Abstract
ABSTRACT The application of zinc (Zn) fertiliser to soil has been proposed as a mitigation strategy to decrease plant cadmium (Cd) concentrations. The strategy is untested in New Zealand and it is unclear whether it is effective in soils that are not Zn deficient. We undertook a glasshouse experiment and measured what effect applying Zn had on Cd concentrations in spinach ( Spinacia olearacea L.) cultivated in a soil with a high extractable Zn concentration (7.3 mg kg −1 ) and total Cd concentration of 0.48 mg kg −1 . The addition of 5–20 kg Zn ha −1 as zinc sulphate decreased Cd concentrations in spinach leaves after 64 days growth by 19–28% and in roots by up to 42%. In contrast, the addition of Zn increased Zn concentrations in spinach roots and leaves by 55% and 112% respectively. The decrease in Cd concentrations in spinach was likely a result of competition with Zn that restricted Cd uptake into the root. The results indicate there may be potential in using Zn fertiliser to decrease plant Cd concentrations. However, investigation needs to be undertaken to evaluate its effectiveness for soil types with different properties and Zn status, other food crops which may respond differently to spinach and the results confirmed in a field experiment.
Abstract from the paper’s OpenAlex record; open copy licensed cc-by. Read at the source ↗
The text the model read, with the source record’s inline markup (italics, sub- and superscripts) rendered and its character entities decoded; quote offsets refer to the raw text.
Claims 6
Claim · model-written summary
Adding 5–20 kg Zn ha −1 as zinc sulphate decreased Cd concentrations in spinach leaves by 19–28% after 64 days.
- Taxon
- spinach
Spinacia oleraceat0 - Organ / stage
- leavese1
- Treatment
- The addition of 5–20 kg Zn ha −1 as zinc sulphatee1
- Outcome
- Cd concentrationse1
- Direction
- decreasede1
- Value
- 19–28%e1
- Qualifier
- after 64 days growthe1
- Setting
- glasshouse experimente7
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“The addition of 5–20 kg Zn ha −1 as zinc sulphate decreased Cd concentrations in spinach leaves after 64 days growth by 19–28%”
e7“We undertook a glasshouse experiment”
t0“spinach in a zinc sufficient soil”
Claim · model-written summary
Adding 5–20 kg Zn ha −1 as zinc sulphate decreased Cd concentrations in spinach roots by up to 42%.
- Taxon
- spinachSpinacia oleraceat0
- Organ / stage
- rootse2
- Treatment
- The addition of 5–20 kg Zn ha −1 as zinc sulphatee1
- Outcome
- Cd concentrationse1
- Direction
- decreasede1
- Value
- up to 42%e2
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“The addition of 5–20 kg Zn ha −1 as zinc sulphate decreased Cd concentrations in spinach leaves after 64 days growth by 19–28%”
e2“and in roots by up to 42%”
t0“spinach in a zinc sufficient soil”
Claim · model-written summary
Adding Zn increased Zn concentrations in spinach roots by 55%.
- Taxon
- spinachSpinacia oleraceat0
- Organ / stage
- rootse3
- Treatment
- the addition of Zne3
- Outcome
- Zn concentrationse3
- Direction
- increasede3
- Value
- 55%e3
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e3“the addition of Zn increased Zn concentrations in spinach roots and leaves by 55% and 112% respectively”
t0“spinach in a zinc sufficient soil”
Claim · model-written summary
Adding Zn increased Zn concentrations in spinach leaves by 112%.
- Taxon
- spinachSpinacia oleraceat0
- Organ / stage
- leavese3
- Treatment
- the addition of Zne3
- Outcome
- Zn concentrationse3
- Direction
- increasede3
- Value
- 112%e3
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e3“the addition of Zn increased Zn concentrations in spinach roots and leaves by 55% and 112% respectively”
t0“spinach in a zinc sufficient soil”
Claim · model-written summary
The decrease in spinach Cd concentrations was likely caused by competition with Zn that restricted Cd uptake into the root.
- Taxon
- spinachSpinacia oleraceat0
- Compound
- Zne4
- Outcome
- decrease in Cd concentrationse4
- Qualifier
- likelye4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e4“The decrease in Cd concentrations in spinach was likely a result of competition with Zn that restricted Cd uptake into the root”
t0“spinach in a zinc sufficient soil”
Claim · model-written summary
The results indicate potential for using Zn fertiliser to decrease plant Cd concentrations.
- Taxon
- spinachSpinacia oleraceat0
- Outcome
- using Zn fertiliser to decrease plant Cd concentrationse5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e5“there may be potential in using Zn fertiliser to decrease plant Cd concentrations”
t0“spinach in a zinc sufficient soil”
The same questions in other papers
zinc atom · nutrient: content · Spinacia oleracea (spinach)Positive and negative results
8 papers in the same direction as this paper · 2 in the opposite direction
- negative
- negative
- positive
7 papers more in this group
See all 11 papers →Claims are grouped by organism, treatment and what was measured or targeted. A paper counts as positive when any of its claims in the group is positive.