近几年 ,杂交油菜种植面积不断扩大 ,由于土壤有机肥投入不足 ,硼氮用肥比例失调和重茬连作等原因 ,由土壤缺硼引起的油菜萎缩不实症逐年加重。据调查 ,1996～1999年潢川县油菜田由土壤缺硼引起的萎缩不实症的发生面积累计 30 .8万亩 ,占该县油菜播种面积的 41.1% ,其中减产五 In recent years, hybrid rapeseed area continues to expand, due to inadequate investment in soil organic manure, boron and nitrogen fertilizer imbalance and continuous cropping and other reasons, due to lack of boron rape soil atrophy aggravated gradually year by year. According to the survey, in 1996 ~ 1999 Huangchuan County rape fields caused by boron deficiency caused by the incidence of anecdotal disease accumulative total 308,000 mu, accounting for 41.1% of the county sown area of ​​rape, which cut five