Although the temperature gradually increased after the spring, the temperature at night was still low, and the temperature suitable for wheat growth was not yet reached. It was only after the plentiful ploughing and the cultivating of loose soil was completed that the water could be poured back to Qingshui. My county's spring climate is characterized by windy and rainy conditions, and the spring and late winter is frequent. Early spring watering can easily lead to large cooling in the fields, which is unfavorable to the growth of wheat after returning green. Severe people also suffer from cold injury due to the advent of cold air, so do not blindly return to Qingshui. . Returning to green and fertilized water should be scientific, reasonable, and appropriate. If fertilizer and water will cause spring wheat to produce excessive infertile labor, the population will be too large, one will cause nutrient waste, and the second one will lay hidden dangers for later lodging and pest damage. Spring wheat pouring back to Qingshui should pay attention to the following questions:
First, the time for pouring back to Qingshui should be determined based on soil moisture. Any wheat field with severe arable land loss, poor field quality, and severe field deficiencies before winter, wheat fields with poor individual development, small groups, and severe drought conditions should be poured back to Qingshui in time, and the time for returning to Qingshui should be average daily temperature. Only when it reaches 3°C or more. Generally speaking, as long as the lyrics allow, the general wheat field should delay or not return to Qingshui and delay the return of Qingshui to the beginning or the jointing period. For wheat fields with small groups, poor growth potential or long winter and weak spring conditions, it can be combined with watered Mu. 10 kg of urea, after watering, when the wheat field is suitable, it is timely to plan and protect the earth.
Second, pouring back to Qingshui should strictly control the amount of water. Due to the early spring day and night temperature changes combined with the frequent changes in the cold and warm air flow, watering the amount of water to the appropriate, not flood irrigation, to prevent the occurrence of cold currents and ground temperature is too low to cause freezing damage to wheat.
Third, pouring back to Qingshui but also according to the seedlings may be. For the wheat field sown before the winter, due to lack of fertility caused by fewer tillers, the number of spikes is not enough (about 500,000 total stems per acre before winter) can be poured back to Qingshui, combined with watering urea 7.5 ~ 10 kg per acre , 5 ~ 7.5 kg of potassium sulfate or potassium chloride, in order to promote the delivery of early spring wheat, as much as possible to fight for more spikes, lay the foundation for high yield; late sowing and the total number of stems from 70 to 900,000 strong seedlings or 90 More than 10,000 Wangwang Miao Miao Fei Shui is generally not poured back to Qingshui, to cultivator loose soil, heat preservation of preserving the main spring pressure to the minimum; raw wheat growing before the winter because of the large amount of fertilizer before the growth of fertilizer and water, and Without irrigation in the winter, the field is poorly plucked. In the early spring, it is easy to cause dead seedlings when it is cold and cold, and it is also necessary to pay attention to pouring green water in time.
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