Despite its popularity as a putting surface in North Carolina, creeping bentgrass (Agrostsis stolonifera L.) is highly susceptible to summer bentgrass decline (SBD) during hot summer months. Cultural practices have been shown to help alleviate the pressure of SBD. The objectives of this study were to detail the impacts of N fertility, soil water content, and hollow‐ and solid‐tine cultivation on creeping bentgrass quality. Cultural treatments included four N rates (97, 195, 293, and 391 kg ha⁻¹ yr⁻¹), four hollow‐tine core cultivation programs (6.4 mm diam. tines two times yr⁻¹, 9.5 mm diam. tines two and three times yr⁻¹, and a non‐cored control), two soil water content levels (low and high), and two summer solid‐tine spiking cultivation treatments (spiked and not spiked). Visual turfgrass quality was measured. A N rate greater than 195 kg ha⁻¹ was needed to maintain acceptable turfgrass quality. High soil water content consistently provided better summer turfgrass quality compared to low soil water content conditions. Nitrogen fertility and soil water content interacted where higher levels of both resulted in the best quality ratings. Hollow‐core cultivation reduced turfgrass quality at the lower N rates; whereas, solid‐tine spiking had no effect on turfgrass quality. Although weather plays a large role in SBD in North Carolina, results from this study show that cultural practices can influence its severity.

中文翻译：

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受气候条件和文化习俗的影响，弯曲的草丛夏季下降

尽管creep草在北卡罗来纳州很受欢迎，但在炎热的夏季，creep草（Agrostsis stolonifera L.）极易受到夏季草草下降（SBD）的影响。事实证明，文化实践有助于减轻SBD的压力。这项研究的目的是详细说明氮肥，土壤水分以及空心和实心栽培对bent草生长的影响。文化处理包括四个氮素含量（97、195、293和391 kg ha ^-1  yr ^-1），四个空心齿核心种植计划（6.4 mm直径的齿，是yr ^-1的两倍，9.5 mm直径的齿，是第二个^-1）。 yr ^-1的三倍，以及无核对照），两种土壤含水量水平（低和高）和两种夏季固穗增高栽培处理（加标和不加标）。测量了视觉草皮草质量。为了维持可接受的草皮质量，需要大于195 kg ha ^-1的速率。与低土壤水分条件相比，高土壤水分始终提供更好的夏季草皮草质量。氮肥和土壤水分相互影响，两者的含量越高，质量评级越高。中空栽培降低了氮素含量，降低了草皮质量。固相加标对草皮草质量没有影响。尽管天气在北卡罗莱纳州的SBD中起着重要作用，但这项研究的结果表明，文化习俗会影响其严重程度。