Study on Determination of Cold Resistance of Cinnamomum platyllum(Diels) Allen and Cinnamomum camphora(L.) Presl with Conductivity Method

To compare Cinnamomum platyllum(Diels) Allen and Cinnamomum camphora(L.) Presl cold resistance,the conductance of electric from Hunan and Jiangsu introduced Cinnamomum platyllum(Diels) Allen and Cinnamomum camphora(L.) Presl determination of cold tolerance.The half lethal temperature was determined through the Logistic equation.The winter survival rate was investigated.The results showed that they were-31.931 8 ℃ for Cinnamomum camphora(L.) Presl leaves and-23.509 8 ℃ for Cinnamomum platyllum(Diels) Allen leaves.The winter survival rate in Xinzheng of Cinnamomum platyllum(Diels) Allen and Cinnamomum camphora(L.) Presl reached 16.7%,and 85.7%,respectively.The cold resistance of Cinnamomum camphora(L.) Presl was better than that of Cinnamomum platyllum(Diels) Allen.