鄂西自治州位于武陵山系,水稻主要种植在海拔800～1200米的二高山地带面积约占一半以上。这一地区的气候特点与我省其它地区的气候有很明显的差别,主要表现为气温低、雨量多、湿度大、日照少。该区年降雨量一般在1500～1700毫米,水稻抽穗期(8月份)平均雨日为16天,气温22℃左右。由于山区雾多露重,相对湿度常在80％以 Hubei Autonomous Prefecture is located in the Wuling Mountains, rice cultivation mainly in the altitude of 800 ~ 1200 meters of the alpine zone covers an area of ​​about more than half. The climatic characteristics of this area are obviously different from those of other areas in our province. The main features are low temperature, heavy rainfall, high humidity and few sunshine. Annual rainfall in this area is generally 1500 ~ 1700 mm, rice heading date (August) the average rainfall day is 16 days, the temperature is about 22 ℃. Due to heavy fog in the mountains, the relative humidity is often 80%