古老的高秆大麦品种由于株形差、营养生长过度以及茎秆易折断、弯曲、倒伏,产量很低。据已有报道,倒伏引起减产达12—66％。近年来,育种家已注意培育半矮秆大麦品种,作为减少倒伏的一个途径。但仅此还不能完全解决倒伏问题。许多工作者已对倒伏进行过研究,并提出不同的植株性状,如根系发育、株 The old tall barley varieties due to poor plant shape, excessive vegetative growth and stems easily broken, bent, lodging, yield is very low. It has been reported that lodging causes a yield reduction of 12-66%. In recent years, breeders have paid attention to cultivating semi-dwarf barley varieties as a way to reduce lodging. But this alone can not completely solve the problem of lodging. Many workers have conducted research on lodging and have proposed different plant traits such as root development,