What is Grain Rain and what are its characteristics?

Grain Rain, as its name implies, is also one of the twenty-four solar terms, and it is also the best season for planting seedlings and cultivating melons, fruits and beans. Every year from April 19 to April 2 1 day, when the sun reaches 30 longitude of the Yellow River, it is Grain Rain. When the rain increases, it is very beneficial to the growth of cereal crops. "In mid-March, after the rain, the soil will grow. If it rains, we will sow from top to bottom. " At this time, the weather is mild and the rainfall increases obviously, which has a great relationship with the growth and development of cereal crops. Appropriate rainfall is beneficial to the greening and jointing of overwintering crops and the sowing and emergence of spring sowing crops. In ancient times, the so-called "rain gives birth to hundreds of valleys" embodies the significance of modern agricultural climate of "Grain Rain". However, excessive rainfall or severe drought will often cause harm and affect the later yield.

In ancient China, Grain Rain was divided into three stages: "The first stage was when Ping was born; The second time, the cuckoo blows feathers; The third season is the fall of mulberry in Dai Sheng. " After Grain Rain, the rainfall increased, duckweed began to grow, then cuckoo began to remind people to sow, and then Dai Sheng bird began to be seen on the mulberry tree.

Second, the weather characteristics of Grain Rain

The main feature of the weather in Grain Rain is rainy. After the solar term in Grain Rain, rainfall increased, and rain gave birth to hundreds of valleys. With sufficient and timely rainfall, cereal crops thrive.

In ancient China, Grain Rain was divided into three stages: "The first stage was when Ping was born; The second time, the pigeon blew its feathers; The third stage is the mulberry planting in Dai Sheng. "After Grain Rain, rainfall increased, duckweed began to grow, then cuckoo began to remind people to sow, and then Dai Sheng birds began to be seen on mulberry trees.

After the solar term in Grain Rain, the rainfall increased and the humidity in the air gradually increased. At this time, we should follow the changes of natural solar terms and take care of the climate characteristics. At the same time, due to the warmer weather, people's outdoor activities have increased, and peach blossoms and apricot blossoms have opened in the northern region; Catkin and catkins fly everywhere. Rain has bred hundreds of valleys. With sufficient and timely rainfall, cereal crops can thrive. In the southern region where the grain is abundant, "when the flowers fall, the cuckoo cries at night, the peony blooms and the cherry is ripe." The natural scenery tells people that it is late spring.

At this time, the temperature in the south rises rapidly. Generally, in late April, except for parts of northern and western South China, the average temperature has reached 20℃ to 22℃, which is more than 2℃ higher than that in mid-April. In the eastern part of South China, there is often a high temperature above 30 for a day or two, which makes people feel very hot. Low-altitude valley areas are used to enter summer. The climate characteristics of high temperature in south China in spring are beneficial to the early cropping cultivation measures in Da Chun. The suitable planting temperature of Polygonum cuspidatum is 65438 08℃ to 22℃, which can be satisfied at this time. The experience in the old arid areas in the south proves that planting Osmunda japonica early after Grain Rain can seal the vine leaves before the summer drought, and enhance the drought resistance, and the high and stable yield can reach 20 mm. Therefore, there is a saying that "spring rain is as expensive as oil".

In Grain Rain, high temperature and frequent rainy weather will lead to the occurrence and prevalence of wheat diseases and insect pests. The vast rural areas should do a good job in the prevention and control of wheat diseases and insect pests according to the weather changes.