一、缺氮黄红叶油菜缺氮时植株矮小,新叶出生慢,叶片小,一般叶缘发红,中部为黄色,形成黄红叶。对策:每667平方米追施尿素8～10千克或碳铵20～30千克,也可用7.5千克人粪尿对水浇施,还可用1%～2%尿素溶解液50千克进行叶面喷施,连喷2～3次。二、缺磷紫红叶油菜对磷素反应十分敏感, First, the nitrogen-deficient Yellow Red Rape Nitrogen deficiency plant short, young leaves are slow, small leaves, the general red edge of leaves, the central yellow, the formation of yellow leaves. Countermeasures: every 667 square meters topdressing urea 8 to 10 kg or ammonium bicarbonate 20 to 30 kg, also available 7.5 kg of human excrement on the water facilities, but also with 1% to 2% urea solution 50 kg foliar spray Even spray 2 to 3 times. Second, lack of phosphorus Purple leaves of rapeseed is very sensitive to phosphorus,