不同浓度多效唑对辽藁本生长·产量和挥发油含量的影响

目的]为提高辽藁本的产量与质量。方法]研究了不同浓度（100、200、300、400mg／L）多效唑对辽藁本的生长、药材产量、产量构成因素及药材挥发油含量的影响。结果]多效唑对辽藁本有明显的矮化增粗效应，以浓度为400mg／L的效果最为明显，其次为300mg／L；随着多效唑浓度的升高，辽藁本的叶面积指数和叶绿素含量呈现降低趋势；100、400mg／L的多效唑控制辽藁本花量的效果较好；多效唑浓度为100～300mg／L时，可提高辽藁本的产量，有助于挥发油的积累。结论]多效唑浓度为300mg／L时，有利于辽藁本的生长，可提高辽藁本的产量，有助于挥发油的积累。

Effects of Different Paclobutrazol Concetration on Growth Characteristics,Yield and Volatile Oil Contents of Ligusticum jeholense

Objective] The study aimed to improve the yield and quality of Ligusticum jeholense.Method] The effects on the Ligusticum jeholense by different concentration of Paclobutrazol (100、200、300、400 mg/L) were studied, which including growth characteristics, yield, yield composing factors, and the contents of the volatile oil. Result] The Paclobutrazol had an evident thick-dwarfing effect on Ligusticum jeholense, the treatment concentration of 400 mg/L had the most obvious effect, and better than that of 300 mg/L. With the increasing of the concentration of Paclobutrazol, the leaf area index and chlorophyll content of Ligusticum jeholense presented degrade tendency;the treatment concentration of 100 and 400 mg/L had the best effect to control the number of the flowers of Ligusticum jeholense. The treatment concentration from 100 mg/L to 300 mg/L could not only improve the yield, but also made a great help to accumulate volatile oil. Conclusion] The Paclobutrazol concentration of 300 mg/L gave the help of Ligusticum jeholense growth and it could not only improve the yield, but also made a great help to accumulate volatile oil.