近年来,我省各地油菜在冬季出现早苔早花现象比较普遍。究其原因,主要有两条:一是部分农户采用了半冬性的中早熟油菜品种,而且播种偏早,如遇暖冬的年头,油菜苗加速花芽的分化,导致早苔早花现象;二是如遇冬季天气干旱,土壤干燥,田间管理跟不上,追肥不及时,致使油菜提前进入生殖生长,也是油菜早苔早花的原因。油菜出现早苔早花,消耗了养分,隆低了油菜苗植株细胞浓度,消弱了抗寒力,往往 In recent years, rapeseed throughout the province in early winter appear early prenuptial phenomenon is more common. The reason, there are two main: First, some farmers use a semi-early winter precocious rape varieties, and sowing too early, in case of warm winter years, rape seedlings accelerate the differentiation of flower buds, leading to early premature bloom phenomenon; In case of arid winter weather, dry soil, field management can not keep up, not timely fertilizer, resulting in rape earlier into reproductive growth, but also rape early rapeseed reasons. Early rape appeared rape early rape, consuming nutrients, rapeseed plant cell density, weakening the cold hardiness, often