西宁市地处青藏高原东部,位于东经100°52′～101°55′,北纬36°31′～37°28′,属于大陆高原半干旱气候。河川谷地海拔2 170～2 350m,全年日照时数为2 560～2 830h,年总辐射量达6 123.70MJ/m~2,年降水量330～440mm,5～10月平均气温在12～25℃,无霜期为120d左右。夏季凉爽,日温差大,为花椰菜采种提供了得天独厚的自然条件。十多年来在花椰菜中熟品种(3-19-8、荷兰48、荷兰83)的采种技术上逐渐成 Located in the eastern part of the Qinghai-Tibet Plateau, Xining is located in the east longitude 100 ° 52 ’~ 101 ° 55’ and latitude 36 ° 31 ’~ 37 ° 28’ north, belonging to the semi-arid climate of the continental plateau. The river valley is 2 170-2 350m above sea level with the annual sunshine hours ranging from 2 560-2 830h, the annual total radiation reaching 6 123.70MJ / m 2, the annual precipitation 330-440mm, and the average temperature from May to October at 12 ~ 25 ℃, frost-free period is about 120d. Summer cool, large temperature difference, cauliflower seed mining provides a unique natural conditions. More than 10 years in cauliflower cooked varieties (3-19-8, the Netherlands 48, the Netherlands 83) seed cultivation technology gradually into