Warm‐season turfgrasses, especially hybrid bermudagrass (Cynodon dactylon (L.) Pers × Cynodon transvaalensis Burtt‐Davy), continue to be widely used on golf course putting greens in tropical and subtropical climates globally and are also gaining popularity in the transition zone region of the United States. Hybrid bermudagrass produces a high‐quality putting green surface; however, it has relatively poor shade and cold tolerance. Recently, fine‐textured zoysiagrass (Zoysia spp.) cultivars have been released and may be another potential option for golf course putting greens, especially since zoysiagrass is generally considered more shade tolerant than bermudagrass. “Lazer (DALZ 1308)” zoysiagrass (Zoysia matrella (L.) Merrill × Zoysia minima (Colenso) Zotov) is a new, fine‐textured zoysiagrass that may have the potential to produce high‐quality putting green surfaces in transition zone environments. The objective of this 2‐year field trial was to compare Lazer zoysiagrass to TifEagle bermudagrass under varying light levels (0%, 20%, 40%, 60%, and 80% shade) and management practices to determine the minimum daily light integral (DLI) requirements and surface playability characteristics (ball roll distance and surface firmness) for each species. Species plots were split with two mowing heights (2.5 and 3.2 mm) and further split with or without weekly applications of the plant growth regulator, trinexapac‐ethyl. Lazer demonstrated significantly greater shade tolerance than TifEagle. The minimum DLI requirement for Lazer was generally about 10 mol m−2 day−1 less than TifEagle. Surface firmness was also greater for Lazer zoysiagrass, while TifEagle consistently produced greater ball roll distances than Lazer. Results from this trial demonstrate that Lazer zoysiagrass can produce acceptable putting green conditions and is better adapted than TifEagle to moderate shade conditions.

中文翻译：

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遮荫、切割高度和植物生长调节剂对百慕大草和结缕草果岭的影响


暖季草坪草，尤其是杂交百慕大草（Cynodon dactylon （L.） Pers × Cynodon transvaalensis Burtt-Davy），继续广泛用于全球热带和亚热带气候的高尔夫球场推杆果岭，在美国过渡区也越来越受欢迎。杂交百慕大草可产生高质量的推杆果岭表面;然而，它的耐阴性和耐寒性相对较差。最近，质地细腻的结缕草 （Zoysia spp.） 栽培品种已经发布，可能是高尔夫球场推杆果岭的另一种潜在选择，特别是因为结缕草通常被认为比百慕大草更耐阴。“Lazer （DALZ 1308）” 结缕草 （Zoysia matrella （L.） Merrill × Zoysia minima （Colenso） Zotov） 是一种新的、质地细腻的结缕草，有可能在过渡区环境中产生高质量的推杆果岭表面。这项为期 2 年的田间试验的目的是比较不同光照水平（0%、20%、40%、60% 和 80% 阴影）和管理实践下的 Lazer 结缕草和 TifEagle 百慕大草，以确定每个物种的最低日光积分 （DLI） 要求和表面可玩性特性（球滚动距离和表面硬度）。物种地块以两个割草高度（2.5 和 3.2 毫米）分开，并在每周施用或不每周施用植物生长调节剂 trinexapac-ethyl 的情况下进一步划分。Lazer 表现出比 TifEagle 更好的耐荫性。Lazer 的最低 DLI 要求通常比 TifEagle 低约 10 mol m-2 day-1。Lazer 结缕草的表面硬度也更高，而 TifEagle 始终产生比 Lazer 更大的滚球距离。 该试验的结果表明，Lazer 结缕草可以产生可接受的推杆果岭条件，并且比 TifEagle 更适应适度的阴凉条件。