Climatic conditions in Jianghan Plain, Hubei Province

Jianghan plain belongs to subtropical monsoon climate, with an average annual sunshine hours of about 2000 hours and an annual total solar radiation value of about 460 ~ 480 kJ/cm2. The frost-free period is about 240 ~ 260 days, the duration above 10℃ is about 230 ~ 240 days, and the active accumulated temperature is 5 100 ~ 5300℃. The annual average precipitation is1100 ~1300mm, and the precipitation from April to September with high temperature accounts for about 70% of the annual precipitation. Among them, the subtropical climate can meet the heat requirements of cotton and rice, and the dry weather in July and August every year can meet the light requirements of cotton production. The rich water sources in the main branches and tributaries of the Yangtze River can meet the water demand of rice.

The local climate is suitable (rainy and hot at the same time, with sufficient light and heat), the soil is fertile (alluvial soil, paddy soil), the terrain is flat and open, and the water is sufficient, which is beneficial to the cultivation of cotton and rice.