油菜在生长发育过程中，往往由于管理不善或因缺乏某一种元素，生长发育受阻，因而产生不同程度的红叶、黄叶、揭叶。暗紫叶、灰白叶等现象。一、红叶（一）干旱红叶油菜苗期干旱，生长缓慢，植株矮小，叶色变为淡红色。对于旱引起的红叶油菜要及时浇水抗旱。浇水要沟灌，不可 Rape in the growth and development process, often due to poor management or lack of a certain element, growth and development blocked, resulting in varying degrees of red leaves, yellow leaves, Jie Ye. Dark purple leaves, gray leaves and other phenomena. First, the leaves (a) dry red rapeseed seedling drought, slow growth, plant dwarfs, leaf color turned pink. For drought-induced red rape must be timely watering drought. Watering to furrow irrigation, not