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成县地处西秦岭南麓陇南山区徽成盆地的西部,属大陆性半湿润气候和低辐射寡日照地区。年平均降水量637.0毫米,年平均温度11.9℃,≥10℃的活动积温3764℃,平均无霜期211天,年日照时数1795小时,太阳辐射总量106—107千卡/cm~2。复种大豆生育期间,(七、八、九、十月)平均降水量413.8毫米,太阳辐射量38.7千卡/cm~2,≥10℃的活动积温2274℃。光、热、水等气候条件比较充足,适宜发展复种大豆,群众亦有传统的种植
Chengxian County is located in the west of the Huicheng Basin in Longnan Mountain, south of the Western Qinling Mountains. It belongs to the continental semi-humid climate and low-radiation and oligo-sunshine area. The annual average rainfall of 637.0 mm, the annual average temperature of 11.9 ℃, ≥ 10 ℃ active accumulated temperature of 3764 ℃, the average frost-free period of 211 days, the annual sunshine hours of 1795 hours, the total solar radiation 106-107 kcal / cm ~ 2. During the growth of multiple cropping soybean, the average precipitation of 413.8 mm in July, August, September and October was 38.7 kcal / cm 2 for solar radiation and 2274 ° C for ≥10 ℃. Light, heat, water and other climatic conditions are adequate, suitable for the development of cropping soybean, the masses also have the traditional planting