Abstract
Using treated sludge to amend soil in agriculture presents opportunities and challenges, particularly concerning the augmentation of heavy metals in cultivated plants. This research looks into how applying treated sludge affects the buildup of heavy metals in African marigold (Tagetes erecta), a popular ornamental plant that could potentially help with phytoremediation. Several treatment combinations were imposed, out of which treated sludge at 2.5 t/ha showed promising results. The effect of incorporating treated sludge was found to be better in terms of using conventional manures like Farm Yard Manure and Vermicompost in quantitative terms. The sludge processed at the treatment plant underwent strict treatment procedures, resulting in odourless material that can be used as an organic amendment with nutrients. Heavy metal concentrations in plant tissues were analyzed using Inductively Coupled Plasma Mass Spectrometry (ICPMS) to assess the uptake and accumulation of heavy metals by African marigolds. Results indicated that treated sludge application did not significantly influence the accumulation and bioavailability of heavy metals in African marigolds. The treated sludge helped plants grow better and absorb nutrients; it did not cause higher levels of harmful heavy metals like cadmium and lead in the plants. The levels of heavy metals found were lower than what is considered unsafe for plants. In addition, treated sludge can serve as a soil conditioner to enhance the physicochemical properties of the soil.
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Claims 9
Claim · model-written summary
Treated sludge at 2.5 t/ha showed promising results.
- Taxon
- African marigold
Tagetes erectat0 - Treatment
- treated sludge at 2.5 t/hae0
- Outcome
- promising resultse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“treated sludge at 2.5 t/ha showed promising results”
t0“African marigold”
Claim · model-written summary
Treated sludge performed better than farmyard manure and vermicompost in quantitative terms.
- Taxon
- African marigoldTagetes erectat0
- Treatment
- treated sludgee0
- Outcome
- better in terms of using conventional manurese0
- Direction
- bettere0
- Comparator
- Farm Yard Manure and Vermicomposte0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“incorporating treated sludge was found to be better in terms of using conventional manures like Farm Yard Manure and Vermicompost in quantitative terms”
t0“African marigold”
Claim · model-written summary
Sludge application did not significantly affect heavy metal accumulation in African marigolds.
- Taxon
- African marigoldsTagetes erectae0
- Treatment
- treated sludge applicatione0
- Outcome
- accumulatione0
- Direction
- did not significantly influencee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“treated sludge application did not significantly influence the accumulation and bioavailability of heavy metals in African marigolds”
Claim · model-written summary
Sludge application did not significantly affect heavy metal bioavailability in African marigolds.
- Taxon
- African marigoldsTagetes erectae0
- Treatment
- treated sludge applicatione0
- Outcome
- bioavailability of heavy metalse0
- Direction
- did not significantly influencee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“treated sludge application did not significantly influence the accumulation and bioavailability of heavy metals in African marigolds”
Claim · model-written summary
Treated sludge improved marigold growth.
- Taxon
- African marigoldTagetes erectat0
- Treatment
- treated sludgee0
- Outcome
- plants growe0
- Direction
- bettere0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The treated sludge helped plants grow better and absorb nutrients”
t0“African marigold”
Claim · model-written summary
Treated sludge helped marigolds absorb nutrients.
- Taxon
- African marigoldTagetes erectat0
- Treatment
- treated sludgee0
- Outcome
- absorb nutrientse0
- Direction
- helpede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The treated sludge helped plants grow better and absorb nutrients”
t0“African marigold”
Claim · model-written summary
Sludge did not raise cadmium and lead levels in plants.
- Taxon
- African marigoldTagetes erectat0
- Treatment
- treated sludgee1
- Outcome
- levels of harmful heavy metals like cadmium and lead in the plantse0
- Direction
- did not cause highere0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“it did not cause higher levels of harmful heavy metals like cadmium and lead in the plants”
t0“African marigold”
e1“The treated sludge helped plants grow better”
Claim · model-written summary
Measured heavy metals were below levels considered unsafe for plants.
- Taxon
- African marigoldTagetes erectat0
- Outcome
- levels of heavy metalse0
- Direction
- lowere0
- Comparator
- what is considered unsafe for plantse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The levels of heavy metals found were lower than what is considered unsafe for plants”
t0“African marigold”
Claim · model-written summary
Authors propose treated sludge as a soil conditioner to improve soil physicochemical properties.
- Taxon
- African marigoldTagetes erectat0
- Outcome
- serve as a soil conditioner to enhance the physicochemical properties of the soile0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“treated sludge can serve as a soil conditioner to enhance the physicochemical properties of the soil”
t0“African marigold”
The same questions in other papers
organic · molecular: metabolites · Tagetes erecta (African marigold)Positive and negative results
1 in the opposite direction
- positive
organic · nutrient: content · Tagetes erecta (African marigold)Results agree
1 paper in the same direction as this paper
- positive
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.