Impact of Climate Warming on Winter Rape Planting in Gansu Province

The structure of agricultural planting has been influenced by global climate warming since 1950s,causing a lot of changes in the planting area and output of winter rape.In this research,the data from 16 weather stations on accumulated temperature(≥0 ℃),winter rape planting area,yield and phonological observation in the east parts of the Yellow River valley in Gansu were analyzed with the methods of mathematical statistics.The results showed that for winter rape,the planting area was extended about 100 km northwards,100200 m high above sea level and the whole growth periods shorted 1732 days,the yield also improved under climate warming.