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一、一栽就管油菜一栽就管,加强越冬管理,是夺取油菜丰收的重要措施,稍有疏忽,便会造成严重缺苗,甚至减产。据调查,一般年份,油菜越冬死苗在20%左右,严重者可达50%以上。1976年冬,气候反常,我县种油菜3.08万亩,1977年实收仅8,707亩,油菜死苗失收面积很大。鉴于这一教训,要确保油菜安全越冬,必须抓住移栽后短暂的高温季节,加强肥水管理,争取年前(农历)有一定大小的营养体(10叶过年),切实抓好抗旱防冻措施。根据田间调查资料分析,油菜越冬期单株叶片数,最大叶长、宽和根茎粗度与年后产量呈正相关。越冬期每增加1片叶(4—10片叶
First, a planted pipe rape one plan to strengthen winter management, is an important measure to seize rape bumper harvest, a slight negligence, it will result in serious lack of seedlings, or even cut. According to the survey, the general year, rape overwintering dead seedlings in about 20%, severe cases up to 50%. The winter of 1976, the climate anomalous, my county rape 30,800 acres, only 8,707 acres in 1977 actually received, rape dead seedlings lost a large area. In view of this lesson, to ensure the safety of rape overwintering, we must seize the transient high temperature season after transplanting, to strengthen fertilizer and water management, strive for years (Lunar New Year) have a certain size of the body of nutrients (10 leaves New Year), earnestly grasp drought and frost measures . According to the field survey data, the number of leaves per plant, the maximum leaf length, width and rhizome roughness at the end of winter were positively correlated with the annual yield. Each additional leaf during wintering (4-10 leaves