Release Route And Allelopathic Mechanism For Allelochemicals Of Artemisia Annua L.

The allelopathy is an interfering to the growth of the neighborhood plant or the microorganism by allelochemicals released through volatilization, eluviation and decomposition of the plant or the root exudates during growth The allelopathy is widely exists in the nature and plays a vital role in the reasonable arrangement crop cultivation system, controlling of the farmland weeds, preventing and controlling crops from disease and insect infection as well as reducing the barrier harm of the succession cultivation.The allelopathy, the allelopathic compounds release approach and the allelopathy mechanism of the Artemisia annua L.,which was a vanguard plant in the farmland community were system and in-depth studied in this paper. The purpose of the research was using the allelopathy among plants to control farmland weed, exploit natural weedicide, reasonably and effective use resources, provide the theory basis for developing the sustainable agriculture. The main results were:1. Triticumaestivum L., Cucumis sativus L.and Raphanus sativus L. were used as receptor plants to study the allelopathy of Artemisia annua L. in this article, and the reason why the Artemisia annua L. is the vanguard plant in the natural ecology was validated. It released the allelochemicals to the environment, producing the strong inhibitory effect to the plants around itself by the volatilization and eluviation of the upside part, especially displayed the strong inhibitory function to the root growth of the receptor plants and also had the inhibitory effect to the growth of young plant. The synthesis inhibitory effect (SE value) of Artemisia annua L. Cucumis sativus L., Triticumaestivum L and Raphanus sativus L. was 47.66. The synthesis inhibitory effect (SE value) to the seeds of three receptor, the length of root and the height of the seedling were 41.10, 74.20 and 66.53 respectively. Both the greenhouse (lab) experiment and the field experiment showed Artemisia annua L. had influence on the seedling height, biomass and the dry matter accumulation of receptor. The results confirmed that the Artemisia annua L. had a high value in exploitation and use. Under the natural condition, the Artemisia annua L. could release allelochemicals to the agriculture ecosystem by the effect of the volatilization and eluviation of the stem and leaf, the decomposition of soil remnant body and the root exudates together. But the Artemisia annua L. released allelochemicals mainly by the volatilization and eluviation of the parts aboveground, secondly by the decomposition of the soil remnant body and the exudates of the...