Wheat seedling characteristics and countermeasures
Huinong School has formulated scientific and reasonable technical advice on wheat early spring management, and determined the flexible nitrogen fertilizer post-shifting technology. The watering and fertilizing time is appropriate in advance, the tillering rate is increased, and multiple measures are taken to prevent the cold spring management.
Second, the response measures
1. Due to the suitable conditions for seedlings, scientifically plan for fertilizer. The normal growth of the first and second types of wheat fields in the greening period is carried out using sputum to carry out the hoeing, loosening the soil, increasing the ground temperature, promoting root growth, promoting early seedling growth, watering and fertilizing to postpone the jointing stage, and combining the watering acres to apply urea 15 kg. Three types of wheat fields with small populations and weak growth, sandy soils and wheat fields with de-fertilization should be irrigated after wheat is greened. At the same time, 20-30 kg of ammonium or 5-10 kg of urea is added to the soil. Increase the tillering rate in spring and increase the rate of tillering into ear; after jointing, add 10 kg of urea in combination with watering, and then drain in time to remove the knot.
2. Increase anti-fall, rational control. For wheat fields with a population of more than 600,000, during the period of wheat emergence, timely control, control plant growth, promote root system, prevent lodging during late growth, and improve wheat cold resistance. The method is to use 30% paclobutrazol 30g in the first half of March, and foliar spray on 25-30 kg of water. When spraying, be sure not to leak or spray.
3. Seize the opportunity to prevent pests and diseases
(1) Prevention and treatment of sheath blight, total etch disease: After the wheat is returned to green in late February, the use of 12.5% ​​of the granules of wet granules is 20-30 g or 15% of the rust WP WP 50-75 g of water is 50-75 kg, The base of the stem is evenly sprayed to prevent wheat sheath blight. For the plots with total erosive disease, 150% of the rust-negative wettable powder of 150% is sprayed with 75-100 kg of water, and the base of the wheat stem is sprayed to reduce the late incidence of wheat.
(2) Prevention and control of underground pests: The field of underground pests will be treated with 40% methyl isoflavone emulsifiable concentrate 800 times in the hazard area, and the area of ​​prevention and control should be appropriately expanded.
4. Scientifically remediate weeds. To control weeds, we must seize the word "early", and use the broad-leaved weeds such as sage, amaranth, and rice stalks to grow a 75% benzenesulfuron-based dry suspension (trade name cover wide) 1 1.8 g; wheat field dominated by grassy weeds such as wild oats and buckwheat, with 60-70 ml of 6.9% hummer emulsion or 25-30 ml of 3% Shima emulsifiable concentrate for wheat field; For the serious occurrence of piglets, use 20% to make its augmentation oil 50-60 ml per acre; add 30-40 kg of water to spray the stem and leaf spray, and do not spray or spray when spraying.
5. Take multiple measures to prevent freezing damage. After wheat jointing, the resistance to low temperature is significantly reduced, and there are many cold currents in early spring. Wheat often suffers from different degrees of late frost damage. Therefore, the battalion actively pays attention to the weather changes, timely irrigation before the cold current, regulates the near-surface layer microclimate, and defends against early spring frost damage; if the wheat suffers from freezing damage in early spring, it immediately combines with watering to apply quick-acting nitrogen fertilizer; sprays potassium dihydrogen phosphate in the wheat-up period. Plant growth regulators such as Tianfengsu or Shuofeng 481 promote plant robust growth and improve cold resistance.
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