Abstract
We assessed the response of the tomato variety “Tiny Tom” to the application of copper (Cu) and zinc (Zn) fertilizers in three tropical peat soils of Sarawak: mixed swamp forest, Alan forest and Padang Alan forest. Limed soils were used because peat soils in their natural condition are unsuitable to sustain healthy growth of most crops. Yield responses were correlated with added Cu and Zn using Mitscherlich model. Adequate levels of applied Cu and Zn were calculated as those which resulted in 90% of the maximum obtainable shoot dry weight. Application of Cu and Zn significantly (P ≤ 0.05) increased the shoot dry weight and the shoot Cu and Zn concentrations of tomato. Application of the equivalent of 8.3 kg Cu and 5.2 kg Zn per ha was required to achieve 90% of the maximum shoot dry weight. In tomato shoots, the critical concentration for Cu was 18 mg/kg and for Zn, 92 mg/kg. The corresponding concentrations for diethylenetriaminepentaaceticacid (DTPA) extractable Cu and Zn in the soils were 2.3 mg Cu kg −1 and 3.6 mg Zn kg −1 . However, the addition of Cu fertilizer also increased Zn uptake by tomato plant, probably by displacing native Zn that was weakly sorbed to the soil solid phase.
Abstract from the paper’s OpenAlex record, shown for indexing and research. Copyright remains with the authors or the publisher. 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 10
Claim · model-written summary
Copper and zinc application significantly increased tomato shoot dry weight.
- Taxon
- tomato
Solanum lycopersicume0 - Treatment
- Cu and Zne0
- Outcome
- shoot dry weighte0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Application of Cu and Zn significantly (P ≤ 0.05) increased the shoot dry weight and the shoot Cu and Zn concentrations of tomato.”
Claim · model-written summary
Copper and zinc application significantly increased shoot Cu concentration.
- Taxon
- tomatoSolanum lycopersicume0
- Treatment
- Cu and Zne0
- Outcome
- shoot Cue0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Application of Cu and Zn significantly (P ≤ 0.05) increased the shoot dry weight and the shoot Cu and Zn concentrations of tomato.”
Claim · model-written summary
Copper and zinc application significantly increased shoot Zn concentration.
- Taxon
- tomatoSolanum lycopersicume0
- Treatment
- Cu and Zne0
- Outcome
- Cu and Zn concentrationse0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Application of Cu and Zn significantly (P ≤ 0.05) increased the shoot dry weight and the shoot Cu and Zn concentrations of tomato.”
Claim · model-written summary
The calculated Cu application required for 90% maximum shoot dry weight was 8.3 kg Cu per ha.
Not reportedTaxon
Verbatim
e0“Application of the equivalent of 8.3 kg Cu and 5.2 kg Zn per ha was required to achieve 90% of the maximum shoot dry weight.”
Claim · model-written summary
The calculated Zn application required for 90% maximum shoot dry weight was 5.2 kg Zn per ha.
Not reportedTaxon
Verbatim
e0“Application of the equivalent of 8.3 kg Cu and 5.2 kg Zn per ha was required to achieve 90% of the maximum shoot dry weight.”
Claim · model-written summary
The critical Cu concentration in tomato shoots was 18 mg/kg.
- Taxon
- tomatoSolanum lycopersicume0
- Organ / stage
- shootse0
- Outcome
- critical concentration for Cue0
- Value
- 18 mg/kge0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In tomato shoots, the critical concentration for Cu was 18 mg/kg”
Claim · model-written summary
The critical Zn concentration in tomato shoots was 92 mg/kg.
Not reportedTaxon
Verbatim
e0“for Zn, 92 mg/kg.”
Claim · model-written summary
The corresponding DTPA extractable soil Cu concentration was 2.3 mg Cu kg −1.
Not reportedTaxon
Verbatim
e0“diethylenetriaminepentaaceticacid (DTPA) extractable Cu and Zn in the soils were 2.3 mg Cu kg −1 and 3.6 mg Zn kg −1”
Claim · model-written summary
The corresponding DTPA extractable soil Zn concentration was 3.6 mg Zn kg −1.
Not reportedTaxon
Verbatim
e0“extractable Cu and Zn in the soils were 2.3 mg Cu kg −1 and 3.6 mg Zn kg −1”
Claim · model-written summary
Cu fertilizer also increased tomato Zn uptake.
- Taxon
- tomatoSolanum lycopersicume0
- Treatment
- Cu fertilizere0
- Outcome
- Zn uptakee0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the addition of Cu fertilizer also increased Zn uptake by tomato plant”
The same questions in other papers
copper atom · growth · Solanum lycopersicum (tomato)Results differ
11 papers in the same direction as this paper · 20 in the opposite direction
- negative
- negative
- negative
28 papers more in this group
See all 32 papers →zinc atom · growth · Solanum lycopersicum (tomato)Results differ
35 papers in the same direction as this paper · 21 in the opposite direction
- negative
- negative
- negative
53 papers more in this group
See all 57 papers →copper atom · nutrient: content · Solanum lycopersicum (tomato)Positive and negative results
1 paper in the same direction as this paper · 8 in the opposite direction
- no effect
- negative
- negative
6 papers more in this group
See all 10 papers →zinc atom · nutrient: content · Solanum lycopersicum (tomato)Positive and negative results
14 papers in the same direction as this paper · 7 in the opposite direction
- negative
- no effect
- negative
18 papers more in this group
See all 22 papers →fertilization · nutrient: content · Solanum lycopersicum (tomato)Positive and negative results
225 papers in the same direction as this paper · 38 in the opposite direction · 7 reporting no difference from an alternative
- no effect
- negative
- no effect
267 papers more in this group
See all 271 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.