油菜是长江流域秋冬种植的主要作物。作为长江油菜带主产区之一,湖北省2003～2004年度种植面积已达120万公顷。总是来说全省油菜生长势头良好,但也存在一些问题,如今年开返花、花而不实及分段结实现象较为普遍,具体表现为植株分枝丛生,开花不断,植株仅有少量角果;严重的田块不 Rape is the main crop grown in the autumn and winter of the Yangtze valley. As one of the main producing areas of the Yangtze River rapeseed, Hubei Province has planted an area of ​​1.2 million hectares in 2003-2004. All in all, the rapeseed growth momentum in the province is good, but there are also some problems. For example, the phenomenon of returning flowers, blooming and fragmentation is more common in this year. The phenomenon is manifested in that plant branches are clustered, flowering is continuous, and plants have only a small amount Horn; serious fields are not