江苏省大麦品种资源的生育期及生态适应性表现

江苏地方农家品种在参试的绝大部分生态点中能够正常抽穗成熟，且抗逆性强，表明品种有较好的适应能力。品种生育期长短主要受温度这个限制因子制约，在冬大麦区与积温成负相关，在春、裸麦区与积温成正相关。江苏农家品种属温敏感型，而对日照的敏感程度则较低、品种中以半冬性或弱冬性类型较多，植株普遍较高，但也有如尺八大麦等具有利用价值的矮源。在春、裸大麦区参试品种株高显著低于原产地江苏点。在春大麦区后期光、温、水等条件对品种灌浆结实有利，品种结实率、单穗粒重及千粒重均高于其它麦区。

Growing Season and Ecological Type of Barley Germplasm Resources in Jiangsu

The local barley of Jiangsu could grow normally in most ecological points and had a high resistance and a good adaptation. The length of growing period was mainly limited by temperature and negative correlation to accumulated temperatnre in winter barley areas and positive correlation to that in other areas. The barley varieties of Jiangsu Were more sen sitive to temperature than to sunline. In general most of varieties studied in this paper were half-winterness or weak -winterness. The plant heights were high and significently higher in Jiangsu areas than in the other areas. The barley setting percentage,grain weight per spike and thousand kernel weight were higher in spring barley areas than in other areas because proper condition was available to filling and seed setting in spring barley areas.