Cutting is a common practice for turfgrass culture and maintenance, and it may affect cadmium (Cd) uptake and enrichment due to the removal and regrowth of aboveground parts. The objective of this study was to determine how cutting frequency affects Cd form in the soil and its enrichment and distribution in clippings, stubble and roots. In this study, ‘K‐31’ tall fescue (Festuca elata L.) plants were grown in soils containing different amounts of Cd (0, 5, 25 and 50 mg kg⁻¹) and cut at three different frequencies (no cutting, one cutting, two cuttings and five cuttings in two weeks). The cutting treatment caused a significant decrease in the soil pH, and it promoted Cd absorption by roots and Cd transfer to stubble. Increasing the cutting frequency increased acid‐soluble and reducible Cd content in soil, and the Cd content in the stubble and roots increased significantly and peaked at five cuttings. Cutting treatment exacerbated changes in plant ultrastructure under Cd stress as the chloroplasts of clippings swelled and the number of plastoglobuli in chloroplasts increased. Our study demonstrated that cutting frequency affects the conversion of Cd forms in the soil, promotes Cd absorption in roots, promotes Cd transport to stubble and exacerbates Cd stress on plants.

中文翻译：

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高羊茅cutting割频率对土壤镉形态和植物镉富集的影响。

切割是草坪草的培养和维护的常用方法，由于地上部分的去除和再生，它可能会影响镉（Cd）的吸收和富集。这项研究的目的是确定切割频率如何影响土壤中Cd的形态及其在clipping插，残茬和根中的富集和分布。在这项研究中，“ K‐31”高羊茅（Festuca elata L.）植物生长在含有不同量Cd（0、5、25和50 mg kg ^-1的土壤）中）并以三种不同的频率进行切割（两周内不切割，一次切割，两次切割和五次切割）。cutting插处理导致土壤pH值显着降低，并促进了根部吸收Cd和将Cd转移至残茬。增加cutting插频率会增加土壤中酸溶性和可还原的Cd含量，并且发茬和根部中的Cd含量显着增加，并在五个cutting插处达到峰值。clipping插处理增加了Cd胁迫下植物超微结构的变化，因为剪枝的叶绿体膨胀，叶绿体中的原生质球数量增加。我们的研究表明，cutting割频率会影响土壤中Cd形态的转化，促进Cd在根部的吸收，促进Cd转运至残茬并加剧植物对Cd的胁迫。