Growth response of tall fescue( Festuca arundinacea )and Italian ryegrass( Lolium multiflorum )seedlings was compared
in pot experiment to irrigate with solution containing sea salt
concentrations 3 2,6 4,9 6,12 8,16 0 g·L -1 .The results showed that irrigations with low salt solution had no effects on the growth of both species.At salt concentration greater than 6 4 g·L -1 ,plant height,fresh and dry weights of both species decreased with
increasing salinity.This effect was pronounced on tall fescue than on Italian ryegrass.Compared with the control,irrigations with salt solution increased leaf chlorophyll contents of both species and the relative increase rate in Italian ryegrass was higher than that in tall fescue.The concentrations of Na + in the leaves and stems of both species increased with increasing salt concentration in irrigation water.Increasing salt concentration in irrigation water tend to decrease the concentrations of K + in tall fescue leaves and stems,but to increase those in Italian ryegrass stems.Compared with those of tall fescue,leaves and stems of Italian ryegrass contained higher K + and Ca 2+ concentrations at the same salt concentration.These results indicated that Italian ryegrass seedlings had higher salt tolerance.