In mid-August, it was the stage of corn heading and grain filling. In order to promote good grain filling in the corn and ensure that the seeds are full and full, it is truly a good harvest. Yang Yinfu, an associate researcher at the Agriculture College of Northwest Agriculture and Forestry University, suggested that corn growers should grasp the critical period. Do a good job of field management.
August is the most sensitive period of time when the corn powder is drawn to the silk. The lack of water supply will inhibit the elongation of the filaments and postpone the drawing of the silk so that the female ear cannot be properly fertilized. Therefore, Yang Yinfu said that during the pumping season, the water holding capacity in the field should be kept between 75% and 80%, and the amount of irrigation water per mu should be 60-75 square meters. At the same time, it is necessary to do a good job of top-dressing during the grain filling period. “The top-dressing amount can grasp the principle of light, medium-heavy, and light-duty, and top-dressing at the grain filling stage is 10% of the total amount of fertilizer.†Yang Yinfu said that topdressing with urea is appropriate, and the general mu fertilizer 5-10 kg. The land irrigated by drip irrigation or self-pressure hose can be sprayed with 5-10 kg special fertilizer for drip irrigation or other available nitrogen fertilizer.
At the same time, attention should be paid to the prevention of baldness or lack of basal granules. “Inadequate density, lack of water, and lack of nutrition, especially in the absence of phosphorus, are prone to baldness.†Yang Yinfu pointed out that water and fertilizer management must be well managed to ensure that corn has sufficient Water and nutrients, especially in the grain filling stage, should not be short of water or fertilizer, and nitrogen, phosphorus and potassium should be used in conjunction with fertilizer application. "At this stage, we must also pay attention to the prevention and control of smut disease in corn. The incidence of this disease is generally 2% to 8%. After the diseased plant is found, the diseased plant is removed in time and buried outside the field."
This period should also pay attention to prevent corn lodging, Yang Yinfu said that the lodging is caused by too much density, light, poor root development, poor lodging resistance, improper water and fertilizer management, and pest and disease damage. It has a large impact on yield and should be avoided as much as possible. Reduce. “To prevent corn lodging, we should use resistant varieties, reasonably dense planting, optimize water and fertilizer management, open up soil, and control and control measures. At the end of corn ear differentiation, we can spray 20 milliliters of corn saccharin per acre, which can effectively prevent the lodging of lodgings. Yang Yinfu said.
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