Allelopathy of ultrasonic extract of garlic plant on different receiver vegetable crops

Authors WANG Chun-hui; CHENG Zhi-hui; NIU Qing; LIANG Jing-na; XUE Shu-hao

Journal Journal of Northwest A & F University. Natural Science Edition , 2009,7:37

Abstract [Objective]A primary study was conducted on allelopathy to explore its mechanism of ultrasonic extracts of three garlic varieties on seed germination and seedling growth of six receiver vegetable crops. [Method] The ultrasonic extracts of three garlic varieties were prepared in five concentrations of 0.005,0. 01 ,0. 02,0. 03 and 0.04 g/mL,and then with tomato,hot pepper,Chinese cabbage,lettuce,cucumber and radish for receiver vegetable crops. The seed germination rate,germination index, seedling length,root length,top fresh weight and root fresh weight of receiver vegetable crops were measured by seed germination bioassy method. [Result] The concentration of three garlic variety ultrasonic extracts showed promotion effects on seedling length and the top fresh weight of radish,but inhibitory effects on root length and root fresh weight; The 0. 04 g/mL of three garlic plant ultrasonic extracts significantly inhibited the seed germination rate,germination index,seedling length,root length and root fresh weight of lettuce and hot pepper; when at the 0.04 g/mL of garlic plant extract ,the ultrasonic extracts of G09 garlic variety significantly inhibited the seed germination rate of radish and lettuce,but had no obvious effects on tomato,Chinese cabbage,hot pepper and cucumber.The intensity of inhibitory effects of three garlic cultivar ultrasonic extracts to seedling growth of different receiver vegetable crops was:G57>G89>G09.[Conclusion]The same concentration ultrasonic extracts of three garlic varieties showed different allelopathic effects on the same receiver vegetable crops and there were differences among different concentrations of the same garlic variety to different receiver vegetable crops.