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Effects of cutting frequency of tall fescue on cadmium form in soil and cadmium enrichment in the plant
Author(s) -
Yang Zhehan,
Xue Bohan,
Li Na,
Song Guilong
Publication year - 2020
Publication title -
agronomy journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.752
H-Index - 131
eISSN - 1435-0645
pISSN - 0002-1962
DOI - 10.1002/agj2.20398
Subject(s) - cadmium , cutting , agronomy , festuca arundinacea , soil water , chemistry , festuca , horticulture , botany , biology , poaceae , organic chemistry , ecology
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.