COS——Tobacco
The results show:
(1) COS at low concentrations (0.01mg/L) can promote tobacco plant height elongation, however, high concentration (l00mg/L) inhibited the plant height elongation, the effect of application of two more than a more significant.
(2) 0.01 and 1mg/L COS application of leaf area 2 times all promoting tobacco seedling growth.
(3) 0.01mg/L-1, and 1mg/L-1, chitosan can improve the tobacco seedling root length.