我国西部高海拔地区和北部高纬度地区,由于无霜期短、平均气温低,生产上种植的油菜品种,都是全生育期能耐低温侵袭,并具特早熟习性的类型。这种品种特性,长期以来都是为在当地驯化产生的地方品种所独有,外来品种的适应能力都很差。据多年 Due to the short frost-free period and low average temperature, the rape cultivars grown on the production of high altitude in the western part of China and the northern part of the high latitudes in the northern part are all of the types that are able to withstand low temperature during the whole growth period and have a very early maturity. This breed trait has long been unique to local breeds that have been domestically produced domestically and exotic breeds have poor adaptability. According to many years