油菜移栽后，开始植株生长缓慢，叶片逐渐由绿变红，最后叶片脱落，有的仅存顶荪。究其原因：大体是渍害、缺肥、干旱、低温所致。特别是甘蓝型油菜和迟载的油菜发生较多，抢救办法应根据油菜红叶的原因进行。因地势低洼、排水不良、土壤渍水过多而造成的红叶，应开深沟，降低 After transplanting rape, the plant began to grow slowly, the leaves gradually turn from green to red, and finally the leaves fall off, while others only survive top sun. The reason: The general is stains, lack of fat, drought, low temperature caused. In particular, more rapeseed and late rape occur, the rescue methods should be based on the reason red rape leaves. Due to low lying, poor drainage, soil waterlogging caused by excessive leaves, should open deep groove, lower