Frost may occur in Jiangsu next week. What are the dangers of frost?

During the growth and development process, trees are often threatened by natural disasters such as frost damage, cold weather drought, cold damage, sunburn, wind damage, drought damage and other natural disasters. Frost damage to trees is severe. As a result, the ornamental value and growth and development of the trees will be reduced, and in severe cases, the tree may die.

How to improve plants’ ability to withstand low temperatures?

The resistance of plants to low temperature mainly depends on the nature and content of the plant. The contents of soluble carbohydrates, free amino acids, as well as phosphorus, nitrates, enzymes, ascorbic acid, high-energy phosphates and nucleic acids which are important components of cells are positively correlated with plant resistance. Therefore, any action that can lead to an increase in the above substances can increase the cold tolerance of plants. For example, rational application of phosphorus and potassium fertilizers and spraying plant antifreeze can increase the concentration of cell fluid, lower the freezing point, and increase cold resistance.

What are the consequences of frost on plants?

After a plant is damaged by frost, the leaves will fade and turn white-green, then wither, dry out and lose their function. Due to insufficient grain filling, the grain becomes thin and shriveled, the thousand-grain weight is reduced, the seed coat becomes thicker, the yield and yield of rice are greatly reduced, and the taste becomes worse. Frost is also often the main cause of poor seed quality, especially for late-maturing seeds and nurseries, which is more dangerous. If sorghum seeds are frozen or field frozen before maturity, germination rates are significantly reduced. The earlier freezing damage occurs and the lower the temperature, the lower the germination rate. The germination rate of mature milk-stage seeds after freezing is 39%, and the germination ability is almost lost after freezing.

How to prevent plant frost?

Watering your plants before a frost, or covering the soil around them with ash, can keep the soil warm enough so that frost doesn't cause damage to your plants when it comes. In addition, you can also light fireworks next to the fields. The smoke can prevent frost for plants, but be careful about fire prevention.

In short, frost disaster will greatly reduce agricultural production. Freeze damages plant buds, rhizomes, and bark, resulting in pollen abortion, poor pollen fertilization, suppression of tree nutrients, reduced tree vigor, and nutritional imbalance. Even after the root system freezes, the absorptive function is lost, overwhelming the tree's life and resulting in reduced or non-existent yields.