At present, wheat in Shandong Province has gradually entered the stage of jointing and jointing, but due to the low temperature in winter, rain and snow and windy weather in the middle and late March have caused freezing damage to wheat in some places.
According to reports, in recent years, wheat springs and freezes have occurred frequently in parts of Shandong Province during the period of wheat uplifting. Watering in time before cooling can adjust the near-surface temperature and ground temperature to achieve the effect of preventing early spring frost damage. In case of freezing damage, it is necessary to apply quick-acting fertilizer to promote early growth of seedlings and increase the rate of high-level tillers. Generally, about 10 kg of urea per mu is applied and plant growth regulators such as foliar fertilizer are applied early to promote the recovery of frozen wheat as soon as possible.
According to Sun Zuowen, a senior agronomist at the Provincial Plant Protection Station, wheat has a strong adaptability to tillering characteristics. When the main stem and the big tiller are frozen, the root system still absorbs the nutrients and the moisture base. The latent buds of the roots are rapidly sprouting and growing as long as they take timely remedial measures. It is possible that the heading is strong.
He introduced that the jointing period is a critical period for the number of ears per mu and the degradation of florets. During this period, the increase of fertilizer demand and water demand for wheat is the high-efficiency period of fertilizer and water management and the period of frequent pests and diseases. It is beneficial to promote the development of the jointing stage and increase the rate of ear formation by reducing the number of spikelets. “When the wheat is up and jointed, it is necessary to classify and manage the fertilization of the wheat field and strengthen the prevention and control of pests such as red spider, midge, blight, stripe rust.â€
Sun Zuowen of the wheat field that has suffered from freezing damage is recommended to use the following methods to “rescueâ€: “Hold the water and topdress. The wheat field that suffers from freezing damage should first be well watered to replenish the soil moisture to promote the recovery of wheat as soon as possible. At the same time, according to the degree of victimization, seize the time to chase Applying quick-acting nitrogen fertilizer to promote rapid seedling growth, small cockroaches to catch large cockroaches, increase high tillering rate and reduce frost damage. Generally, 10 kg of urea is applied per acre combined with watering. "At the same time, the damaged wheat field can be sprayed in time. A fertilizer for the plant cell membrane steady-state agent.
"The frozen wheat field is more vulnerable to pests and diseases, and it should be timely prevented." Sun Zuowen said that the prevention and control of wheat sheath blight, powdery mildew and rust can be evenly sprayed with a suitable liquid, and it can also cure the gray planthopper to prevent disease, insect and premature aging. And dry hot air" to reduce losses.
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