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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等等。因此,对连作油菜,要精心管理,加强措施。 1 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。油菜缺钾,前期表现一般不明显,当发现缺钾时,已值油菜的生育后期,无法补救。因此,油菜施钾,应从前期入手,要求在油菜移栽成活施第一次壮苗肥10天后,每667m~2用氯化肥6～7kg,加人粪尿100～150kg兑水1000kg浇施;春后2月底结合松土培蔸用上述方法再施钾一次,施用量同上。
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 lead to a lack of production and so on. Therefore, even for the rape, we must carefully manage and step up measures. An increase of potash. Rape continuous cropping, especially hybrid paddy field even in the soil easily potassium deficiency. Potassium deficiency, pre-performance is generally not obvious, when found potassium, the value of the rape’s reproductive late, can not be remedied. Therefore, rape potassium, should start from the early stage, requiring rape transplanting survival of the first strong seedling fertilizer after 10 days, every 667m ~ 2 with 6 ~ 7kg of chlorinated fertilizer, adding human excrement 100 ~ 150kg watered 1000kg pouring facilities; After the end of spring 2 with the loose soil cultivation 蔸 potassium again with the above method, the same amount applied.