Zoysiagrasses (Zoysia spp. Willd.) have been predominately used as turfgrass for residential and commercial lawns in addition to golf course fairways and tees due to reduced input requirements compared with bermudagrass (Cynodon spp.). The recent development of fine-textured zoysiagrass cultivars has sparked interest in using zoysiagrass on putting greens. A complete-factorial field experiment was conducted over replicate trials in Knoxville, TN to evaluate the putting green performance and quality of four zoysiagrass cultivars under two nitrogen (N) rates in the transition zone. Four zoysiagrass cultivars (Lazer, M85, Prizm, and Trinity) were treated with either 0.93 or 1.9 g N m⁻² every 2 wk over a 16-wk period from June to September in 2020 and 2021. Ball roll distance, surface firmness, and turfgrass color were evaluated weekly. Lazer and M85 consistently provided the greatest ball roll distance and turfgrass color over both seasons, whereas Prizm occasionally exhibited similar performance and color. Lazer produced the firmest greens, whereas Prizm exhibited the softest surface. Trinity had reduced turfgrass color over both years, implying that it should not be used on putting surfaces. The 1.9 g N m⁻² rate reduced ball roll distance and increased turfgrass color but had limited effect on surface firmness. Applying 0.93 g N m⁻² increased ball roll distance, reduced turfgrass color, and maintained surface firmness similar to 1.9 g N m⁻². Additionally, cultivar selection will likely affect putting green performance, playability, and quality.

中文翻译：

---

施氮量和品种对过渡带结缕草果岭的影响

结缕草( Zoysia spp. Willd.) 主要用作住宅和商业草坪以及高尔夫球场球道和发球台的草坪草，因为与百慕大草 ( Cynodon spp.) 相比减少了投入要求。质地优良的结缕草品种的最新发展激发了人们对在果岭上使用结缕草的兴趣。在田纳西州诺克斯维尔进行了一项全因子田间试验，通过重复试验评估过渡区两种施氮量下四种结缕草品种的推杆果岭性能和质量。四个结缕草品种（Lazer、M85、Prizm 和 Trinity）用 0.93 或 1.9 g N m ^-2在 2020 年和 2021 年的 6 月至 9 月的 16 周期间，每 2 周进行一次。每周评估球的滚动距离、表面硬度和草坪颜色。Lazer 和 M85 在两个赛季中始终提供最大的滚球距离和草坪颜色，而 Prizm 偶尔会表现出相似的性能和颜色。Lazer 产生了最坚硬的果岭，而 Prizm 则呈现出最柔软的表面。两年来，Trinity 的草坪草颜色都变淡了，这意味着它不应该用于推杆表面。1.9 g N m ^-2的用量减少了球的滚动距离并增加了草坪草的颜色，但对表面硬度的影响有限。施用 0.93 g N m ^-2增加了球的滚动距离，减少了草坪草的颜色，并保持了类似于 1.9 g N m ^{-2的表面硬度}. 此外，品种选择可能会影响推杆果岭的性能、可玩性和质量。