Yam, the scientific name of yam, is a kind of root vegetable, which is crisp and refreshing when eaten raw and delicate when cooked. Yam can warm the spleen and stomach, nourish yin and tonify the kidney, and has the same origin of medicine and food, which is very in line with the concept of modern diet and health preservation, so it is deeply loved by consumers. If you want to grow a good yam, you must understand the growth conditions it adapts to and manage it according to local conditions in order to get good returns. Hebei Province, as a major province of yam cultivation, has many geographical indication products of yam.

The Chinese herbal medicines produced in Wuzhi County, wen county, Qinyang City, County and mengzhou city under the jurisdiction of Jiaozuo City in northern Henan Province are called Dioscorea opposita, which is located at 32 42 ′ ~ 33 02 ′ north latitude and112 08 ′ ~1east longitude. This area borders the Yellow River in the south and Taihang Mountain in the north. Hemp yam is not strict with temperature, and it is planted in both north and south. The suitable sowing temperature is about 65438 03℃, and the average temperature in the growing period is about 65438 05 ~ 26℃. If the growth period is lower than 15℃ or higher than 40℃, the plant growth will be hindered.

Suitable temperature: Yam requires relatively little temperature, as long as the temperature difference at each stage is not too outrageous. For example, the temperature of yam in the sowing stage should be about 15 degrees, and the temperature in the growth stage should be about 15 degrees -25 degrees. Selection of varieties and seedlings: robust, high-yield, high-quality and disease-resistant varieties should be selected. At present, the varieties cultivated in our county are Bangyao and Xiaobaizui. To plant yam, we should choose even, neat and disease-free tubers, and change them 1 time after 4 ~ 5 years.

Generally, after the soil is thawed in April, the yam ditch with a width of 30-40 cm, a depth of 50-60 cm and a spacing of 60 cm is dug. During excavation, soil shall be taken in layers for backfilling. Fill the trench bottom, evenly place plastic sleeves at intervals of 30 cm, select the land at one end of the incision, then dig it deeply, rake it carefully, and apply sufficient fertilizer in combination with deep tillage. Then, raise the ridge or make it high or flat. Generally, the ridge width is 40 ~ 50 cm, and the ridge width is 100 ~ 120 cm. The length of the ridge depends on the terrain.