The effect of salt stress on the growth of 3 species of Nitraria seedlings

In order to compare the salt tolerance of the three species of Nitraria, NaCl with different concentrations was used to stress the Nitraria seedlings. The results showed that salt treatment had different effects on the growth of Nitraria; The inhibiting effect of salt stress on the growth of plant height was in the order of Nitraria tangutorum Bobr>Nitraria roborowskii Kom>Nitraria sibirica Pall; Salt stress caused a rapid decrease in the number of leaves of Nitraria tangutorum Bobr and the number of leaves of Nitraria sibirica Pal rapidly decreased when the salt concentration was greater than 6%, while the relative number of leaves of Nitraria roborowskii Kom significantly decreased when the salt concentration was 15%; With the increase of salt concentration, the order of relative reduction of stem diameter was Nitraria tangutorum Bobr>Nitraria roborowskii Kom>Nitraria sibirica Pall; With the increase of salt concentration, the relative leaf area decreased significantly in the order of Nitraria tangutorum Bobr>Nitraria sibirica Pall>Nitraria roborowskii Kom; With the increase of salt concentration, there was no significant difference between the dry weight and fresh weight of Nitraria roborowskii Kom, but there were significant changes between Nitraria tangutorum Bobr and Nitraria sibirica Pal. According to the comprehensive membership function analysis, the salt tolerance of Nitraria roborowskii Kom was the best, followed by that of Nitraria sibirica Pal, and that of Nitraria tangutorum Bobr was the worst.