Abstract:

Abstract: Zihuabai was used to do an experiment which researched the effects of nitrogen on physiological and biochemical characteristics of potato under NaCl stress in vitro. The results showed: the content of praline、 chlorophyll、protein and root activity performed increasing at first,then decreasing with the increase of nitrogen level，and reached the top in 4.17（N2）mmol/L NH4NO3 level. The content of chlorophyll、protein and root activity were significantly higher than that of the contrast in N2 level; The activity of SOD and POD increased generally under NaCl stress with the increase of nitrogen level，and reached the top in 6.25（N2）mmol/L NH4NO3 level.