ABSTRACT
Objective:To study the change of soil environment and yield of <italic>Angelica sinensis </italic> when cultivated on the film side and and open field sides，and to explore the influence of garlic volatiles and film-side cultivation on continuous cropping <italic>A. sinensis</italic>，so as to provide some certain theoretical basis for the saying that the <italic>A. sinensis</italic> garlic intercropping mode and film-side cultivation could alleviate continuous cropping <italic>A. sinensis</italic>. Method:In this study， the effects of garlic on soil environment and yield of <italic>A. sinensis</italic> cultivated on film side and crop rotation were discussed through the determination and analysis of soil microorganism quantity，soil enzyme activity and yield of Angelica sinensis in the rhizosphere of <italic>A. sinensis</italic>. Result:The number of bacteria and actinomycetes in the rhizosphere soil of <italic>A. sinensis </italic>increased significantly， while the number of fungi decreased significantly. Among them， the number of bacteria and actinomycetes in the intercropping of <italic>A. sinensis</italic> and garlic on the film side increased by 104% and 146.89% on average as compared with that of the control （monoculture under continuous cropping open field），and the number of fungi decreased by 39.28% on average as compared with that of control group. When the enzyme activity in the rhizosphere soil was significantly increased under the condition of intercropping with garlic on the film side，the soil urease，sucrase，alkaline phosphatase and acid phosphatase activities under the intercropping of <italic>A. sinensis</italic> and gralic on the rotation film side were increased by 61.60%，51.09%，203.48% and 76.19% respectively as compared with those in control group. The yield of <italic>A. sinensis</italic> significantly increased under the condition of intercropping with garlic on the film-side，and the yield of Angelica sinensis under the rotation film-side intercropping with garlic increased by 39.37% as compared with that of control group. Conclusion:Under the mode of film-side cultivation，the interplanting of <italic>A. sinensis </italic>with garlic can change the number of soil microorganism，improve the activity of soil enzyme，improve the physical and chemical properties of soil， alleviate the obstacle of continuous cropping and guarantee the healthy growth of <italic>A. sinensis</italic> more effectively.
ABSTRACT
Objective:To explore the allelopathic effect of garlic volatiles on Angelica sinensis by studying the allelopathic effect of both living garlicand isolated garlic sprout volatiles on A. sinensis, and provide certain theoretical basis for Angelica garlic interplanting mode to alleviate the stress of continuous cropping A. sinensis. Method:Through the determination and analysis of the growth indexes and leaf protective enzyme system of A. sinensis，the adaptability of A. sinensis to continuous cropping stress and non-continuous cropping stress environment under the influence of the volatiles of living garlic and isolated garlic sprout as well as the mechanism of resistant growth and development were discussed. Result:The overall analysis showed that the growth index and leaf protective enzyme activity of isolated garlic sprout with alleloinductive treatment（DC2）under continuous cropping stress were increased by 17.51% and 48.34% respectively as compared with those under single cropping（CK1）. The growth index and leaf protective enzyme activity of angelica under continuous cropping and intercropping（LC2）were increased by 16.63% and 36.65% as compared with those under monocrop cropping（CK2）. Those indicated that the volatiles of isolated garlic sprout had more significant effect than those of live garlic on alleviating the stress of continuous cropping of A. sinensis. Conclusion:Regardless of the presence of continuous cropping obstacle，appropriate concentrations of living garlic and isolated garlic sprout volatiles had an allelopathic promoting effect on angelica root growth index and leaf protective enzyme activity，and the effect was more obvious in continuous cropping stress conditions，so intercropping garlic has a certain role in alleviating angelica's continuous cropping stress.