Crested wheatgrass (Agropyron cristatum [L.] Gaertn.) germplasm is available in tetraploid and diploid forms. In addition to rangeland revegetation and forage production, the tetraploid crested wheatgrasses also commonly provide low‐maintenance turfgrass production. It is unknown how well the smaller leaves and plants of the diploid form compare to the tetraploid form for turfgrass production. Herein, we describe the analysis and results from two line‐source irrigation studies to quantify the difference in turfgrass performance across irrigation levels for 10 crested wheatgrass population representing tetraploid and diploid levels. The results were based on growth habit, color, density and quality. We found differences among the trait values among the irrigation levels, among the populations and between the two ploidy levels. Overall, there is substantial variation within the crested wheatgrass germplasm for turfgrass production and quality. The diploid germplasm possesses excellent low‐maintenance turfgrass potential, particularly when greater aesthetics and quality are desired. However, the greater spread and rhizomatous growth habit present in some tetraploid populations suggest great potential for the tetraploid germplasm, particularly when soil stabilization is a primary concern.

中文翻译：

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灌溉量和倍性影响冠小麦草的草皮草潜力（Agropyron cristatum）

凤头小麦草（Agropyron cristatum[L.] Gaertn。）种质有四倍体和二倍体形式。除了牧场的植被恢复和牧草生产外，四倍体冠状小麦草通常还提供低维护性的草皮草生产。尚不知道二倍体形式的较小叶片和植物与四倍体形式的草皮草相比有多好。在此，我们描述了两项线源灌溉研究的分析和结果，以量化代表十倍体和二倍体水平的10个冠状小麦草种群在不同灌溉水平下草皮草性能的差异。结果基于生长习惯，颜色，密度和质量。我们发现灌溉水平之间，种群之间以及两个倍性水平之间的特征值之间存在差异。总体，冠状小麦草种质内部的草皮草生产和质量存在很大差异。二倍体种质具有极好的低维护性草皮草潜力，尤其是在需要更高的美学和质量时。但是，在某些四倍体种群中存在着更大的传播和根茎生长习性，这表明四倍体种质具有巨大潜力，尤其是在土壤稳定是主要问题时。