Winter rape planting time

The planting time of winter rape is generally sown in September and harvested at the end of May, but there are also some areas sown in late September. The planting time varies from area to area, subject to local actual conditions.

Distribution area of winter rape

1. North China Pass Central Asia Region

Including the southeast corner of Gansu Province, north of Qinling Mountains in Shaanxi Province, south-central Shanxi Province, Henan Province, Hebei Province and Shandong Province. Generally two years old. The annual average temperature in rape producing areas is 10℃~15℃, the coldest month is 1℃~3℃, the frost-free period is 180~240 days, and the annual precipitation is 500~800 mm. Rapeseed is mainly winter brassica napus, with a small amount of brassica napus.

2. Yungui Plateau Subregion

Mainly distributed in Yunnan Province and Guizhou Province. Altitude is above 1000 meters, average temperature in January is above 5℃, dry in winter and spring, annual rainfall is about 1000 mm, warm and dry in winter, rainy season from May to October, dry season from November to April, large evaporation, double cropping a year, rape has cabbage type, mustard type and cabbage type.

3. Sichuan Basin Subregion

Including Sichuan, Shaanxi Hanzhong and adjacent areas. The region has fertile soil and a warm and humid climate. The annual average temperature is 10℃~18℃, the average temperature in January in most areas is 2℃~5℃, and the annual rainfall is 1000~1200 mm (only 600~800 mm in Hanzhong area). There is relatively little sunlight. It is generally a first class and second class. Rapeseed is mainly Brassica napus, with a small amount of Brassica napus.

4. Middle Yangtze River Subregion

It mainly includes Hunan, Hubei, Jiangxi and parts of Henan and Anhui. The land in this area is fertile, the climate is mild, and the rainfall is abundant. The average minimum temperature in January is 2℃~6℃, and the annual rainfall can reach 1400~1600 mm. There is often drought in autumn, but the rainfall is concentrated in spring. Autumn sunshine is stronger. Mainly three times a year. Brassica napus is dominant, with a small amount of Brassica juncea and Brassica napus.

5. Lower Yangtze River subregion

include Shanghai City, Zhejiang, Jiangsu and eastern Anhui Province. The climate in this area is mild, with an annual average temperature of 15℃~18℃, an average temperature of 0℃~4℃ in January, and an annual rainfall of more than 1000 mm. The mouth is full. Fertile soil, good water conditions. Usually two crops a year. Brassica napus is the main type, only Anhui and Zhejiang have some Brassica napus, rape yield is high.

6. South China Coastal Subregion

It mainly includes Guangdong Province, Taiwan Province, Fujian Province, Hainan Province and the area south of Guilin in Guangxi. The temperature in this area is high, rainfall is abundant, frost and snow are few, the average annual temperature is 16℃~17℃, the average temperature in January is above 10℃, the highest is 21℃, the precipitation can reach 1500~2000 mm, and the sunshine is sufficient. Generally three or more ripe a year. Rapeseed is an early-maturing spring variety with short growth period. Brassica napus and Brassica napus are cultivated, but the planting area is very small.