The soil moisture in most wheat fields in North China and Huanghuai winter wheat areas is suitable, and the seedling condition is a better year in recent years. The field management in spring should reasonably manage the water and fertilizer, promote the multiple grain weight of the ear and foot, and lay a good foundation for the high yield of wheat.
(1) Repression, planning, promotion, and promotion of seedlings to ensure long-term stability. Combine repression and squatting, and generally press squatting afterwards, so as to achieve the effect of Panasonic, lifting, protecting and warming. For the wheat fields with coarse soil preparation in the fall season, lotus soil and no water pouring conditions, timely repression in the early spring soil thawing to sink the soil, bridging the cracks, reducing water evaporation, and promoting root growth.
(B) to promote the combination of control, fertilizer and water operations, management of water poured wheat fields. Three kinds of seedlings to promote the main. The spring topdressing is carried out in two stages. The first time in the returning green period, the 5 cm ground temperature is stable at about 5°C, the top dressing is watered, and the mu application of urea is 5-7 kg and the appropriate amount of diammonium phosphate; the second time in the jointing stage, the spike is increased. Number of grains. The second type of seedlings promotes control and integration. The general level of soil fertility, the number of acres of 500,000 in the second type of wheat, in the early stage of the wheat together with watering mu recovery urea 10-15 kilograms; higher level of soil fertility, 600,000 acres of the second crop of wheat, in the middle of the wheat rise up the top dressing water. One type of seedling control promotes binding. Spray Zhuang Fengan and other regulators during the start-up period, shorten the internodes of the base, control the prosperous growth of the plants, and prevent lodging at the late stage of growth. During the jointing stage, topdressing watering, mu recovery urea 13-15 kg. Wang Changmiao to control the main. For the phenomenon without de-fertilization, the seedlings should be repressed early in the spring to avoid excessive spring tiller. Fertilizing and watering in the jointing stage will yield 10-15 kilograms of urea. If there is a phenomenon of de-fertilization, it will be top-dressing and watering in the area. Application of urea 10-15 kg.
(3) Repression and levitation shall be carried out, and rain shall be applied to topdressing the dry land. For non-irrigated dryland wheat, the repression and extraction of alfalfa should be used as a key measure for the management of spring wheat and improve the ability of wheat to resist drought. After returning the soil to the soil in early spring or following a light rain, nitrogen fertilizer is applied to the fertilizer. Generally, about 10 kilograms of urea are applied. The application of phosphate fertilizer to the base fertilizer with diammonium phosphate.
(D) Prevention and control of pests, chemical weeding, do a good job of comprehensive prevention. We must do well in the detection and prediction of root diseases such as sheath blight, total erosion, and root rot, virus diseases such as dwarfism and yellow dwarfism, as well as forecast and forecast of wheat spiders, underground pests and weeds, and guide farmers to use the right medicines for timely prevention and control. , to strengthen the chemical weeding after returning green, strictly in accordance with the use of concentration, suitable period and technical operating procedures to avoid phytotoxicity.
(e) To investigate the situation of winter frost damage in winter and timely manage the frozen wheat fields in winter and spring. Pay close attention to changes in the weather, water before cooling, adjust the microclimate near the ground floor, reduce the temperature change of the ground, and prevent freezing damage in early spring.
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