The effect of soil environment on cultivars compatibility was evaluated in a cutting field experiment during two growing seasons. A factorial combination of four perennial ryegrass (Lolium perenne L.; PR) and three white clover (Trifolium repens L.; WC) cultivars were grown on deep (DSS) and shallow (SSS) soils under irrigated conditions. Measurements included herbage accumulation (HA), root attributes, leaf chlorophyll content, and interception of photosynthetic radiation. The PR–WC compatibility was affected by soil environment. In both soil sites and growing seasons, the WC + PR herbage accumulations were similar but with different PR and WC partial accumulation. In DSS, the partial PR HA was 22% less than that observed in SSS; the partial WC HA was almost twice in DSS relative to SSS. In SSS, the WC stolon growing point numbers, stolon length, and stolon biomass increased 60, 88, and 94% relative to DSS, respectively. In the same way, the mixed sward increased root biomass and root length density, which was considered as a mechanism for improving plant resources capture from the soil. At cultivar level, the PR–WC compatibility was affected mainly by WC cultivar, and the effect of PR cultivar was fairly weak. The medium-leaved WC cultivar ‘Will’ showed the greatest compatibility with PR, particularly with cultivar ‘Bealey’. These results are valuable when designing new management strategies for mixed sward production in marginal environments. Modern cultivars of PR have capacity for adapting to marginal environments; however, it is necessary to improve the competitive ability of WC to capture soil resources under marginal soil conditions.

中文翻译：

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土壤环境引起的形态生理变化调节多年生黑麦草与白三叶草品种的相容性

在两个生长季节的扦插田间试验中评估了土壤环境对栽培品种相容性的影响。四种多年生黑麦草 ( Lolium perenne L.; PR) 和三种白三叶草 ( Trifolium repensL.; WC) 栽培品种在灌溉条件下在深 (DSS) 和浅 (SSS) 土壤上生长。测量包括牧草积累 (HA)、根属性、叶叶绿素含量和光合辐射的拦截。PR-WC 相容性受土壤环境的影响。在土壤位置和生长季节，WC + PR 牧草积累量相似，但 PR 和 WC 部分积累不同。在 DSS 中，部分 PR HA 比在 SSS 中观察到的少 22%；相对于 SSS，部分 WC HA 在 DSS 中几乎是两倍。在 SSS 中，WC 匍匐茎生长点数、匍匐茎长度和匍匐茎生物量相对于 DSS 分别增加了 60%、88% 和 94%。同样，混合草增加了根生物量和根长密度，这被认为是提高植物资源从土壤中捕获的机制。在品种水平上，PR-WC 相容性主要受 WC 品种的影响，PR 品种的影响较弱。中叶 WC 品种“Will”与 PR 表现出最大的相容性，特别是与品种“Bealey”。在为边缘环境中的混合草料生产设计新的管理策略时，这些结果很有价值。现代公关品种具有适应边缘环境的能力；然而，需要提高WC在边缘土壤条件下捕获土壤资源的竞争能力。在为边缘环境中的混合草料生产设计新的管理策略时，这些结果很有价值。现代公关品种具有适应边缘环境的能力；然而，需要提高WC在边缘土壤条件下捕获土壤资源的竞争能力。在为边缘环境中的混合草料生产设计新的管理策略时，这些结果很有价值。现代公关品种具有适应边缘环境的能力；然而，需要提高WC在边缘土壤条件下捕获土壤资源的竞争能力。