Climate factors. In the early stages of peanut growth in the southern peanut production area of ??Henan Province, temperature is the most important factor determining plant growth. In temperate areas, the daily average temperature during the peanut growing season varies by more than 10°C, and there are certain differences between years. In the early stages of peanut growth, when soil moisture and nutrients are basically suitable, the plants will grow very quickly when exposed to high temperatures. According to experiments in artificial climate chambers, peanuts grow fastest after germination at temperatures of 30°C during the day and 26°C at night. The dry matter accumulation of plants grown for 61 days is higher than those at 22°C during the day and 18°C ??at night, and at 18°C ??during the day and 14°C at night. The two treatments with ℃ were 74 and 98 higher respectively. Peanut production areas in Henan Province are mainly distributed in the Yellow River alluvial plain area, the shallow mountainous hilly basin area in southern Henan, the plain area in central Henan in Huaibei, and the mountainous and hilly area in northwest Henan. Among them, the Yellow River alluvial plain area includes more than 30 counties (cities) in 5 cities (prefectures), including Anyang, Xinxiang, Kaifeng, Shangqiu, Zhoukou, and Xuchang. Among the peanut producing areas in Henan, the most famous is Zhumadian Zhengyang County. Zhengyang County is located in the transition zone from the subtropical zone to the warm temperate zone, and is a typical continental monsoon climate zone. The soil here is fertile, the sunshine and moisture are abundant, and it is very suitable for the development of agriculture. Zhengyang County has planted about 1.7 million acres of peanuts and has been the largest peanut planting county in the country for many years. Therefore, it was awarded the title of "Peanut Capital of China". "Zhengyang Peanut" has also been approved as a national geographical indication protected product, and its well-known trademark is well-known far and near.