After heading wheat, the growth of roots, leaves and stems basically stopped. After heading and flowering, the growth center gradually transferred to the grain, which is an important period to determine the weight and quality of the grain. How to raise the root and protect the leaves, and extend the late root and leaf functional period is the key to improving grain quality and quality. To this end, we must do a good job of drought prevention, flood control, disease prevention, insects, and other work.
1. Drought prevention. Huaibei is located in the transition zone between North and South. During the period from heading to maturity, the weather is variable. When it is dry, it often appears dry and hot winds. The amount of water required during flowering and filling of wheat is also higher. After drought, it needs to be watered in a timely manner. The soil is moist to support the roots, enhance the ability to resist dry heat, and ensure smooth grouting. The late wheat plant is tall, so it is appropriate to use light water when it is not windy, and it is advisable to water it 5 to 7 days before the dry hot air appears. When the dry hot air appears, it should be suspended. After the wind passes, it should be watered to avoid causing lodging.
2, prevent waterlogging. "Spring rain rotten wheat root." There are more spring rains in Jianghuai, Yanjiang and Jiangnan regions, which is a limiting factor in the low wheat output of this region. Carefully clean up the drainage ditch and dredge the channels so that the ditch can communicate with each other to speed up the drainage speed, reduce the groundwater level, and enhance the permeability of the soil, creating a good environmental condition for the healthy growth of wheat.
3, pest prevention. Many diseases and insect pests often occur in the late growth period of wheat. Due to the high temperatures in winter and spring and the low winter mortality rate, it is predicted that the major crop diseases and insect pests in the country will show a moderately heavy ecological potential this year, especially for insect pests. Wheat diseases and pests will be strip rust, sheath blight, wheat bran, wheat spiders. Strengthen forecasting, prepare enough medicines, and adopt effective prevention and control measures as soon as possible to minimize the loss of pests and diseases.
4, anti-removal fertilizer. After heading wheat, the roots enter the aging stage, absorption capacity weakens, the rhizosphere fertilization utilization rate is very low, and at the same time some nutrients are often in short supply, the top dressing is performed outside the roots to extend the leaf functional period and prevent premature aging. As the seedlings are suitable, spraying the appropriate concentration of urea or potassium dihydrogen phosphate solution can prevent defertilization, increase grain weight, improve quality, and also have a certain effect on preventing dry hot wind.
5, anti-frost. "Clear snow, Gu Yu broken frost." After the jointing of the wheat, the resistance to low temperature decreased significantly. When it hit the cold air in the north, it would suffer different degrees of freezing damage. Pre-frost irrigation and smoke-freezing are measures to reduce frost damage. They can be used flexibly according to conditions.
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