| The Chinese lovage is prepared from three original plants, i.e. Ligusticum sinense Oliv., Lingusticumjeholense Nakai et. Kitang and Coniosenium vaginatum Thell, and is widely used for the treatments ofcommon cold and rheumatic arthralgia. Previously, the herbal medicine is mainly from the wild sources andit has become rare species due to intensive collection, thus making that it is necessary to cultivate this plant.In this study, the effects of cloning of Ligusticum jeholense; debud and other agronomictechnologies for increasing production and different bionic cultivation models on the growth anddevelopment, vegetative characters, and the root yield were observed. And the effect of different cultivationand management techniques on the quality of Chinese lovage was investigated as well.The results showed that roots are the main reproductive material of Ligusticum jeholense Nakai et.Kitag, with the root size of over 5cm×5cm×3cm with two root buds being the best. The cutting is the veryimportant procedure for increasing propagation coefficient. Taking the low middle part of columnal withone piece of mature leaf as transplant material and treated with 500-1000ppm IBA, the time for rootemerging is short, and rate of root emerging is the highest.During the bud stage, plucking the progressive flower buds, the medical material characters andproductive characters were better; the treatment removing all inflorescence had a greatest advantage and ahigher production.When treated with different concentration of Paclobutrazol, the plants treated with 100ppm of thechemical had more advantages than other treatments, stem thickness, leaf area, leaf age, etc weresignificantly higher than other treatmentsThe comparison between different cultural models, indicated that illumination intensity was the majorecological factor affecting the growth and development of plant. With increasing illumination intensity; thegrowth of the plants was fast. The numerical value was higher, and its arborization numbers, leaf area andthe cyme number had more advantages than others. When the illumination intensity was low, the plantbecame taller. Comparing the different cultural models, the plant height, LAI and cyme number had anannual variation with curve "s", and arborization number has a annual variation with curve "double s". Thegrowth showed that cultural model-1(farmland model) developed rapidly. With the deducing of intensity of illumination, the treatments developed slowly. The study on the different cultural models showed that: theconditions of illumination are not only the major factor to influence on the bloom, but also the production.When the Transmittance is 70％; the Ligusticum jeholense had a higher yields.The different cultivation measures had significantly effect on quality of the medicinal material. Pluckingthe total flower buds or the part flower buds was beneficial for the accumulation of volatile oil, Ethanolextracts and Ferulic Acid. The treatment A, removing all flowers was higher than other treatments and CK.During the bud stage, spurting the different concentration of Paclobutrazol could improve the quality ofthe medicinal material, The treatment with 300ppm increased the contents of volatile oil, ethanol extractsand ferulic acid, which is come up to the standard of《China Pharmacopoeia》.In the different cultural models, the resistance of the plant in model 1 (rain fed with full sunshine) wasweak; the incidence of powdery mildew and red mite and other diseases and Pests was higher than othermodels. Other models had a better resistance, the incidences of diseases and pests were rare. Practically, theoptimal model could be selected according to the different local conditions. Once the growing model isselected, technical measures such as debuding, spurting the different concentration of Paclobutrazol, andother agronomic technology can be used to increase production, thus improving the production and qualityof the Medicinal material.
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