去秋阴雨连绵,一些油菜播种或移栽偏迟,菜苗瘦小,即使适时播种的也因日照不足,土壤湿度大,板结,根系和地上部分生长缓慢.同时,油菜返青后,蕾苔、开花期短(仅50多天),但积累的干物质占全生育期干物质总量的40%,吸收的氮占整个生育期的50%,磷占40%,钾占40%,是油菜需水需肥最多的时期.因此,要在全国农业学大寨会议精神指导下,以阶级斗争为纲,加强春季管理,夺取油菜丰收.(一)重施蕾苔肥,轻施始花肥:春季管理主要是促进春发,增加叶面积,增强光合作用,促进多分枝,果序长,花蕾、结角多,重施蕾苔肥是关键性措施.一般在抽苔期(主茎顶端距子叶节10厘米),每亩条施标准氮肥20—30斤.要促中有控,发中求稳,促其盛发,控其过旺,以达到春发稳长,防止稳而不发或发而不稳.群众的经验是看天、看地、看苗施苔肥.春季高温多雨少施,低温干旱多施;前期肥饱地力足的少施, Autumn rains, some rapeseed planting or transplanting late, seedling thin, even if timely sowing due to lack of sunshine, soil moisture, compaction, roots and parts of the ground to grow slowly.At the same time, the rape is green, the buds, flowering Short (only 50 days), but the accumulation of dry matter accounted for 40% of the total dry matter during the whole growth period, absorbed nitrogen accounted for 50% of the entire growth period, phosphorus 40%, potassium 40% Therefore, we should take the class struggle as the key link, strengthen the spring management and seize the bumper harvest of rape under the guidance of the National Agricultural Science Dazhai Conference Spirit. Mainly to promote the spring, increase the leaf area, enhance photosynthesis and promote multi-branched, long order, buds, knot more, relying on the lawn moss is a key measure.Usually in the bolting period 10 centimeters), mu of standard nitrogen fertilizer 20-30 catties .To promote the control, hair in the stable, and promote its Shengfa, control its over-flourishing, in order to achieve a steady spring hair, to prevent the steady hair or hair But not stable.The masses experience is to look at the sky, look at, see Miao Shi Mushi.The spring high temperature and rain less facilities, low temperature and drought more facilities;