高粱是对低温最敏感的农作物之一。多数高粱生长的最低温度为16℃左右(Rhykerd等,1970;Doggett,1970)。Stoffer等(1960)提出以18℃做为高粱种植的下限温度。因为目前高粱种植区越来越偏北,或地势越来越高,所以低温、特别是夜间温度常限制其正常生长。为了扩大高粱在较冷地区的利用,或延长高粱 Sorghum is one of the most sensitive crops to low temperatures. The lowest temperature for most sorghums is about 16 ° C (Rhykerd et al., 1970; Doggett, 1970). Stoffer et al. (1960) proposed a minimum temperature for planting sorghum at 18 ° C. Because of the current more and more northerly sorghum growing areas, or higher and higher terrain, so low temperature, especially the night temperature is often limited to its normal growth. In order to expand the utilization of sorghum in colder areas or to extend sorghum