油菜连作,一是菌核病易逐年加重而导致减产;二是土壤内钾与硼易缺乏而导致减产。而我站每年冬季办油菜丰产样板,都是在杂交水稻田连年连作油菜的,由于着重抓如下五条,都取得较高产量,我们的方法是:(一)增施钾肥:油菜连作,特别是杂交水稻田连作,土壤内极易缺钾,而油菜缺钾在前期的表现一般不明显,当发现缺钾时,已值油菜的生育后期,无法补救。因此我们 Rape continuous cropping, sclerotinia susceptible to increase year by year and lead to reduced production; the second is the lack of potassium and boron in the soil led to the reduction of production. Our station every winter to do rapeseed model, are in the hybrid paddy fields even for rapeseed, due to focus on the following five, have achieved higher yields, our method is: (a) increase of potash: rape cropping, in particular Hybrid paddy field even cropping, potassium in the soil easily, but rapeseed potassium deficiency in the early performance is generally not obvious, when found in potassium, the value of the rape’s reproductive late, can not be remedied. therefore, we