Comparison of Turfgrass Density, Uniformity and Tiller Characteristics in Mixtures of Overseeded Warm-Season and Cool-Season Grasses
2017
Kim, K.N., Sahmyook University, Seoul, Republic of Korea
The study was initiated to evaluate the effects of overseeding warm-season grass (Zoysia japonica Steud.) with coolseason grasses (CSG) on turfgrass density, uniformity and tiller appearance and to determine turfgrass species and seeding rate applicable for a practical use. Treatments were comprised of Kentucky bluegrass (KB, Poa pratensis L.), perennial ryegrass (PR, Lolium perenne L.), tall fescue (TF, Festuca arundinacea Schreb.) and their mixtures. Overall turfgrass density and uniformity were much better with the overseeded treatments over the control. In early stage after overseeding, the greater the PR in treatments, the greater the turfgrass density and uniformity. But the higher the KB, the lower the density and uniformity. From the middle-stage evaluation, however, we observed the opposite results as compared with early-stage findings. Accordingly, the KB was highest in turfgrass density and uniformity, while the PR lowest. In regards of mixtures, both turfgrass density and uniformity were better with increased KB and decreased PR in overseeding rates. As for a medium-quality mixtures of Korean lawngrass with CSG, it would be the best choice to apply with KB at 50 g m−² and equal combination of KB, PR and TF by 1/3 in mixing at 75 g m−² in terms of sustainable density and uniformity
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