Crop planting patterns and time in northern provinces and cities of China

Geographically, the areas east of Qinghai-Tibet Plateau, north of Qinling Huaihe River and south of Inner Mongolia Plateau are northern areas, so the northern provinces and cities are: Heilongjiang, Liaoning, Jilin, Hebei, Inner Mongolia, Ningxia and Xinjiang north of the Great Wall; To the south of the Great Wall are: Beijing, Tianjin, most of Hebei, Shanxi, Henan, Shaanxi, Qinghai, northern Jiangsu and northern Anhui. Most of the central and eastern parts of China have subtropical monsoon and warm temperate monsoon climate, while the southern part of northern China has warm temperate monsoon climate, with abundant sunshine and rain in summer, so most crops are harvested twice a year, while parts of northern Heilongjiang have sub-frigid monsoon climate, with long winter and short summer, so the area north of the Great Wall is one year. North of the Great Wall: once a year.

South of the Great Wall: One crop a year or three crops every two years. The rotation mode of rice, corn and wheat is as follows: rice: planted in the northern region from March to April, sown in the northern and southern regions from May to June, and the harvest period is 9- 10 respectively;

Corn: The sowing period is February-April and July-September, and the harvest period is June-August.10-1. Wheat: Spring wheat is planted in Heilongjiang, Inner Mongolia and Northwest China, sown in March-April, matured in July-August, and has a short growth period of about 100 days; Winter wheat is planted in North China, South Xinjiang, Shaanxi and the first generation Qinling provinces in Huaihe River basin. Sow in September ~165438+1October in autumn, mature in May ~ June the following year, and the growing period is about 300 days.