Abstract
Zinc (Zn) and iron (Fe) are among the micronutrients humans need. However, the main food sources in developing countries such as Malaysia have low micronutrients, making it insufficient to supply the minimum daily requirement. Foliar fertilization is one of the most effective and safe ways to enrich important micronutrients in plants. This study investigated variations in Zn and Fe sources to evaluate the effects of individual Zn and Fe foliar applications on growth, dry matter, and nutrient uptake by lettuce (Lactuca sativa). Based on the result, the application of Zn and Fe in the form of sulfate salt showed a lower toxicity effect in terms of growth and dry matter of plants than Fe and Zn in the form of ethylenediaminetetraacetic acid (EDTA). In terms of Zn uptake, it was found that there was a significant difference observed compared to the control, especially when 3 kg/ha Zn was applied, regardless of whether it was in the form of sulfate or EDTA. Furthermore, there was an increase in Fe uptake observed with increased Zn application. In contrast, the Fe application showed no difference in Fe intake compared to the control. It was found that there is a decrease in Zn uptake observed with increasing application of Fe rate. Sufficient Fe content is already available in the soil, and plants only take up what is needed for growth.
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Claims 6
Claim · model-written summary
Sulfate forms of Zn and Fe caused less growth and dry matter toxicity than EDTA forms.
- Taxon
- lettuce
Lactuca sativae1 - Treatment
- Zn and Fe in the form of sulfate salte0
- Outcome
- growth and dry mattere0
- Direction
- lower toxicitye0
- Comparator
- Fe and Zn in the form of ethylenediaminetetraacetic acid (EDTA)e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“application of Zn and Fe in the form of sulfate salt showed a lower toxicity effect in terms of growth and dry matter of plants than Fe and Zn in the form of ethylenediaminetetraacetic acid (EDTA)”
e1“lettuce (Lactuca sativa)”
Claim · model-written summary
Applying Zn, particularly at 3 kg/ha, significantly changed lettuce Zn uptake compared with control regardless of source.
- Taxon
- lettuceLactuca sativae1
- Treatment
- 3 kg/ha Zne0
- Outcome
- Zn uptakee0
- Qualifier
- regardless of whether it was in the form of sulfate or EDTAe0
- Comparator
- controle0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Zn uptake, it was found that there was a significant difference observed compared to the control, especially when 3 kg/ha Zn was applied, regardless of whether it was in the form of sulfate or EDTA”
e1“lettuce (Lactuca sativa)”
Claim · model-written summary
Greater Zn application increased Fe uptake.
- Taxon
- lettuceLactuca sativae1
- Treatment
- Zn applicatione0
- Outcome
- Fe uptakee0
- Direction
- increasee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“there was an increase in Fe uptake observed with increased Zn application”
e1“lettuce (Lactuca sativa)”
Claim · model-written summary
Fe application did not change Fe intake relative to control.
- Taxon
- lettuceLactuca sativae1
- Treatment
- Fe applicatione0
- Outcome
- Fe intakee0
- Direction
- no differencee0
- Comparator
- controle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the Fe application showed no difference in Fe intake compared to the control”
e1“lettuce (Lactuca sativa)”
Claim · model-written summary
Increasing Fe application decreased Zn uptake.
- Taxon
- lettuceLactuca sativae1
- Treatment
- application of Fee0
- Outcome
- Zn uptakee0
- Direction
- decreasee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“there is a decrease in Zn uptake observed with increasing application of Fe rate”
e1“lettuce (Lactuca sativa)”
Claim · model-written summary
The authors conclude that soil Fe is sufficient and lettuce takes up only the Fe needed for growth.
- Taxon
- lettuceLactuca sativae1
- Compound
- Fee0
- Outcome
- plants only take up what is needed for growthe0
- Qualifier
- Sufficient Fe content is already available in the soile0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Sufficient Fe content is already available in the soil, and plants only take up what is needed for growth.”
e1“lettuce (Lactuca sativa)”
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