油菜打薹杆株需要有较强的长势,才能使其再生分枝和花蕾角果较多。研究表明:在密度为3万株/公顷的情况下,以施纯氮207kg/公顷的处理,冬前绿叶数达13.7—14.5片,最大叶长达37—40cm;成熟期小分枝数在100个以上,单株有效角1286.4个;产量达到1046kg—1326kg/公顷,与施纯氮276kg的产量差异不显著;杂种不育株率为13％左右,比施氮量为276kg/公顷的不育株率低4.6％—5.0％。 Rape bolting rod strains need to have a strong growth in order to make it more branches and flower buds Kok. The results showed that under the condition of density of 30 000 plants / hectare, with the application of pure nitrogen 207 kg / ha, the number of green leaf before the winter reached 13.7-14.5 and the maximum leaf length reached 37-40 cm. The number of small branches 100 or more, the effective angle of single plant was 1286.4; the yield reached 1046kg-1326kg / ha, which was not significantly different from the yield of 276kg pure nitrogen; the rate of hybrid sterility was about 13% and the specific nitrogen was 276kg / ha Fertility rate of 4.6% -5.0%.