Research On Drought Resistance Of New-introduced Sugarcane Varieties

Research was done on drought resistance indexes, such as physiological character, agronomical character, yield and technical character of two new-introduced sugarcane varieties, ROC25 and Y.T.93/159 under water-controlled conditions, and two other sugarcane varieties, namely, ROC 16 and G.T. 11 were taken as the control varieties. The results show that the drought resistance of ROC25 and Y.T.93/159 are inferior to that of ROC 16 and G.T. 11 . Under the conditions of drought stress, the yield loss rate of ROC25 and Y.T.93/159 are 19.02% and 21.44% respectively , and the sucrose loss rate are 9.77% and 13.55% respectively. The results also show that ROC25 is a drought-stress-sensitive sugarcane variety, and Y.T.93/159 is a drought-stress-inactive one.