The open cultivation season of cucumber varies depending on the climatic conditions. Heilongjiang, Jilin, Inner Mongolia, Liaoning, Shanxi, Hebei, and northern Shaanxi have cold or cold climates. The frost-free period is short. It is about 130 to 180 days a year. The summer temperature is relatively high. , but the night is cool, mostly below 25 °C, very suitable for cucumber production, and can safely over the summer, from spring to autumn growth period 6 to 7 months, and the disease is lighter, is a single masterpiece area. In Liaoning, Hebei, Shanxi, and southern Shaanxi, Shandong, Henan, Beijing, Tianjin, Jinan and Jiangsu, Anhui, and northern Hubei, the frost-free period is more than 200 days. The climate is characterized by mild spring, abundant sunshine, and low rainfall, but the summer is hot and rainy. The autumn is cool, and the temperature drops rapidly. In this area, cucumber cultivation in open areas includes spring cucumber (early cultivation), summer cucumber (common cultivation), and autumn cucumber. Spring cucumber is the main form of cultivation, generally 35-40 days before frosting nursery, colonization after frost, cucumber growth after spring cultivation, flowering results are good, listed early, high yield. However, in the middle and late periods, it is often due to high temperature and rain, downy mildew, anthrax serious, can not be over the summer, generally pulled around in mid-July. Cucumber commonly cultivated in this area is live or nursed after the frost break, and then the spring cucumber is marketed. The sowing date is not very strict. Generally, the harvest is started more than 50 days after sowing and the harvest period is 30 to 50 days.
Autumn cucumbers are usually exposed live or nursery in the local 3-4 months prior to the initial frost, and harvesting is started around 50 days after sowing, and the chill is exposed. In order to accurately determine the sowing date and time for planting cucumbers in various regions, we can determine the cucumber frost period and the above principles. In the middle and lower reaches of the Yangtze River in Hubei, Hunan, Jiangxi, Zhejiang, and Shanghai, as well as in Anhui, southern Jiangsu, and northern Fujian Province, the climate is warm and humid with a long frost-free period. It is also possible to cultivate three cucumbers in open fields in a year, that is, in spring and spring. In the summer and autumn, and in areas with abundant rainfall and annual warm temperatures in Hainan, Guangdong, Guangxi, Taiwan, Hong Kong, and southern areas of Fujian and Yunnan, cucumbers can be planted in open seasons all year round due to the lack of frost all year round. However, due to strong typhoons and torrential rains, the output was unstable.
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