Vegetation is a key to improving and protecting a new tropical coral island terrestrial ecosystem. Because of their superior ability in adapting poor soil structure and fertility, conserving soil and water and improving the living environment, warm-season turfgrass are considered as important pioneer plants and frequently applied in vegetation construction on tropical coral islands. However, few studies had evaluated the growth of these turfgrass and how these turfgrass influence the soil microbial communities on tropical coral islands. In this study, we conducted a greenhouse experiment and assessed the performance, soil properties and rhizosphere bacterial communities of five typical warm-season turfgrasses species (i.e., Paspalum vaginatium, Paspalum notatum, Cynodon dactylon, Zoysia tenuifolia, and Stenotaphrum helferi) grown on tropical coral sand. Results showed that C. dactylon was superior in the adaptability and turf performance among the studied species, with a turf establishment time of 34 days and a turf quality score of 6.83. Richness of bacterial species and nitrifying bacteria in its rhizosphere soil planted with C. dactylon were also much higher than with other species. The speed of turf establishment was positively correlated with rhizosphere soil bacterial species richness. Our findings indicated that C. dactylon could be a potentially suitable candidate species for vegetation restoration and soil bacterial community conservation on tropical coral islands.

中文翻译：

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模拟热带珊瑚岛环境下五种典型暖季型草坪草的性能及其对土壤细菌群落的影响

植被是改善和保护新热带珊瑚岛陆地生态系统的关键。暖季型草坪草因其在适应贫瘠土壤结构和肥力、保持水土、改善生存环境等方面具有优越的能力，被认为是重要的先锋植物，常用于热带珊瑚岛的植被建设。然而，很少有研究评估这些草坪草的生长以及这些草坪草如何影响热带珊瑚岛上的土壤微生物群落。在这项研究中，我们进行了一项温室试验，并评估了五种典型的暖季草坪草物种（即Paspalum vaginatium、Paspalum notatum、Cynodon dactylon、Zoysia tenuifolia和Stenotaphrum helferi）生长在热带珊瑚沙上。结果表明，C. dactylon在所研究的物种中具有优越的适应性和草坪性能，草坪建立时间为 34 天，草坪质量得分为 6.83。种植了仙人掌的根际土壤中细菌种类和硝化细菌的丰富度也远高于其他种类。草坪建立速度与根际土壤细菌物种丰富度呈正相关。我们的研究结果表明，C. dactylon 可能是热带珊瑚岛上植被恢复和土壤细菌群落保护的潜在合适候选物种。