In order to promote the early growth of strong wheat seedlings and increase their root strength, current wheat seedling management should grasp the following technologies: First, repression 1. Three-leaf repression. After the three-leaf stage of wheat seedlings, they rely on their own photosynthesis to produce nutrients. At this time, there are few roots and few leaves in the wheat seedlings. It is necessary to strengthen management, promote rooting and delivery, and strengthen seedlings early. Therefore, in the wheat trifoliate period, using a light-pressing device to suppress it again can control the main stem, promote the tillering, and control the ground and promote the role of the underground root system. 2. Pre-winter seedling suppression. For cultivating seedlings for wheat cultivating, planting extensively, and returning the crops to the fields that are not practical, the wheat can be taken to crush the crushed rubbish, consolidate the soil, increase the temperature and protect the earthworms, control the stimuli, and accelerate the tillering. When repressing, it is necessary to pay attention to: (1) When pressing the wheat, use a small roller to suppress it, press it only once, and press it without pressure. (2) It is better to press wheat from 9am to 3pm in sunny weather. When wet, cloudy, or dew, do not press wheat. Second, promote the wheat field weeds "Autumn governance" In the case of 3-5 leaves of wheat, the weeds in the field have a positive 2-3 leaf stage. The young grasses are sensitive to pesticides, low in drug resistance, and effective in weed control. Select herbicides for wheat field to choose the right variety according to the type of weeds in the field, and grasp the application period. Autumn cure weeds best in late October to early November, the temperature above 10 °C, medication effect is good. We must also master the usage and dosage. For example, wheat is mainly gramineous weeds, and 10% of tribenuron-methyl can be used per mu with 50 ml of 72% 2,4-D butyl ester and 30 kg of water can be evenly sprayed. If the weeds in wheat fields are dominated by leeks, they should be treated with 10% tribenuron-methyl per gram, 10 grams of +56% dimethyl chlorinated tetrachloride, 30 kilograms of water, and even spraying throughout the field. Wheat field wild wheat, such as festival, wheat can be used 3% Shima or wide Shima oil suspension agent, 30 ml per acre medication agent, 30 kg of water evenly spray. When using, add 1/3 water in the sprayer first, then add the water after mixing the Shima medicine, add the auxiliary agent, and stir the whole field spray. Wild oats, aphrodisiacs, etc. can be controlled by drugs such as tigris, thrips, etc., and pesticides should be used according to the requirements of the pesticide instructions. The spraying time and the amount of liquid medicine in the mu should be the same as above. In addition, we must pay attention to wheat no longer spray herbicide after jointing to prevent phytotoxicity. Third, seedling spray fertilizer Spraying potassium dihydrogen phosphate foliar fertilizer (300-500 times liquid) and various trace elements in the seedling stage of wheat can control the length of the wheat seedlings, strengthen disease resistance, and promote the delivery before winter. According to the experiment, spraying 5 to 10 grams of "Rui Peilei" per acre during the seedling stage can be carried out in conjunction with autumnal weeding. Care should be taken not to re-spray or miss the spray. The best period for medication is from October 20 to November 15. Fourth, pest control at the seedling stage 1. It can use 10% imidacloprid 1000 times liquid after wheat seedlings, spraying 5-10 meters of medicine belt around the wheat field to prevent the migration of insects such as slugs and prevent virus diseases. 2. Spray the wheat field during the wheat tillering period. When 1 square meter is found with 5 soil lice or more than 10 scorpion sphaeroides, the 25% fast killing 1000 times solution or 10% imidacloprid wettable powder 1000 times solution can be sprayed evenly across the field to eliminate pests and prevent diseases effectively. The occurrence of wheat virus disease. V. Reasonably arrange frozen water 1. Pouring wheat frozen water in a timely and appropriate manner to ensure safe winter wheat. 2. The appropriate period of freezing water is "night freezing, consumption, freezing water is just right." That is, the average temperature starts at 7°C-8°C and ends at the average daily temperature of 5°C. The central and southern parts of the province are generally from the end of November to the beginning of December. 3. The amount of water to be poured shall prevail. It is advisable to seep the water on the day and avoid flooding. 4. Watering time. Choose from 9am to 3pm in sunny weather. 5. The soil water content is lower than the specified index to be poured with frozen water. Soil moisture content of sand land <12%; soil land <14%; clay land <16%. 6. Immediately after thawing the frozen water, the buckwheat is cut, the compaction is removed, and the ground cracks are prevented, and the weeding and protecting the seedlings can promote strong seedlings and promote the development of the root system. Dental Equipment & Supplies,Dental Equipment,Dental Supplies,High Speed Handpiece Gd-H501,Dental X-Ray Unit NOUVASANT GROUP LTD. , https://www.nouvasant.com