我县位于江苏省的北部,经常发生春旱、秋旱、寒潮、霜冻、大风等自然灾害,对发展油菜生产很不利。油菜越冬期间(12月下旬至翌年2月中旬),常年平均气温在零下0.6—1.6℃,寒潮侵袭时,气温一般下降至零下10—15℃。冬油菜一般在0℃时地上部即停止生长,0℃以下常有不同程度的冻害发生。大田生产越冬死苗率一般20%左右,个别田块高达50%以上,造成严重减产或改种春作物。为了解决油菜安全越冬的问题,我们从1976年起改进了栽培措施,改平地移栽油菜为防冻朝阳沟栽植,显著地提高了油菜的产量。去年1.5亩泸油23号油菜,亩产421.3斤。去年王店公社农科站70亩油 My county is located in the northern part of Jiangsu Province, where natural disasters such as spring drought, autumn drought, cold spell, frost and gale are frequent, which are detrimental to the development of rapeseed production. Over the winter rape (late December to mid-February the following year), the annual average temperature at minus 0.6-1.6 ℃, cold wave invasion, the temperature generally dropped to minus 10-15 ℃. Winter rape is generally 0 ℃ when the upper part of the stop growing, often below 0 ℃ different degrees of frost damage occurs. Field production of winter dead seedlings rate of about 20%, individual fields up to 50% or more, resulting in serious cuts or re-spring crops. In order to solve the problem of overwintering the safety of rapeseed, we improved the cultivation measures since 1976, transplanting the rapeseed flatly for the planting of frost and sunning ditch, and significantly increased the yield of rapeseed. Last year, 1.5 acres of oil rape 23rd, 421.3 kg per mu. Last year Wangdian commune agricultural station 70 acres of oil