Influence of various ventilation methods on the growth and athletic quality of Kentucky bluegrass lawns

A comprehensive study was undertaken to determine the most effective ventilation conditions for Kentucky bluegrass (Poa pratensis) lawns. This investigation involved eight ventilation methods, encompassing two initiation temperatures (30 and 35 ℃) and four wind speeds (1, 2, 3, and 4 m·s⁻¹), to assess their impact on the turf quality, growth characteristics, photosynthetic properties, and athletic quality of Kentucky bluegrass lawns. Results revealed that ventilation significantly lowered canopy and soil temperatures yet exhibited limited influence on soil humidity. Relative to the control group (no ventilation), diverse ventilation methods exhibited distinctions in turf quality, growth characteristics, photosynthetic features, and athletic quality of Kentucky bluegrass lawns, with notable superior performance observed in the T₃₀-WS₂ (30 ℃, 2 m·s⁻¹) method. Holding the ventilation initiation temperature constant, the turf quality and photosynthetic features of Kentucky bluegrass lawns demonstrated a trend of initial increase followed by a subsequent decrease with rising wind speed. At the same time, growth characteristics exhibited variability at different ventilation initiation temperatures. At identical wind speeds, experimental indicators at lower ventilation initiation temperatures tended to be lower than those at higher initiation temperatures, albeit with fewer statistically significant differences. To conclude, commencing ventilation at 30 ℃ with a wind speed of 2 m·s⁻¹ established optimal conditions for Kentucky bluegrass lawns.