Is the sandy land, climate and temperature in Kaifeng suitable for planting yam?

Yam cultivation requires high temperature. The growth and development of Chinese yam seedlings generally require that the ground temperature should not be lower than 9~ 10℃, and the optimum temperature for the later growth of Chinese yam is 22~30℃. The annual average temperature in Yucheng County is 14℃, and the extreme minimum temperature and extreme maximum temperature are around 0℃ and 40℃ respectively, while the extreme minimum temperature usually appears in winter and has little effect on yam. The temperature in Yucheng County rises rapidly in spring, and the ground temperature usually exceeds 9℃, which is more conducive to the cultivation of yam seedlings. After planting and transplanting in the field in late April, the local temperature in Yucheng County is generally above 65438 06℃, which can ensure the temperature conditions for yam growth. Judging from the accumulated temperature conditions of yam growth, the annual average accumulated temperature in Yucheng County is 5 132℃ when it exceeds 15℃ and 3670℃ when it exceeds 15℃, which is very suitable for yam growth. Note: When the temperature is lower than 15℃, it is not conducive to the flowering and inoculation of Chinese yam. Therefore, if the flowering period of Chinese yam encounters continuous low temperature, manual intervention should be taken to prevent adverse flowering from affecting the yield of Chinese yam [4].

1.2 moisture

Yam is a kind of cash crop that is very sensitive to water. Persistent drought will slow down the development of yam, reduce its yield, and even lead to no harvest in severe cases; However, if excessive precipitation is not drained in time, it will lead to water accumulation in the field, affect the air circulation in the soil, lead to poor resistance to pests and diseases of yam plants, and seriously affect the quality and yield of yam. Judging from the precipitation in Yucheng County, there is generally less precipitation in spring, more precipitation in summer, the least precipitation in autumn and more snowfall in winter. The average annual precipitation in Yucheng County is 726 mm ... The spring in Yucheng County is just in the growth period of yam seedlings, and the requirement for water is not high, which is more conducive to the growth of yam seedlings. Yucheng County is rich in summer precipitation, with the precipitation exceeding 380mm from June to August, and there are often short-term heavy precipitation. Therefore, attention should be paid to field drainage and dredging to minimize field waterlogging [5]; There is less precipitation in autumn in Yucheng County. If there is high temperature and summer drought at the end of summer, furrow irrigation should be carried out to prevent the long-term drought from affecting the yield of yam.

1.3 lighting

Yam is a crop that likes light very much. Especially under the condition of short sunshine, it is beneficial to the growth and expansion of yam underground rhizome. The annual average sunshine hours in Yucheng County is 2600 hours, of which the sunshine hours in June-August are longer, and the sunshine rate exceeds 50%. Generally speaking, sunshine conditions are very beneficial to the growth and development of yam. Yam vines grow rapidly from April to May, and when they exceed 50~60cm, they are easy to shade. Yam growers should pay attention to improving the light transmission conditions in the field through "scaffolding", ensuring the necessary sunshine for yam growth, strengthening the photosynthesis of leaves, reducing pests and diseases, and improving the quality and yield of yam.