It is currently on the threshold of nine cold days, with low temperatures, rain, and snow. How can we strengthen the management of soil fertility in the field and restore the losses after a strong cooling and snowfall? Before the advent of the next cold wave, how can we prevent the "cold fever" of the crop?
Soil Fertility Management Reduces Frost Damage
For crops that suffer from frost damage, potassium dihydrogen phosphate can be applied in excess, and plant growth nutrients can be applied. New products and technologies such as organic water-soluble fertilizers can also be used to improve crop resistance and resistance and lay a foundation for restoring growth. . In addition, due to the growth of crops, fertilizer-deficit plots should be topdressed with available nitrogen fertilizer as early as possible, and appropriate additional phosphorus and potassium fertilizers. Rape, vegetables, fruit trees, etc. should also pay attention to the application of trace element fertilizers to promote the recovery of crops as soon as possible. Using straw mulching, field planting of ash or chaff, warming and protecting seedlings, high-quality composting of livestock and poultry waste, composting of straw compost, biogas slurry and other high-quality organic fertilizers are added to increase soil organic matter and improve conditions of soil water and fertilizer.
Supplementary Nutrition Enhances Crop Resistance
Winter wheat has a strong vitality. As soon as it is chilled, as long as the supply of fertilizer and water is strengthened, it is possible to have a strong heading. Immediately apply topdressing nitrogen fertilizer, apply urea 5 ~ 7.5 kg per mu, combined with watering, cultivator loose soil to protect the remedial, and promptly do a good job of foliar fertilizer and pest control.
Tea leaves that are lightly chilled and damaged by tea often have a large amount of defoliation or curling after freezing. When the temperature rises to a daily average temperature of about 10°C, the foliar topdressing is 0.3% to 0.5% urea and continuous spraying of 2 to 3 times. Times.
Rape to promote branching growth, generally 5-7 kilograms of urea urea, potassium chloride 3 to 4 kilograms or spray 0.2% potassium dihydrogen phosphate solution, or apply fertilizer with high compound fertilizer. After the harvesting of the plot, it is appropriate to fertilize the crop, and apply 5 to 7 kg of urea per acre to promote branch growth. In addition, 0.1% to 0.2% boron fertilizer solution is sprayed for about 50 kilograms per acre to promote flower bud differentiation.
Facilities Vegetables For uninjured or lightly damaged vegetables, spray 2–3 times 0.2% potassium dihydrogen phosphate solution as appropriate; for nitrogen-deficient plants, spray 2–3 times 0.3% urea solution. Even if nitrogen fertilizer is applied, the soil shall be applied afterwards to avoid volatilization of ammonia under closed conditions.
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