有限生长类型番茄营养枝生理作用的研究

Studies on the Physiological Efi'cct on Nutritive-shoot of Determinate Tomatoes

有限生长类型番茄品种‘北京10号’(生长势弱)和‘早丰’(生长势强)保留主枝第一花序下第二侧枝作营养枝,植株生长快,叶面积大,根系活力强,光合强度高,^(14)C光合产物向果实和根系的分配率高,早期产量和总产量增加。与对照相比,‘北京10号’营养枝上留3～4片叶摘心,早期产量提高8.8％～13.8％,总产量提高7.5%～5.8％,‘早丰’营养枝上留2～3片叶摘心,早期产量提高4.8％,总产量提高11.9％～8.5％。放任营养枝生长造成减产。

In the trials with two determinate tomato cullivars-Beijing No. 10(vigourlcss growth) and Zao fcng (vigorous growth), the second lateral branch below the first inflorescence on the main stem was kept as a nutritive-shoot .The results showed that plant with nutritive-shoot grew fast and had a large leaf arcs ,a strong root activity, a high assimilation rale and distribution ratio of I4C photosynthctic products to fruit and root, and both early yield and total yield increased as compared with the control, whose nutritive-shoot was removed.Beijing No. lOvvith 3-4 leaves in nulrilivc-shoot increased the casly yield by 8.8%-13.8%,and total yield by 7.5%-5.8%,whilc Zao fcng with 2-3 leaves in nutritive-shoot increased the early yield by 4.8% and total yield by 11.9%-8.5% as compared with the control. If the nulrilivc-shoot was allowed to grow freely, the yield would decrease.