What does the solar term of sweet potato mean?

Summer is the twelfth solar term among the twenty-four solar terms and the last solar term in summer.

The summer heat is hotter than the summer heat, so it is called the summer heat. Summer heat means heat, and great summer heat means extreme heat. The summer heat lasts for five days and is divided into three periods, one is when the rotten grass is firefly, the other is when the soil is hot and humid, and the third is when it rains heavily. Every year around July 23rd, when the sun reaches 120 degrees, it is a hot summer, which is the highest temperature period in a year.

The hot summer is also a season that is very conducive to the growth of crops. During the hot summer, there are many folk customs, such as burning incense to pray for a bumper harvest, ginger to drive away the epidemic, Zhejiang to send boats to drive away the epidemic and pray for good weather, Guangdong to eat fairy grass, and southern Fujian to eat pineapple.

Influence of summer solar terms on agriculture

During the hot summer, the temperature in the northern region is high, often accompanied by short-term heavy rain, which is prone to pests and diseases. Experts in agricultural diseases and insect pests suggested that corresponding preventive measures should be taken in advance at this time, and animal husbandry experts reminded that it is necessary to guard against some plagues and epidemics caused by high temperature. The middle and lower reaches of the Yangtze River are in the summer drought period, and the leaf area of cotton reaches the maximum in its life during flowering and bolling, which is the peak of water demand.

It is best to require that the soil moisture in the field accounts for 70% ~ 80% of the field water holding capacity, and the flowering and pod setting of soybean is also the key period of water demand, so it should be watered in time in case of drought. At this time, the summer maize in Huanghuai Plain has been jointing and heading, which is the most critical period for yield formation, so it is necessary to guard against the harm of "neck drought". At this time, the high temperature and long sunshine in the south and east are often accompanied by little rain, which will not only limit the exertion of light and heat advantages, but also aggravate the adverse effects of drought on crops in spring and summer.