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我省是白菜型油菜的原产地之一,种植历史悠久。在长期的自然驯化和劳动人民的辛勤培育与选择下,形成了一种植株矮小,生育期短,春性很强,含油量高,能够适应高山区阴湿和冷凉气候条件的油菜类型,在我国的油菜分类上,称为北方小油菜,目前我省脑山地区广泛种植的小油菜品种都属于这一种,习惯上叫做白菜型小油莱。我省地区辽阔,自然条件复杂,除有呈纵横交错的温暖河谷地带外,还有大量的山地,其中海拔二千七百米以上的高寒地区,由于气温低,作物生长缓慢,无霜期又短,严重限制了很多种作物的分布,一般海拔越高,能够种植的作物种类越少。到海拔三千
Our province is one of the origin of cabbage-type rapeseed cultivation has a long history. Under the long-term natural domestication and hard work of the working people, a kind of rapeseed with short plants, short growth period, strong springiness, high oil content and being able to adapt to the damp and cool climatic conditions in the high mountains is formed. In China’s rape classification, known as the northern rape, nowadays in our province Hill area widely planted small rapeseed species belong to this one, used to be called cabbage-type small oil Lai. In addition to the warm valleys that are criss-crossed, there are a large number of mountainous areas in the alpine region at an altitude of more than 2,700 meters. Due to the low temperature, slow crop growth and short frost-free period, the province has a vast area with complicated natural conditions. Seriously limited the distribution of many kinds of crops, the higher the general altitude, the fewer types of crops can be planted. To three thousand above sea level