Effects of NaCl Stress on Ions Absorption and Transportation and Plant Growth of Tall Fescue

The absorption and transportation of inorganic ions and growth of Tall Fescue were studied in a hydroponics experiment. The results showed that, (1) NaCl stress reduced the number of K+ contents, K+/ Na+ and Ca2+/ Na+ ratios in shoots and roots, and dry weights of Tall Fescue, but increased Na+ and Cl- contents, and enhanced the selectivity of Cl--Na+ and K+-Na+; (2) The increments of Na+ and Cl- contents in shoot were higher than those in roots, the increment of Cl- contents were more than that of Na+ contents, and the Cl-/ Na+ ratios were almost 1.6 in shoots and about 0.8 in roots; (3) NaCl stress time affected the K+ and Na+ contents significantly and reduced the transportation selectivity ratios of K+ and Na+, but NaCl concentration mainly influenced the absorption ratios of K+ and Na+; (4) NaCl stress inhibited the growth of shoots more severely than that of roots, and the stress effect of Cl- was more significant than that of Na+.