Grain Rain phenomenon: Grain Rain phenomenon.

As the saying goes, "Spring rain is as expensive as oil", and the rainy and humid Grain Rain season is a good time to plant seedlings, grow melons and order beans. As one of the solar terms that have great influence on spring ploughing, what are the phenomena in Grain Rain? Let the old almanac show you the phenomena in Grain Rain and the phenology in Grain Rain.

In ancient China, Grain Rain was divided into three stages: "The first stage was when Ping was born; The second time, pigeons blow feathers; The third is that Dai Sheng fell to Sang. " 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 southern China has proved that planting Osmunda japonica early in Grain Rain can seal vine leaves before summer drought, enhance drought resistance and achieve high and stable yield.