七十年代初期以来,随着我国中部地区夏播甜菜的发展,“高青顶甜菜”这一变态现象,也在夏播甜菜种植区普遍发生。它不仅由于甜菜的根头伸长,根体变瘦使产量降低,还使甜菜根中的含糖率大幅度下降。我们四年的化验结果是:高青顶甜菜的平均含糖率比正常甜菜降低2.05°S,而高青顶甜菜的青顶部分又比根体部分含糖率低4.67°S(如表1)。 Since the early 1970s, with the development of summer sowing beet in the central region of China, the metamorphosis phenomenon of “high green top beet” has also occurred in summer sowing beet planting areas. It is not only due to the root elongation of beet, thinning the root cause to reduce production, but also greatly reduced the sugar content in beetroot. Our four-year laboratory test results showed that the average sugar content of C. sinensis was 2.05 ° S lower than that of the normal sugar beet and that of the C. chinensis was 4.67 ° S lower than that of the root part ).