草种组合与坪床结构对城市绿地草坪耐践踏性的影响OA

Trampling resistance is crucial to the ornamental and recreational functions of turf.Selecting appropriate grass species and improving the structure of the turf-bed are important measures for enhancing the trampling resistance of turf.This study,in consideration of the unique cold and arid climate of Xining City,used the Kentucky bluegrass(Poa pratensis) varieties'Euromyth'and'Action',the tall fescue(Festuca arundinacea)varieties'Essential'and'Airlie',and the red fescue(F.rubra)varieties'Reverent'and'Maximal'as experimental materials to explore the effects of different grass species combinations and fiber-mixed turf-beds on the trample resistance of turf.Original soil and fiber-mixed turf-beds were set up as part of the experiment.Indicators such as turf quality,root morphology,biomass,and movement performance were measured following no trampling,light,and moderate trampling treatments.The results showed that under light trampling,the combinations of Kentucky bluegrass꞉tall fescue꞉red fescue=3꞉1꞉1 and Kentucky bluegrass꞉tall fescue꞉red fescue=1꞉1꞉3 combined with a fiber-mixed turf-bed had the best overall performance.Normalized difference vegetation index(NDVI)increased by 7.76％and 8.01％,respectively;root surface area increased by 26.63％and 17.69％,respectively;and aboveground biomass increased by 31.46％and 79.69％,respectively.Under moderate trampling,the combination of Kentucky bluegrass꞉tall fescue꞉red fescue=3꞉1꞉1 combined with a fiber-mixed turf-bed had the best overall trample resistance performance.NDVI increased by 13.50％,root volume increased by 292.42％,and coverage rate increased by 12.11％.The membership function analysis showed that the combinations of Kentucky bluegrass꞉tall fescue꞉red fescue=3꞉1꞉1 and Kentucky bluegrass꞉tall fescue꞉red fescue=1꞉1꞉3 had strong trample resistance,with the former being superior to the latter.This study suggests that the combination of Kentucky bluegrass꞉tall fescue꞉red fescue=3꞉1꞉1,supplemented by a fiber-mixed turf-bed structure,is suitable for park green spaces in Xining City,providing a theoretical and practical basis for turf establishment in cold and arid regions.