Effects of full inversion tillage during pasture renewal on soil and plant cadmium concentrations: a case study in New Zealand

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dc.contributor.authorPeng Y
dc.contributor.authorHanly JA
dc.contributor.authorJeyakumar P
dc.contributor.authorCalvelo-Pereira R
dc.date.available5/12/2022
dc.date.issued5/12/2022
dc.descriptionCAUL read and publish agreement 2023
dc.description.abstractContext: Cadmium (Cd) accumulation is a concern in permanent pasture soils, as it can lead to increased Cd uptake by plants. Aims: This study aimed to quantify the effect of full inversion tillage (FIT or ploughing deeper than 30 cm), used during pasture renewal, on the redistribution of Cd within the soil profile and on plant Cd concentration. Methods: Two field trials (Trial 1, Alfisol; Trial 2, Andisol) were established in New Zealand using contrasting tillage practices (FIT; SIT, shallow tillage; and NT, no tillage) to sow turnips as summer forage crops, followed by autumn re-sowing of perennial ryegrass/white clover pasture. Key results: In the Alfisol, no measurable differences (P > 0.05) in soil and plant Cd were detected among the tillage treatments. In the Andisol, FIT decreased (P < 0.05) total (0.25 mg/kg) and extractable soil Cd (0.013 mg/kg) in the 0–5 cm depth, compared to pre-tillage (0.42 and 0.031 mg/kg, respectively). Moreover, at this soil depth, FIT achieved a 52% lower (P = 0.034) extractable soil Cd concentration than the ST treatment. In addition, the subsequent new pasture had lower (P = 0.007) average Cd concentration following FIT compared to ST (0.03 vs 0.05 mg/kg). Conclusions: We demonstrated that the use of FIT during pasture renewal is a potential solution to reduce topsoil Cd concentration. Implications: The FIT is more effective in soil where total soil Cd concentration or its degree of vertical stratification with depth is relatively high.
dc.description.confidentialFALSE
dc.identifier.citationSoil Research, 2022
dc.identifier.doi10.1071/SR22193
dc.identifier.elements-id458964
dc.identifier.harvestedMassey_Dark
dc.identifier.issn0004-9573
dc.identifier.urihttps://hdl.handle.net/10179/17947
dc.publisherCSIRO Publishing
dc.relation.isPartOfSoil Research
dc.relation.urihttps://www.publish.csiro.au/sr/SR22193
dc.titleEffects of full inversion tillage during pasture renewal on soil and plant cadmium concentrations: a case study in New Zealand
dc.typeJournal article
pubs.notesNot known
pubs.organisational-group/Massey University
pubs.organisational-group/Massey University/College of Sciences
pubs.organisational-group/Massey University/College of Sciences/School of Agriculture & Environment
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