When the solar term comes and the rainfall is sufficient and timely, cereal crops can thrive () A. Equinox B. Grain Rain C.
1, Grain Rain is one of the 24 solar terms, usually between April 19 and April 2 1 every year. This solar term marks the end of spring and the beginning of summer. The arrival of solar terms in Grain Rain means that the temperature starts to rise gradually and the rainfall also increases gradually. This climatic condition is very favorable for the growth of cereal crops.
2. In Grain Rain season, sufficient and timely rainfall means high moisture content in the soil, which can meet the needs of the growth of cereal crops. Water is very important for plant growth, because it is necessary for photosynthesis and nutrient absorption. Under the condition of sufficient water, the roots of cereal crops can better absorb nutrients and water and promote the growth and development of plants.
3. In addition to adequate water conditions, the solar term temperature in Grain Rain has also started to rise gradually. This warm climate is conducive to the growth and reproduction of cereal crops. With the increase of temperature, the metabolic rate of cereal crops will also increase accordingly, thus accelerating the growth rate of plants. At a suitable temperature, cereal crops can make better use of light energy and nutrients, and then thrive.
4. The lighting conditions of solar terms in Grain Rain are also abundant. Adequate light can provide enough energy for cereal crops and promote photosynthesis and nutrient absorption of plants. In the case of sufficient light, the leaves of cereal crops can better carry out photosynthesis, synthesize organic matter and promote the growth and development of plants.
The meaning of solar terms
1. Solar term refers to the time unit divided according to the position of the sun and natural phenomena such as climate and phenology changes on the earth. It is the wisdom crystallization of China ancient working people's long-term observation and study of natural phenomena, which reflects people's understanding and mastery of natural laws.
2. Solar terms are usually divided into 24 solar terms, and each solar term represents certain climatic characteristics and phenological changes. These solar terms cover all time periods from spring to winter, and each solar term has its own specific name and meaning. The vernal equinox, autumnal equinox, summer solstice and winter solstice are all very important solar terms, representing different climatic conditions such as equal division of day and night, long days and short nights, and short days and long nights.
3. The division of solar terms has profound historical and cultural significance. In ancient China, people gradually summed up the laws of the 24 solar terms by observing the movements of the sun, the moon and the stars. These solar terms not only reflect people's mastery of natural laws, but also reflect people's deep concern for agricultural production and daily life.