The significance of cold dew solar terms:
1, the cold dew solar term is one of the 24 solar terms, indicating that the temperature is gradually decreasing and the weather is getting cold. Cold dew means that the temperature is lower than that of the white dew, and the dew on the ground is colder and will soon condense into frost.
2. The significance of cold dew solar terms in China mainly lies in climate change and agricultural cultivation. In the vast area north of Nanling, the cold dew season has entered autumn, the northeast has entered late autumn, and the northwest has entered or will soon enter winter. In agriculture, the cold dew solar term marks that crops are about to enter the harvest season, and it is also an important period to protect and improve the ecological environment.
3. Cold dew solar terms are still an important period for people's health care. In the cold season, people should strengthen physical exercise, improve their physical fitness, enhance their resistance, and at the same time pay attention to cold and warmth, keep indoor air circulation, and prevent the occurrence of diseases such as colds.
The influence of cold dew festival on agricultural production;
1. Growth and development of crops: Cold dew is a solar term in which the temperature drops obviously, which will hinder the growth and development of crops to some extent. During the cold dew period, the growth rate of some crops will obviously slow down, and even the phenomenon of stiff seedlings will appear, which will lead to the extension of crop growth period and further affect crop yield and quality.
2. Occurrence and spread of crop diseases and insect pests: The low temperature environment during the cold dew period is conducive to the reproduction and spread of germs and pests. Low temperature environment will break the dormancy of some pests and make them enter the breeding period ahead of time, which provides conditions for large-scale outbreak of pests. At the same time, the low temperature and high humidity environment in the cold dew period is also conducive to the propagation and spread of pathogenic bacteria, which is easy to cause some crop diseases, such as rice sheath blight and rice blast, and has a great impact on crop growth and yield.
3. Release of soil nutrients: Low temperature will slow down the release of soil nutrients during cold dew. At low temperature, the decomposition rate of organic matter in soil will slow down, resulting in insufficient release of soil nutrients, which will further affect the nutrient absorption and normal growth of crops. Therefore, during the cold dew period, agricultural producers need to strengthen field management and apply fertilizer reasonably to ensure the normal growth and development of crops.
4. Growth and development of late rice: For double-cropping late rice, cold dew wind is an important agrometeorological disaster. After the cold air invaded the south in autumn, it caused obvious cooling, resulting in grain shrinkage and empty shell of late rice. Therefore, agricultural producers need to take active defensive measures, such as arranging suitable sowing date according to the occurrence of cold dew wind, breeding low-temperature tolerant and high-yield varieties, strengthening field management, rational fertilization, scientific water use, improving farmland microclimate and so on, in order to reduce the harm of low temperature.
Influence of Cold Dew Solar Terms on Agricultural Production and Ecological Environment
1, cold dew is a solar term in which the temperature drops obviously, which will hinder the growth and development of crops to some extent. During the cold dew period, the growth rate of some crops will obviously slow down, and even the phenomenon of stiff seedlings will appear, which will lead to the extension of crop growth period and further affect crop yield and quality.
2. The low temperature environment in the cold dew period is conducive to the reproduction and spread of germs and pests. Low temperature environment will break the dormancy of some pests and make them enter the breeding period ahead of time, which provides conditions for large-scale outbreak of pests.
3. Cold dew solar terms are also an important period for water resources management and protection. During the cold dew period, the temperature decreases, the rainfall decreases, and the water level of rivers and lakes decreases, which brings convenience to sewage discharge and treatment. At the same time, the cold dew solar term is also an important period for the growth and reproduction of aquatic animals and plants. It is necessary to strengthen the protection and management of the ecological environment in water areas to ensure the diversity and ecological balance of aquatic animals and plants.