Abstract
Dried digested sewage sludge from the Manukau Purification Plant, Auckland, was mixed at 5 different rates with 4 local soils and used to grow tomatoes in a glasshouse pot trial. Analysis of the sludge showed that it had less heavy metals than most sludges from industrial towns overseas. Addition of sludge to soil increased the concentration in the plant of Mo, P, Zn, S, Ni, Cu, Na, Ca, B, Mn, and Cd but decreased Al, V, Ti, Ba, Si, Sr, Fe, Cl, and Cr. Analyses of root, leaf, and fruit showed that the fruit had the lowest concentration of most elements. Application of sludge to soils slightly increased concentrations of Ni, Cu, Mo, Mn, and Zn in the fruit but gave no change in Cr, Pb, and Cd. Relationships of plant yield and plant composition to soil material were lost by applying sludge to the 4 soils.
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Claims 6
Claim · model-written summary
Sewage sludge increased eleven element concentrations in tomato plants.
- Taxon
- tomatoes
Solanum lycopersicumt0 - Treatment
- Addition of sludge to soile0
- Outcome
- concentration in the plant of Mo, P, Zn, S, Ni, Cu, Na, Ca, B, Mn, and Cde0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“tomatoes”
e0“Addition of sludge to soil increased the concentration in the plant of Mo, P, Zn, S, Ni, Cu, Na, Ca, B, Mn, and Cd”
Claim · model-written summary
Sewage sludge decreased nine element concentrations in tomato plants.
- Taxon
- tomatoesSolanum lycopersicumt0
- Treatment
- sludgee1
- Outcome
- Al, V, Ti, Ba, Si, Sr, Fe, Cl, and Cre0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“tomatoes”
e0“decreased Al, V, Ti, Ba, Si, Sr, Fe, Cl, and Cr”
e1“Addition of sludge to soil increased the concentration in the plant of Mo, P, Zn, S, Ni, Cu, Na, Ca, B, Mn, and Cd”
Claim · model-written summary
Tomato fruit contained the lowest concentrations of most elements among root, leaf and fruit.
- Taxon
- tomatoesSolanum lycopersicumt0
- Organ / stage
- fruite0
- Outcome
- concentration of most elementse0
- Direction
- loweste0
- Comparator
- root, leaf, and fruite0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“tomatoes”
e0“Analyses of root, leaf, and fruit showed that the fruit had the lowest concentration of most elements”
Claim · model-written summary
Sewage sludge slightly increased nickel, copper, molybdenum, manganese and zinc concentrations in tomato fruit.
- Taxon
- tomatoesSolanum lycopersicumt0
- Organ / stage
- fruite0
- Treatment
- Application of sludge to soilse0
- Outcome
- concentrations of Ni, Cu, Mo, Mn, and Zn in the fruite0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“tomatoes”
e0“Application of sludge to soils slightly increased concentrations of Ni, Cu, Mo, Mn, and Zn in the fruit”
Claim · model-written summary
Sewage sludge did not change chromium, lead and cadmium concentrations in tomato fruit.
- Taxon
- tomatoesSolanum lycopersicumt0
- Organ / stage
- fruite0
- Treatment
- Application of sludge to soilse0
- Outcome
- Cr, Pb, and Cde0
- Direction
- no changee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“tomatoes”
e0“Application of sludge to soils slightly increased concentrations of Ni, Cu, Mo, Mn, and Zn in the fruit but gave no change in Cr, Pb, and Cd”
Claim · model-written summary
Sludge application removed relationships of tomato yield and composition with soil material.
- Taxon
- tomatoesSolanum lycopersicumt0
- Treatment
- applying sludgee0
- Outcome
- plant yield and plant compositione0
- Direction
- loste0
- Setting
- 4 soilse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“tomatoes”
e0“Relationships of plant yield and plant composition to soil material were lost by applying sludge to the 4 soils”
The same questions in other papers
organic · nutrient: content · Solanum lycopersicum (tomato)Positive and negative results
3 papers in the same direction as this paper · 19 in the opposite direction
- positive
- positive
- positive
19 papers more in this group
See all 23 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.