control the continued occurrence of wheat tiller, accelerate the decline of high levels and form a robust population. For this reason, the watering time in spring should be postponed as appropriate, promote the polarization of wheat in childbirth, and achieve strong seedling growth.
3. To strengthen the integrated control of pests and weeds. Due to the fact that the accumulated temperature above 0°C before winter is higher than that of normal years, and the number of precipitation and precipitation are large, and the soil moisture content is high, a considerable part of the province does not perform pre-winter weed control. There are many types of weeds and the base number is large. In the pre-high temperature and high humidity environment, the occurrence of spring weeds and sheath blight is more likely to occur. Spring management should strengthen the integrated prevention and control of pests and weeds. The control of weeds should be based on weather, wheat seedlings, and weeds after chemical repelling, and weed control should be conducted to prevent weed disasters.
The main measures for prevention and control of wheat sheath blight are to reduce the humidity and canopy density in the field through cropping and weeding to reduce the occurrence of wheat sheath blight. Second, in early March and mid-March, 5% of the borer is selected. Su Shui agent 250 ml / acre or 20% Triadimefon EC 50-60 ml / mu, watered 50 to 100 kg, sprayed on the stem base of wheat, severe disease field interval 7-10 days before spraying once again.
4. Spring fertilizer management. Start jointing period, combined with watering 15-20 kg of urea per acre. In wheat fields that do not use phosphorus or potash as base fertilizer, 10 kg of urea and 15-20 kg of diammonium phosphate can be topdressed per mu.
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