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与生产中的常规措施 (打顶时除去底脚叶 )相比 ,在打顶时继续保留底脚叶 ,让其自然衰老 ,可以增强打顶后烟株根系的光合产物供应 ,提高根系的代谢活性 ,有利于烟株从生长环境中进一步吸收钾 ;同时由于底部叶片在打顶时含有丰富的钾 ,这部分钾随着叶片后期的正常衰老可以向植株的其它生长中心转运 ,从而提高烟株其它叶片的含钾量和改善烟叶的内在品质。建议生产中在株行距较大 ,通风透光的种植模式下 ,可以考虑打顶时继续保留底脚叶。
Compared with the conventional measures in production (removing the foot-leaf at the time of topping), the foot-leaf remains on the topping for natural aging, which enhances the supply of photosynthate in the roots of the tobacco after the topping and enhances the metabolism of the root system Activity is conducive to tobacco plants from the growth environment to further absorb potassium; at the same time due to the top of the bottom leaf is rich in potassium, this part of the potassium with the late leaves of the normal aging can be transported to other growth centers of plants to improve the tobacco plant The potassium content of other leaves and the intrinsic quality of the tobacco leaf. Proposed production line spacing in the larger, ventilated planting mode, you can consider topping to keep feet feet.