Determination of saponin Ⅰ in extracts of Allium macrostemnon Advances in the Study of Allium macrostemon Bunge Discovery of Heptaploid Allium macrostemon in Daluo Mountain,Zhejiang and the Preliminary Analysis on Its Formation Mechanism Transformation of EPSP Synthetase Gene from Allium macrostemon Bunge into Tobacco and Improvement of Resistance in Transgenic Phants Research on allelopathic effects of Allium macrostemon on three main weeds (Digitaria sanguinalis, Echinochloa crusgalli and Amaranthus retroflexus) in peanut fields