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1995年早春,我们对冬发偏旺、生育进程提前的油菜进行了摘顶试验。试验结果表明,摘顶的冬发旺长油菜比不摘顶的平均增产7.8％。摘顶后的增产作用主要体现在增加了有效分枝数和有效角果枝。且摘顶对二次分枝及其角果的促进作用很强。 此外,冬发偏旺油菜摘顶后,还可推迟花期,缩短开花历程。据调查,摘顶处理后始花期、盛花期分别出现在3月30日、4月3日,较对照推迟10天和4天左右,因此在4月3日零下0.7℃的低温影响
In the early spring of 1995, we carried out the top-hatching test on the rapeseed with a strong winter hair and early fertility. The test results showed that the average yield of poplar canopy topdressing increased by 7.8% than that of the top-notched. The effect of yield increase after picking is mainly reflected in the increase of the number of effective branches and the effective branches of pods. And the top of the secondary branches and their role in promoting the fruit is very strong. In addition, the winter hair partial Wang rape picked top, but also postpone the flowering and shorten the flowering history. According to the survey, the first flowering stage and the full flowering stage of the top picking treatment appeared on March 30 and April 3 respectively, which were delayed by 10 days and 4 days compared with the control. Therefore, on April 3, the low temperature of 0.7 ℃