Screening the Varieties and Determining the Differential Indexes on Heat Tolerance in Germination Period of Cucumber

摘要

Four cucumber varieties of different ecological types were used in this experiment. Measure the indexes such as germination energy, germination percentage, coefficient of germination under 28℃, 35℃ ,40℃ ,42℃ ,45℃. The results showed that germinating ability drops as temperature is going up, 45℃ is the upper limit , coefficient of germination under 42℃ may be differential index on heat tolerance in germination period of cucumber seed. Take use of the temperature index , approbate the heat tolerance in germination period , make a result that some varieties ' coefficients of germination are higher at 42℃ such as 217,1058 - 1 ,631 - 1 ,325, jizao 3 ,bailvjie , yinxing etc. These varieties are materials with better heat resistance in germination period of cucumber.