土壤水分过多或地面渍水对油菜的生长发育所造成的阻碍,称之为油菜渍害,也叫湿害。油菜渍害是油菜生产中的常见气象灾害。特别是在地势低洼的地段,造成渍害危害的机率极高。防治渍害的关键在于降低地下水位,降低土壤水分含量,结合苗期增施速效肥,促进油菜健壮生长,提高抗逆能力,同时及时防止次生病害的发生。1.选用耐湿性强的品种在水旱轮作区、地势低洼、地下水位较高以及容易发生渍害的地区,应选择具有较高的相对发芽率,较高的相对苗长、根长、苗重和活力指 Soil moisture or ground water rape on the growth and development caused by the obstruction, called rape stains, also known as wet damage. Rape stains are common meteorological disasters in rapeseed production. Especially in the low-lying lots, the chances of causing the stain damage are extremely high. The key to preventing and controlling waterlogging is to reduce groundwater level and soil water content, and to combine with quick-effect fertilizer at the seedling stage to promote the robust growth of rapeseed and improve the resilience, and to prevent secondary diseases in time. 1. Selection of varieties with high moisture tolerance in the rotation and drought zone, low lying, high groundwater levels and prone to stains in areas should choose to have a relatively high germination rate, relatively high seedling length, root length, seedling Heavy and vitality means