10.26091/ESRNZ.9630638.v1
Shamim Al Mamun
Shamim Al
Mamun
Niklas J. Lehto
Niklas J.
Lehto
Jo Cavanagh
Jo
Cavanagh
Richard McDowell
Richard
McDowell
Munmun Aktar
Munmun
Aktar
Ebrahim Benyas
Ebrahim
Benyas
Brett H. Robinson
Brett H.
Robinson
Effects of lime and organic amendments derived from varied source materials on cadmium uptake by potato
Institute of Environmental Science and Research
2019
Cadmium
Cadmium Uptake
Potatoes
Lime
Organic Amendments
Compost Applications
Cadmium rich phosphate fertilizer
Solanum tuberosum L.
Cadmium contamination
New Zealand
Cadmium concentration in food
Agriculture, Land and Farm Management not elsewhere classified
Farming Systems Research
Fertilisers and Agrochemicals (Application etc.)
2019-08-19 04:29:43
Journal contribution
https://research.esr.cri.nz/articles/journal_contribution/Effects_of_lime_and_organic_amendments_derived_from_varied_source_materials_on_cadmium_uptake_by_potato/9630638
Repeated applications of Cd-rich phosphate fertilizers have resulted in elevated concentrations of this toxic element in some New Zealand soils. Exceedance of the food safety standard for Cd (0.1 mg kg fresh weight) has been reported for potato ( L.). Composts may efficiently sorb Cd in soil and therefore reduce its phytoavailability, leading to reduced uptake by plants. We aimed to determine the potential of various composts, shredded corn stover, and lime at two different rates to reduce the transfer of Cd from a soil (containing 1.45 mg kg Cd) to potato (var. 'Nadine'). In the control, the peeled tubers, skins, leaves, and stems had Cd concentrations of 0.04, 0.09, 0.26, and 0.53 mg kg dry weight, respectively. There was a 71% reduction in tuber Cd concentrations in potatoes grown in soil amended with 5% (w/w) shredded corn stover, although it significantly decreased potato biomass. Potatoes grown in soil amended with pig manure compost, mushroom compost, sawdust-animal waste compost, and municipal compost at rates of either 2.5 or 5% (w/w) reduced tuber Cd concentrations by 58 to 66%, 46 to 63%, 52 to 53%, and 29 to 49%, respectively. Lime (1.3%) application in soil reduced tuber Cd concentrations by 50%. Composts significantly increased tuber biomass. Further work is warranted to identify the key components of composts that result in reduced Cd uptake by plants.