The pretreated Suaeda salsa seedlings were transferred to Hoagland Suspension mixed with different concentration of NaCl and N. The result showed that the combined effect of NaCl and N on the seedlings is significant (P < (0.05)). N had little effect on seedlings growth in low salt stress. However, N can alleviate the stress and promote seedlings growth significantly in strong stress. With an increase of NaCl concentration and N content, proline content increased and soluable sugar content in leaves decreas...