甘薯新品种济薯18号夏薯高产生理基础研究

Research on Physiologic Foundation of High Yield in Sweetpotato c. v. Jishu No. 18

本研究以徐薯18为对照,对甘薯新品种济薯18号夏薯不同生长阶段的地上部、地下部生长动态进行了初步探讨。结果表明,济薯18号与对照相比叶片功能强,地上部茎叶前期生长快,后期不早衰;叶面积系数接近最佳值;净光合速率高;光合产物由地上部向块根转移较早、较快;薯块膨大早,速度快。

The growth trends of vine and tuber in different developmental stage of sweetpotato cultivars Jishu No. 18 were preliminarily studied. The results showed, compared with control, Jishu 18 had the following characteristics: strong leaf function, such as vine growing quick in the early stage and debilitating slow in the late stage, leaf area coefficient near the most suitable, high net photosynthetic rate and photo-synthetic product transferring earlier and sooner from vine to tuber; Furthermore, the tuber development of Jishu No. 18 were earlier and sooner.