The use of native turf mixtures to approach sustainable lawn in urban landscapes.

摘要

Native grasses are excellent candidate species for manipulation to produce dwarf and turf type varieties as well as for producing cultivars with higher attractiveness and requiring less maintenance to be used as a turf grass in arid and semi-arid regions of the world. This investigation was conducted to explore visual qualities of native grasses and their mixtures compared to commercial turf. The field experiment was set out in a split-plot in time based on a randomized experimental design with three replications. We used two native monoculture accessions, perennial ryegrass (Lolium perenne L. 'Yarand') and (Lolium perenne L. 'Shadegan'), Native low-variety Mixture (NM1): consisting of 50% Lolium multiflorum 'Shadegan', 50% Festuca spp. 'Shadegan', Native high-variety Mixture (NM2): consisting of 55% Lolium perenne L. 'Yarand', 35% Lolium perenne L. 'Shadegan', 5% L. multiflorum 'Shadegan' and 5% Festuca spp. 'Shadegan' and compared this with one commercial turf mixture that is commonly used in landscaping. Results indicated the effects of seasons and turf grass types and their interaction had significant effects on most variables including quality, season color, leaf texture, density, quality after clipping (p<0.01). The visual quality measurements indicated the superiority of L. perenne 'Shadegan' over other native monoculture and polyculture and its ablility to compete with the commercial turf. The native turf mixture of NM2 showed several good characteristics. L. perenne 'Yarand' had statistically the lowest score for visual appeal as compared with the other turf types. This research suggests that the use of native grass species of L. perenne 'Shadegan' is worth investigating for better performance of the native landscape.