The rooting and growth of frozen cassava under different chemical treatments were studied.The result has demonstrated that disinfection effect could increase rooting rate and seedling emergence rate of cassava seed stem and decrease the rate of mildew.The sportak treatment could generate better effect(rooting rate and seedling emergence rate were 63%,the mildew rate of stem was 28%).Among different rooting reagents,Genwang+lime treatment generated better effect on rooting rate and emergence rate of frozen cassava than these of other groups and control group.It was concluded from the effects of different rooting reagents on growth of seed stem that Genwang+lime treatment could promote elongation and growth of cassava significantly(the mean plant height of experimental groups inceased 8.58 cm compared with that of control group) while paclobutrazol+lime generated the best effect on crassation of stem(the stem diameter of experimental group increased 0.4 cm compared with that of control group).
