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首页> 外文期刊>Journal of Turfgrass Management >Relationship between turfgrass quality performance and evapotranspiration rate in cultivars of Kentucky bluegrass.
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Relationship between turfgrass quality performance and evapotranspiration rate in cultivars of Kentucky bluegrass.

机译：肯塔基州早熟禾品种的草皮质量表现与蒸散速率之间的关系。

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摘要

Breeding turfgrasses that combine superior performance with conservative water use patterns is important in maintaining optimum growth potential and functional quality with less water. Morphological characteristics associated with increased canopy resistance to evapotranspiration (ET) and low leaf area are correlated with reduced ET in well irrigated turfgrass. Canopy resistance and leaf area components are also important turf forming properties. The correlation between quality and reduced ET measured under well watered, controlled environment conditions was investigated in 59 Kentucky bluegrass (Poa pratensis) selections maintained under field conditions (in USA) and optimum cultural intensities. Negative correlations were observed between turf quality rating and ET rate (measured at 25鳦 under controlled conditions). Significant correlations were detected between ET rate and quality data from 5 of the 7 USA National Turfgrass Evaluation Program locations evaluated in the study. Correlations ranged from -0.04 (at East Lansing, Michigan, USA) to -0.51 (Adelphia, New Jersey, USA). The general pattern between improved quality and reduced ET rate indicated that P. pratensis cultivars currently available combined both superior performance with conservative water use. It was unlikely that this resulted from breeding for low water use directly.
机译：将优良的性能与保守的用水模式相结合的繁殖草皮对于保持最佳的生长潜力和减少水的功能质量至关重要。在灌溉良好的草坪草中，与冠层对蒸散量（ET）的抵抗力增强和低叶面积相关的形态学特征与ET降低相关。冠层阻力和叶面积成分也是重要的草坪形成特性。在田间条件下（美国）维持的59种肯塔基州蓝草（Poa pratensis）选择和最佳培养强度下，研究了在灌溉充足，受控环境条件下测得的质量与降低的ET之间的相关性。草坪质量等级和ET率之间呈负相关（在受控条件下于25°C测得）。在研究中评估的7个美国国家草坪草评估计划位置中的5个中，检测到ET率与质量数据之间存在显着相关性。相关范围从-0.04（在美国密歇根州东兰辛）到-0.51（在美国新泽西州阿德菲亚）。在提高质量和降低ET率之间的一般模式表明，目前可获得的对虾（P. pratensis）品种将优异的性能与保守的用水结合了起来。这不太可能是由于低水直接繁殖而造成的。

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