Soil salinization is a serious threat to the sustainable development of turfgrass

and breeding and planting salt-tolerant turfgrass can improve and utilize large area of saline soil. The effects of NaHCO

3

stress at different concentrations (0

0.2%

0.4%

0.6%

0.8% and 1.0%) on the physiological and ecological characteristics of three types of cold-season turfgrass

including ryegrass (Lolium perenne L.)

tall fescue (Festuca arundi

nacea L.) and kentucky bluegrass (Poa pratensis L.) were studied by pot experiment. The results showed that the turf quality

leaf wilting score

leaf relative water content

leaf chlorophyll content and K

+

content of the three types of cold-season turfgrass decreased with the increasing of NaHCO

3

concentration

and the higher the concentration

the more obvious the decrease. Dry weight of aboveground and roots of the three types of cold-season turfgrass reduced under 0.4%~1.0% NaHCO

3

stress

and with the increasing of NaHCO

3

concentration

the inhibition degree of growth increased significantly

and the inhibition degree of root system was more obvious than that of aboveground parts. The leaf relative conductivity

proline content

malondialdehyde content and Na

+

content showed an increasing trend with the increasing of NaHCO

3

stress concentration

and the higher the concentration

the more obvious the increase. When NaHCO

3

concentration was greater than 0.4%

three types of cold-season turfgrass were damaged. The average value of subordinate function under different concentrations of NaHCO

3

stress followed the order of kentucky bluegrass

>

ryegrass

>

tall fescue

indicating that the resistance of kentucky bluegrass to NaHCO

3

stress was stronger than that of ryegrass and tall fescue.