Abstract: Turf fiber implantation can enhance the trample resistance of turf and improve the utilization efficiency of sports turf. However, the effect of fiber implantation on soil carbon sequestration of turf is not clear. In this study, tall fescue (Festuca arundinacea Schreb.) and kentucky bluegrass (Poa pratensis L.) were used as experimental grass species, polyethylene rayon fibers with a depth of 18 cm were implanted at the density of 1 cm×1 cm and 2 cm×2 cm, and the effects of fiber implantation on turf grass growth and soil carbon sequestration were explored. The results showed that the density of 1 cm×1 cm was the best in improving the turf quality and increasing the underground biomass of turf grass and soil carbon content. The underground biomass of tall fescue and kentucky bluegrass increased by 39.4% and 32.8%, respectively, compared with that without fiber implantation. The results showed that the soil carbon increment was the best in the 0-9.0 cm soil layer with the planting density of 1 cm×1 cm, compared with that without planting, the soil organic carbon of tall fescue and kentucky bluegrass increased by 50.1% and 41.1%, respectively;Soil microbial carbon increased by 26.6% and 39.2%, respectively;Total soil carbon increased by 35.6% and 30.5%, respectively. In addition, the maximum soil carbon sequestration rates of tall fescue and kentucky bluegrass were 0.69 t·hm^-2·a^-1and 0.53 t·hm^-2·a^-1, respectively. In conclusion, fiber implantation could promote the growth of lawn roots, significantly increase soil carbon content, and be conducive to soil carbon sequestration.

Key words: Fiber implanted hybrid turf, Turf quality, Soil carbon sequestration, Soil microbial biomass carbon

摘要： 草坪植丝可以增强草坪耐践踏强度，提高运动场草坪的利用效率，然而植丝对草坪土壤碳封存的影响尚不明确。本研究以高羊茅(Festuca arundinacea Schreb.)和草地早熟禾(Poa pratensis L.)为试验草种，采用植丝株间距×行间距为1 cm×1 cm和2 cm×2 cm的植丝密度，植入18 cm深的聚乙烯人造草丝纤维，探究植丝对草坪草生长及坪床土壤碳封存的影响。结果表明：植丝密度1 cm×1 cm在提升草坪坪观质量、增加草坪草地下生物量和土壤碳含量方面表现最佳，其中，高羊茅和草地早熟禾的地下生物量与未植丝相比，分别增加了39.4%和32.8%。在0~9.0 cm土层中土壤碳增量最大，植丝密度1 cm×1 cm与未植丝相比，高羊茅和草地早熟禾土壤有机碳(Soil organic carbon，SOC)分别增加了50.1%和41.1%；土壤微生物碳(Microbial biomass carbon，MBC)分别增加了26.6%和39.2%；土壤总碳(Total carbon，TC)分别增加了35.6%和30.5%。此外，高羊茅和草地早熟禾的土壤固碳速率最大达到0.69 t·hm^-2·a^-1和0.53 t·hm^-2·a^-1。综上，植丝能促进草坪根系生长，显著增加土壤碳含量，有利于土壤碳封存。

关键词: 植丝式混合草坪, 草坪坪观质量, 土壤碳固定, 土壤微生物碳