在花椰菜定植缓苗后、莲座期和花球膨大期用放射性同位素~（１４）Ｃ进行整株标记，以后定期取样，测定样本各部位的放射性强度。结果表明，缓苗后叶片的同化产物主要用以长新叶和扩大营养器官，对花球膨大的作用较小，莲座期叶片的同化产物向花球运送的量比缓苗后的植株要多，花球膨大期的同化产物占花球干物质的绝大部分，对花球膨大的作用最大。 After cauliflower colonization, the whole plant was labeled with radioactive isotope ~ (14) C during rosette and bulge stage, and then periodically sampled to measure the radioactivity intensity of each part of the sample. The results showed that the assimilation products of leaves after Huanmiao were mainly used to grow long new leaves and expanded vegetative organs, and had less effect on the bulge of flower bulbs. The amount of assimilation products from leaves during rosette stage was larger than that after Huanmiao seedlings , The hyperbolic period flower assimilation product accounting for the vast majority of flower dry matter, the largest role in the expansion of the flower ball.