草垫植入对混合草坪坪床稳定性和表观质量的影响

Effect of carpet mesh implantation on hybrid turf stability and performance quality

为研究人造草垫式混合草坪中不同的人造草垫对草坪表观质量和稳定性的影响,以多年生黑麦草品种“名仕”为研究材料,以无草垫处理为对照,研究了3种人造草垫植入对草坪表观质量、地上地下生物量和根系参数(根长、根表面积、根体积和根活力)的影响,并通过直剪试验对坪床稳定性进行测定。结果表明:各草垫处理均降低了草坪的色泽、归一化差异植被指数和密度,生长至116 d时,3个草垫处理组的密度分别比对照组降低了20.8%、8.7%和14.7%,有背衬的草垫结构增加了草坪草的均一度;同时,草垫处理降低了草坪草的地下生物量、根系长度、根总表面积和根系总体积,影响了垫上和垫下部分的根系活力。草垫处理增加了混合系统的抗剪强度和表面硬度,3个草垫处理组分别比对照组的内聚力增加了51.9%、162.7%和134.6%,硬度分别比对照组增加了34.6%、32.8%和45.8%。因此,人造草垫式混合草坪中,各种草垫在不同程度上抑制了根系生长,进而影响地上部分的生长和表观质量;人造草垫式混合系统稳定性高于天然草坪,且有背衬结构的草垫对提高坪床稳定性的效果更为明显,草垫对提高草坪的强度有积极作用。

This research studied the effect of carpet mesh implantation on carpet mesh hybrid turf performance and soil-bed stability.The grass species used was perennial ryegrass(Lolium perenne cv.Neruda 1BT).Treatments comprised a control with no carpet mesh and comparison of three carpet mesh types(A,15 mm×15 mm mesh with no backing;B,30×30 mm mesh with backing;C,20 mm×12.5 mm mesh with backing)implanted below the soil surface,in foam boxes 35 cm×23 cm in area and 19 cm deep,and filled with pure sand predominantly 0.1-0.5 mm particle size.Measurements included aboveground and underground biomass,root morphological parameters(root length,root surface area,root volume and root vigour),and testing of the soil-bed stability of the hybrid turf using a direct shear test.It was found that carpet implantation significantly decreased turfgrass performance,with decline in color,NDVI and density.The density decline with implantation of the three carpet types at day 116 from planting was 20.8%,8.7%and 14.7%at the 116th day,for carpet mesh types A,B and C,respectively.However,carpet types with mat(B and C)increased the turfgrass uniformity.Furthermore,compared with the control,carpet implantation decreased the underground biomass,root length,root surface area and root volume,and also compromised root vigour,both above and beneath the carpet.Carpet implantation did increase the turf shear strength(by 51.9%,162.7%and 134.6%,for mesh types A,B,and C,respectively),surface firmness(by 34.6%,32.8%and 45.8%,for mesh types A,B,and C,respectively),and increased cohesion compared to the control.In summary,in the artificial-natural hybrid turf,the carpet implantation inhibited the growth of roots,which compromised the aboveground growth of the turf grass and turf performance.Carpet implantation,especially carpet with mat,did increase the mechanical stability of the hybrid turf.