Impact of stitched hybrid systems in hybrid bermudagrass athletic fields

The use of hybrid turf systems is very common in Europe and is increasing in popularity in the United States. Little research was found on the impact of stitched hybrid systems on hybrid bermudagrass ‘NorthBridge’ ( Cynodon dactylon (L.) Pers. × C. Transvaalensis Burtt Davy) athletic fields. A study was conducted to determine the impact of stitched hybrid systems on hybrid bermudagrass performance at the University of Tennessee Center for Athletic Field Safety in Knoxville, TN USA in the fall of 2018 and 2019. A randomized complete block design with four replications was utilized. The study treatments consisted of synthetic fibers spacing stitched in 2 cm by 2 cm, 2 cm by 4 cm treatments, and an untreated control. Each plot received 30 games of simulated traffic events with 12 test variables collected including: percent green cover, surface hardness, head impact criteria, ball rebound, ball roll, angled ball rebound, vertical deformation, energy restitution, force reduction, surface temperature, and rotational and horizontal traction. Results indicated that the only differences among stitched treatments were in rotational traction with the 2 cm by 2 cm treatment having the highest values, increasing the traction for athletic movements. Traffic had a significant effect on green cover, surface hardness, head injury criterion, ball rebound, force reduction, energy restitution, and vertical deformation, regardless of treatment. These findings suggest that the stitched fiber system did not significantly impact hybrid bermudagrass athletic field performance.