不定根对去顶烤烟生理指标及物质积累的影响

摘要

Pot experiments with hydroponics were carried out to study the effect of adventitious root on the chlorophyll content ,nitrate reductase activity and the content of nitrogen ,potassium ,nicotine in K326 flue-cured tobacco after multi-topping .The results showed that the chlorophyll content ,nitrate reductase activity and the content of nitrogen ,potassium ,nicotine were greatly enhanced after adventitious root induced by flower mud .It indicated that adventitious root could absorb more nutrients and promote grow th of tobacco .Comparing with other treatments ,the effect of adding nutrient solution directly to the flower mud was the best , especially in the chlorophyll content ,nitrate reductase activity and the content of nitrogen ,potassium from cultured plants ,and the content of nicotine was appropriate .%以烤烟品种K326为试验材料，采用水培的方法研究不定根对去顶烤烟叶绿素含量、硝酸还原酶活性及烟叶中氮、钾、烟碱含量的影响。试验结果显示，通过花泥块诱导产生不定根后，烟叶中叶绿素含量、硝酸还原酶活性及氮、钾、烟碱含量都有很大的提高。说明不定根的产生能使烤烟吸收更多的营养物质从而促进其生长发育，特别是在花泥块上直接加营养液的处理表现最优，即叶绿含量最高，硝酸还原酶活性最强，氮、钾含量最高，烟碱含量适中。