Abstract
In this study, onsite field experiments were carried out to evaluate the effects of amending a crude oil polluted soil with oil palm fruit bunch ash (OPFBA), dried poultry litters (DPL), soil bacterial, physico-chemical properties, as well as the growth and tuber yield of cassava (Manihot esculenta CRANTZ) grown on the amended soils using standard techniques. Results of autotrophic bacteria counts revealed that nitrogen fixing bacteria (NFB) populations in soils treated with OPBA+DPL combined, OPBA and DPL singly, recorded high bioloads in the magnitude of 105 , 103 , 105 CFU/g of soil respectively, whereas the group mean population was lower in the control soil (103 CFU/g). Similar trends were observed for SRB, PSB, and THB. Results of aggregate growth showed that while the mean plant heights and number of nodes increased, stem girth and leaf area were observed to decrease in 2017 when compared with those of 2016. Apart from number of tubers and weights that showed increase under all amendment treatments, tuber girth and length decreased under DPL amendments in 2017. The average findings of several chemical and physical characteristics of crude oil polluted soil after amendments and subsequent cultivation demonstrated that the addition of DPL and OPBA fructifies the soil by increasing reduced or lost qualities. When the amendments were used, the concentrations of organic carbon, accessible phosphorus, Ca, Mg, Na, and K were greatly enhanced, while the Total Petroleum Hydrocarbon (TPH) content was significantly reduced. In this study, the application of combination DPL + OPBA yields the greatest results in terms of ameliorating the impacts of crude oil in cultivable soils, as it increases fertility parameters for better cassava production in Niger Delta soils. The technology has been shown to be cost effective, efficient, and environmentally friendly, as well as capable of resolving waste management issues.
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Claims 10
Claim · model-written summary
Combined ash and poultry litter yielded high nitrogen-fixing bacterial counts.
- Taxon
- cassava
Manihot esculentat0 - Treatment
- OPBA+DPL combinede0
- Outcome
- nitrogen fixing bacteria (NFB) populationse1
- Value
- 105e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“soils treated with OPBA+DPL combined, OPBA and DPL singly, recorded high bioloads in the magnitude of 105 , 103 , 105 CFU/g of soil respectively”
e1“nitrogen fixing bacteria (NFB) populations”
t0“Cassava Growth”
Claim · model-written summary
Mean plant height and node count increased in 2017 versus 2016.
- Taxon
- cassavaManihot esculentat0
- Outcome
- mean plant heights and number of nodese0
- Direction
- increasede0
- Comparator
- 2016e1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the mean plant heights and number of nodes increased”
e1“in 2017 when compared with those of 2016”
t0“Cassava Growth”
Claim · model-written summary
Stem girth and leaf area decreased in 2017 versus 2016.
- Taxon
- cassavaManihot esculentat0
- Outcome
- stem girth and leaf areae0
- Direction
- decreasee0
- Comparator
- 2016e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“stem girth and leaf area were observed to decrease in 2017 when compared with those of 2016.”
t0“Cassava Growth”
Claim · model-written summary
Tuber numbers and weights increased under all amendments.
- Taxon
- cassavaManihot esculentat0
- Treatment
- all amendment treatmentse0
- Outcome
- number of tubers and weightse0
- Direction
- increasee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“number of tubers and weights that showed increase under all amendment treatments”
t0“Cassava Growth”
Claim · model-written summary
Tuber girth and length decreased under dried poultry litter in 2017.
- Taxon
- cassavaManihot esculentat0
- Treatment
- DPL amendmentse0
- Outcome
- tuber girth and lengthe0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“tuber girth and length decreased under DPL amendments in 2017.”
t0“Cassava Growth”
Claim · model-written summary
Amendments enhanced organic carbon and accessible phosphorus.
- Taxon
- cassavaManihot esculentat0
- Treatment
- amendmentse1
- Outcome
- concentrations of organic carbon, accessible phosphoruse0
- Direction
- greatly enhancede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the concentrations of organic carbon, accessible phosphorus, Ca, Mg, Na, and K were greatly enhanced”
e1“When the amendments were used”
t0“Cassava Growth”
Claim · model-written summary
Amendments enhanced calcium, magnesium and sodium concentrations.
- Taxon
- cassavaManihot esculentat0
- Treatment
- amendmentse1
- Outcome
- Ca, Mg, Nae0
- Direction
- greatly enhancede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the concentrations of organic carbon, accessible phosphorus, Ca, Mg, Na, and K were greatly enhanced”
e1“When the amendments were used”
t0“Cassava Growth”
Claim · model-written summary
Amendments enhanced potassium concentration.
- Taxon
- cassavaManihot esculentat0
- Treatment
- amendmentse1
- Outcome
- Ke0
- Direction
- greatly enhancede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the concentrations of organic carbon, accessible phosphorus, Ca, Mg, Na, and K were greatly enhanced”
e1“When the amendments were used”
t0“Cassava Growth”
Claim · model-written summary
Amendments significantly reduced total petroleum hydrocarbon content.
- Taxon
- cassavaManihot esculentat0
- Treatment
- amendmentse1
- Outcome
- Total Petroleum Hydrocarbon (TPH) contente0
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the Total Petroleum Hydrocarbon (TPH) content was significantly reduced.”
e1“When the amendments were used”
t0“Cassava Growth”
Claim · model-written summary
Combined DPL and OPBA gave the greatest soil amelioration and fertility for cassava production.
- Taxon
- cassavaManihot esculentae0
- Treatment
- combination DPL + OPBAe0
- Outcome
- greatest results in terms of ameliorating the impacts of crude oile0
- Direction
- greateste0
- Setting
- Niger Delta soilse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the application of combination DPL + OPBA yields the greatest results in terms of ameliorating the impacts of crude oil in cultivable soils, as it increases fertility parameters for better cassava production in Niger Delta soils.”
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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.