入侵植物斑地锦浸提液对几种蔬菜的化感作用研究

为了深入理解斑地锦对入侵地作物的危害及其入侵机制，本研究用蒸馏水浸提斑地锦茎叶内地有效成分，以番茄、辣椒、苋菜和荆芥为受体，利用培养皿滤纸法研究斑地锦浸提液对种子萌发和幼苗生长的影响。结果表明，斑地锦浸提液可降低四种蔬菜种子的发芽速率，抑制番茄、辣椒和荆芥的发芽率，并且这种抑制作用随处理浓度的提高而加强，而对苋菜种子的发芽率无显著影响；0.4 g/ml的斑地锦浸提液强烈抑制了四种蔬菜根的生长，却不同程度地促进了辣椒、荆芥和苋菜茎的生长，对根/茎比的影响与对种子发芽率的影响类似。

Allelopathic Effects of Aqueous Extracts from Euphorbia maculata on Several Vegetable Species

For comprehensive understanding the harm of Euphorbia maculata to native species and its invasive mechanism, it were conducted that the allelopathic effects of aqueous shoot extracts from Euphorbia maculata on seed germination and seedling growth in four vegetable species. The results showed aqueous shoot extracts of Euphorbia maculata could inhibit seed germination speed in all the four species, reduce seed germination rate in Lycopersicon esculentum, Schizonepeta tenuifolia and Capsicum frutescents, and its effects increased with the increase of extracts concentration, while having no effects on seed germination of Edible umaranth. High concentration (0.4g/ml) of extracts of Euphorbia maculata intensively inhibited root growth in all four species, while it stimulated shoot growth in Edible umaranth, Capsicum frutescents and Schizonepeta tenuifolia, and showed same influencing pattern on root/shoot rates as seed germination speed.