Abstract
ABSTRACT Phosphorus (P) is a limiting nutrient for coffee seedlings. To meet this requirement, coffee growers usually apply di-ammonium phosphate (DAP), which is highly sensitive to local price fluctuations. The use of arbuscular mycorrhizal fungi (AMF) and phosphate-solubilizing fungi (PSF) has been recommended, but the results derived from their application are inconsistent and uncertain, depending on soil fertility status. The response of AMF and PSF application in the plant growth of coffee seedlings during the nursery stage was evaluated in four non-sterile soils, which represent the most abundant type of soils in the coffee regions of Colombia: Eutropept, Dystropept, Fulvudand, and Ultisol. The treatments included a commercial AMF inoculum, PSF-Phlebia subserialis-CH4, and a consortium of AMF+PSF, at four P levels (0, 0.5, 1, and 2 g.plant-1 P2O5) using DAP fertilizer. Shoot dry weight (SDW) was affected by P applications in Fulvudand. In the other soils, a P-response occurred with 0.5 g.plant-1 , whereas 1 and 2 g.plant-1 of P2O5 caused a significant reduction in SDW. AMF increased SDW by 40% in Eutropept. The negative effect of higher P amounts was mitigated (> 70%) through PSF and AMF+PSF in Ultisol and Eutropept, respectively. In plants in which microorganisms increased SDW, the P concentration was 0.17 to 0.22%. The plant growth promotion of coffee seedlings during the nursery stage with AMF and/or PSF applications varied according to soil type and P amounts applied.
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Claims 7
Claim · model-written summary
AMF increased coffee shoot dry weight by 40% in Eutropept
CoffeaNot reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Phosphorus (P) is a limiting nutrient for coffee seedlings”
e1“AMF increased SDW by 40% in Eutropept”
Claim · model-written summary
Doses of 1 and 2 g.plant-1 P2O5 significantly reduced coffee shoot dry weight in the other soils
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Phosphorus (P) is a limiting nutrient for coffee seedlings”
e1“In the other soils, a P-response occurred with 0.5 g.plant-1 , whereas 1 and 2 g.plant-1 of P2O5 caused a significant reduction in SDW”
Claim · model-written summary
P applications affected coffee shoot dry weight in Fulvudand
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Phosphorus (P) is a limiting nutrient for coffee seedlings”
e1“Shoot dry weight (SDW) was affected by P applications in Fulvudand”
Claim · model-written summary
PSF mitigated the negative effect of higher P amounts by more than 70% in Ultisol
- Treatment
- PSFe1
- Interactor
- PSFe1symbiont
- Outcome
- negative effect of higher P amountse1
- Direction
- mitigatede1
- Value
- > 70%e1
- Setting
- Ultisole1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Phosphorus (P) is a limiting nutrient for coffee seedlings”
e1“The negative effect of higher P amounts was mitigated (> 70%) through PSF and AMF+PSF in Ultisol and Eutropept, respectively”
Claim · model-written summary
AMF+PSF mitigated the negative effect of higher P amounts by more than 70% in Eutropept
- Treatment
- AMF+PSFe1
- Interactor
- AMFe1symbiont
- Second interactor
- PSFe1symbiont
- Outcome
- negative effect of higher P amountse1
- Direction
- mitigatede1
- Value
- > 70%e1
- Setting
- Eutropepte1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Phosphorus (P) is a limiting nutrient for coffee seedlings”
e1“The negative effect of higher P amounts was mitigated (> 70%) through PSF and AMF+PSF in Ultisol and Eutropept, respectively”
Claim · model-written summary
Coffee shoot P concentration was 0.17 to 0.22% in plants whose shoot dry weight microorganisms increased
- Outcome
- P concentratione1
- Value
- 0.17 to 0.22%e1
- Qualifier
- In plants in which microorganisms increased SDWe1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Phosphorus (P) is a limiting nutrient for coffee seedlings”
e1“In plants in which microorganisms increased SDW, the P concentration was 0.17 to 0.22%”
Claim · model-written summary
Coffee seedling growth promotion by AMF and/or PSF varied with soil type and P amount during the nursery stage
- Treatment
- AMF and/or PSF applicationse1
- Interactor
- AMFe1symbiont
- Second interactor
- PSFe1symbiont
- Outcome
- plant growth promotione1
- Qualifier
- varied according to soil type and P amounts appliede1
- Setting
- nursery stagee1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“The plant growth promotion of coffee seedlings during the nursery stage with AMF and/or PSF applications varied according to soil type and P amounts applied”
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See all 8 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.