Abstract:

Cold tolerance of 30 main rice varieties were identified at sprouting stage and tillering stage by simulating low temperature in climate cabinate, the aim was to screened cold tolerance varieties on delay-type cold damage. The results showed that the difference was more among tested varieties, and screened varieties of high cold tolerance on delay-type cold damage were Longjing16, Longjing18, Longjing22 and Songjing12, of which germinating rate was high under 10 ℃ and delayed days was less after low temperature treatment at tillering stage. The screened varieties could be cultivated by method of direct sowing in paddy.