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首页> 外文期刊>Journal of Turfgrass Management >Racetrack assessment by penetrometer. Part II. Application of the model.
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Racetrack assessment by penetrometer. Part II. Application of the model.

机译：渗透计评估赛马场。第二部分模型的应用。

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摘要

Turf racetrack traction is mainly a function of bearing strength of the underlying soil. The relationship between the penetrometric index of bearing strength and traction, reflected in times run by horses, differs with soil type and soil water content. A hyperbolic model was used to relate penetrometer index to race times for 2300 races on 29 racetracks in New Zealand. The model normalised all data to a standard 1400 metre race. Adjustments were made to account for the effect of racetrack configuration, soil type, class of horse, distance and the effect of rain on three main parameters: m-the winners time for a standard race (83.45 s) expected on an ideal (best traction) track; a-the penetrometer index (2.40 cm for the standard race) above which times increase; and b-the maximum increase in time (standard of 2.78 s/cm) for a unit increase in penetration. The tuning point parameter, a, and the slope parameter, b, were fitted as a base value for the standard racetrack plus a linear combination of soil characteristics. An adjustment was fitted to account for the influence of rain. Penetrometer output was calibrated for each track under reference traction conditions. All 29 racetracks can now release information on a national track condition scale.
机译：草坪赛道的牵引力主要是下层土壤的承载力的函数。乘以马的时间反映的承载强度和牵引力的渗透率指标之间的关系因土壤类型和土壤含水量而异。使用双曲线模型将渗透度计指数与新西兰29个赛道上2300场比赛的比赛时间联系起来。该模型将所有数据归一化为标准的1400米比赛。进行了调整，以考虑到跑道配置，土壤类型，马匹级别，距离和降雨对三个主要参数的影响：m-理想（最佳牵引力）下标准比赛的获胜者时间（83.45 s） ）跟踪;透度计指数（标准种族为2.40厘米），高于该指数时，时间会增加; b-穿透力增加的最大时间增加量（标准为2.78 s / cm）。调整点参数a和坡度参数b被拟合为标准跑道的基本值以及土壤特性的线性组合。进行了调整以解决降雨的影响。在参考牵引条件下针对每个轨道校准了渗透仪的输出。现在，所有29条赛道都可以发布全国赛道状况量表的信息。

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