Cadmium is a common heavy metal pollutant. In some plants, its absorption is inhibited by exogenous phosphorus. Here, the effect of P supplementation on the growth of tall fescue exposed to Cd was evaluated in a hydroponic culture experiment. Plants were exposed to five concentrations of P (0, 0.25, 0.5, 0.75, and 1.0 mmol L^-1) and three concentrations of Cd (50, 100, and 150 mg L^-1), and plant growth, Cd content, absorption, physiological characteristics, and nutrient accumulation were investigated. P supplementation significantly reduced the Cd content, Cd translocation factor

(TF), Cd removal efficiency, plant P absorption, chlorophyll content, glutathione levels, glutathione reductase levels, and superoxide dismutase (SOD) activity in tall fescue under Cd stress (P < 0.05). Moreover, it increased the vertical growth rate and biomass of tall fescue. At a constant P concentration, the biomass and vertical growth rate significantly decreased with an increasing Cd concentration, and the shoot Cd content, SOD activity, and TF significantly increased (P < 0.05). High P supplementation (0.75 and 1.0 mmol L^-1) ameliorated the damage caused by 150 mg L^–1 Cd stress, and the biomass, vertical shoot and vertical root growth rates were increased by 72.06–82.06%, 250.00–316.67%, 300.00–312.00%, respectively. In the plants subjected to 50 mg L^–1 Cd stress, 0.5 mmol L^-1 P supplementation enhanced biomass, vertical shoot and vertical root growth rates by 29.99%, 20.41%, and 21.43%, respectively, and reduced the Cd content in shoots (45.85%) and roots (9.71%). Except for the total potassium content and catalase activity, different concentrations of Cd negatively affected all parameters tested. Such negative effects were limited by P supplementation. Optimizing the nutrient composition and concentrations could minimize the potential negative impacts of Cd on plant growth.

镉是一种常见的重金属污染物。在一些植物中，其吸收被外源磷抑制。在这里，在水培培养实验中评估了补充磷对暴露于镉的高羊茅生长的影响。使植物暴露于五种浓度的P（0、0.25、0.5、0.75和1.0 mmol L ^-1）和三种浓度的Cd（50、100和150 mg L ^-1），以及植物的生长，Cd含量，吸收的生理特性和养分积累情况。补磷显着降低了镉含量，镉易位因子

（TF），Cd去除效率，植物P吸收，叶绿素含量，谷胱甘肽水平，谷胱甘肽还原酶水平和Cd胁迫下高羊茅粪中超氧化物歧化酶（SOD）活性（P <0.05）。而且，它增加了高羊茅的垂直生长速率和生物量。在恒定的P浓度下，随着Cd浓度的增加，生物量和垂直生长速率显着下降，而芽Cd含量，SOD活性和TF显着增加（P <0.05）。高P补充（0.75和1.0 mmol L ^-1）减轻了150 mg L ^–1 Cd胁迫所造成的损害，生物量，垂直枝和垂直根生长速率分别提高了72.06–82.06％，250.00–316.67％，300.00分别为–312.00％。在承受50 mg L ^–1的植物中镉胁迫，0.5 mmol L ^-1 P的添加分别使生物量，垂直芽和垂直根生长速率分别提高了29.99％，20.41％和21.43％，并降低了芽（45.85％）和根（9.71％）中的Cd含量。 。除了总钾含量和过氧化氢酶活性，不同浓度的Cd会对所有测试参数产生负面影响。这种负面影响受到补磷的限制。优化营养成分和浓度可以最大程度地降低镉对植物生长的潜在负面影响。