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Treating the seedlings of Machilus chekiangensi and Machilus leptophylla with different salt treatment 0%、0.1%、0.2% and 0.3% NaCl solution of four levels, The results showed that: Machilus chekiangensi could live in the slight salt stress without affecting on its normal growth, it wouldn’t show the evidence obviously. However, Machilus leptophylla couldn’t live better in the slight salt stress (0.1%) a long time. With the increasing of salinity concentration and delaying of salt stress time, the time of appearing stress symptoms was shorten. Height growth and ground diameter growth showed a downward trend, Membrane permeability, malondialdehyde (MDA), proline content and soluble sugar content increased, Fv/Fm value declined. It can be known: Machilus chekiangensis could live medium saline alkali soil favorablely and showed the strong salt-resistant ability, Compared with Machilus chekiangensis, Machilus leptophylla has less salt resistance.
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