At present, the wheat in Linfen City has entered the jointing stage, which is a key period for grain formation and determining yield. It is of great significance to grasp the middle and late management for increasing grain and gaining weight to win the wheat harvest. At present, the wheat is growing well and the rainfall is good at the right time, which lays a good foundation for the high yield of wheat. According to the requirements of the national food security strategy, in order to ensure the high yield and high yield of wheat, the management of the middle and later stages should be based on the number of ears preserved, the number of grains increased, and the weight of attacked grains. According to the time classification guidance, scientifically plan the fertilizer water and improve the comprehensive production capacity of wheat. 1. Scientific fertilizer and water management according to the growth of seedlings One is the joint attack of fat and water. The jointing period is an important period in the whole growth and development of wheat. At this stage, the wheat tillers rapidly differentiated into two polars, the ineffective tillers stopped growing, and gradually died of yellowing; the effective tiller growth accelerated the formation of yield, and the required nutrients and moisture increased rapidly. The number of panicles and grains developed in a balanced manner. For the first and second types of seedlings that have not been fertilized in the early stage, apply 10-15 kg of urea combined with watering acres; for the three types of seedlings that have not been fertilized earlier, combine the application of 5-7.5 kg of urea combined with watering acres; dry wheat fields should be seized After the rain, take advantage of topdressing 5-7.5 kg of fertilizer. You can also choose to spray plant growth regulators or foliar fertilizers to reduce foliar transpiration and promote more spikes and large spikes. 2. Strengthen forecast and forecast, timely prevent diseases and insect pests In the middle and late stages of wheat growth, all areas should be closely monitored to prevent and control pests and diseases such as powdery mildew, rust, scab, red spider, ear aphid, and midge, select the right medicine, ensure safe medication, prevent and cure early, Unify and rule, avoid or reduce losses. One is disease prevention. Diseases mainly include rust, powdery mildew, and scab. For the prevention and control of wheat stripe rust and powdery mildew, you can use sprays such as triadimefon, tebuconazole, tebuconazole, etc .; scab is the main prevention, wheat heading and flowering period, if the weather forecast has more than 3 days of continuous rainy weather, Use thiophanate-methyl, carbendazim and other pharmaceutical sprays for prevention and control. If there is rain 24 hours after spraying, you should make up for spray prevention in time. The second is pest control. Insect pests mainly include red spiders, suckers and aphids. Wheat field spider mite, use avermectin, pyridaben and other spray control; wheat aphids, imidacloprid, lambda cypermethrin and other spray control; wheat midge, pupa stage can use 3% methyl isoflurane or phoxim granules per mu 3 kg, 25 kg mixed with fine soil, evenly spread on the ground, watered in time after sprinkling. Chlorpyrifos or lambda cypermethrin can be used for complete spray control during the adult stage. 3. Do a good job of "one spray and three prevention" in the later period The grain filling period is the final formation period of wheat grain yield. Nearly two thirds of wheat yield comes from the accumulation of photosynthetic products during the grain filling period. From this period to the maturity stage, root preservation, leaf protection, premature aging prevention, grain weight increase, and prevention of drought, waterlogging, The critical period of natural disasters such as wind, diseases, pests and lodging. Therefore, it is necessary to do a good job of "one spray and three prevention", mixing insecticides, fungicides, plant growth regulators (such as micro-fertilizers, drought-resistance agents, etc.), one-time application can achieve the prevention of diseases and insect pests, dry hot air, and Lodging, prolong the filling time, increase the filling rate, and promote the accumulation of photosynthetic products and increase the grain weight. It is recommended to choose high-efficiency, low-toxic and safe fungicides and insecticides. When spraying chemical agents, the safety interval of pesticides should be considered, and the time of the last application should be reasonably arranged to prevent pesticide residues. Disclaimer: Some articles of this website are transferred from the Internet. If the legal rights of third parties are involved, please inform this website for processing. phone
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The second is to increase the number of grains during flowering and flowering. The heading and flowering period of wheat is a symbol of the complete transformation of wheat from vegetative growth to reproductive growth. It is the second peak period of wheat absorption. It is also a key period that determines the number of grains of wheat ears. To get enough grains. For the de-fertilized and yellowed wheat field, combined with watering, apply about 7 kg of urea per acre. During this period of watering, attention should be paid to weather changes. Watering in windy and rainy weather is strictly prohibited to prevent lodging.