Recently, the Anhui Provincial Agricultural Committee held an expert meeting to analyze wheat seedlings, formulate technical opinions on wheat current and early spring field management, and proposed to control the anti-freezing, comprehensive control of pests and diseases, scientific pursuit of joint fertilizer, rice and wheat Focusing on the growth of desiccation and root growth, the early spring wheat field tube was carried out.
Taking measures to control the prosperous period is conducive to preventing wheat from freezing early in spring and reducing late lodging. It can be controlled by means of suppression, chemical control, and cultivating. The suppression is carried out around noon on sunny days. The spraying chemical control agent for wheat should be sprayed with a chemical regulator before 10:00 to 4:00 pm when the temperature rises to above the daily average temperature of 5 °C. For the large group of Wangchangtian blocks, deep roots and roots can be cut, and the gaps in temperature rise can be used after the wheat is greened, and the soil is frozen in time after noon soil freezing.
Experts stressed that chemical weeding in spring should be sooner rather than later. When the daily temperature rises above 5 °C, it can be started. It should be used strictly according to the recommended dosage to prevent phytotoxicity and be completed before the jointing. Rice buckwheat should be high-yield, and it is the key to open the "three ditch" to reduce humidity and prevent disease. In order to combine the early spring management to clear the "three ditch" in the field, especially to deepen the head ditch, open the field ditch, to achieve dry irrigation, can discharge, and quickly reduce the groundwater level to ensure the healthy growth of wheat. For the field where the planting is late and the potential is poor, the greening of the rain, snow and snow, 8-10 kg of compound fertilizer per acre or 3 to 5 kg of urea, which is weak and strong, is conducive to the balanced growth of wheat. This year, the wheat population is too large, and the field is closed, which is conducive to the damage of pests such as wheat sheath blight. It is necessary to focus on the prevention and control of sheath blight, and to treat diseases and insect pests such as aphids and red spiders.
Applying jointing fertilizer is the most effective measure to ensure the rate of ear formation, to achieve strong stalks and large ears, and to increase the number of grains per ear. Since the wheat population is generally too large this year and the seedlings are weak, in the topdressing fertilizer, the application amount of phosphorus and potassium fertilizer should be increased to enhance the plant's resistance to stress. Generally, it is suitable to apply 20 kg of ternary compound fertilizer and 5 kg of urea per mu. The three types of seedling blocks that are used to return to the green fertilizer should reduce the number of topping fertilizers and delay the topdressing time. High-yield creation of field plots should also be followed by the application of flower fertilizers, and strive for more large-scale grains, laying the foundation for achieving production targets. The low temperature of -5 °C ~ -8 °C before the jointing stage of wheat, and the low temperature of about 0 °C after jointing are likely to cause freezing damage. Before the arrival of the cold current, the dry wheat fields should be timely watered to ensure sufficient moisture and reduce the danger of cold damage.
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