一、种性退化现象 目前,大蒜生产中存在严重的种性退化现象,其表现为:植株日趋矮小,假茎变细,叶色变淡、变小,蒜头变小,小瓣蒜和独头蒜增多,提早枯黄植株增多,产量降低等。造成种性退化的原因主要有三方面:一是大蒜长年用蒜瓣进行无性繁殖,不经 First, the phenomenon of degenerative species At present, there is a serious degenerative phenomenon of garlic production, which is manifested as: plants become increasingly smaller, fake stems thinner, leaf color fades, smaller, garlic smaller, small flap garlic and single head Increased garlic, early yellow plants increased yield decreased. Cause of degenerative species are mainly due to three reasons: First, garlic for many years with garlic for vegetative propagation, without