Abstract
Soil phosphorus (P) availability is a limiting factor for coffee seedling growth. Usually, large amounts of P fertilizers are required, generating nutritional imbalance, increasing production costs, and raising environmental concerns in water pollution. The use of arbuscular mycorrhizal fungi (AMF) can enhance plant P uptake and growth and reduce the dose of P fertilizers. A greenhouse experiment was conducted in a substrate containing Paleudult soil and quartz sand, with low level of soluble P (1 mg kg-1), to establish the effect of AMF inoculation with Rhizoglomus fasciculatum on coffee (Coffea arabica L. cv. Colombia) seedlings growth and P uptake under three levels of P in soil solution (0.002, 0.02, and 0.2 mg L-1). AMF colonization was significantly reduced when contents of P in solution increased. Shoot dry weight and P foliar concentration were increased by the AMF inoculation when soil P in solution was 0.02 mg L-1; these effects were lower at 0.2 mg L-1 and null at 0.002 mg L-1 P. Results showed that AMF inoculation can play an important role in the growth of coffee seedlings as long as the content P in soil solution maintains intermediate level. At the lowest P level, the response of coffee seedlings to AMF inoculation was ineffective, while at the highest level, AMF application was unnecessary for coffee growth.
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Claims 6
Claim · model-written summary
Mycorrhizal colonization decreased significantly as phosphorus in solution increased.
CoffeaOrganisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“AMF colonization was significantly reduced when contents of P in solution increased.”
t0“coffee seedlings through mycorrhizal inoculation”
t1“Rhizoglomus fasciculatum”
Claim · model-written summary
AMF inoculation increased coffee shoot dry weight at 0.02 mg L-1 soil-solution phosphorus.
- Treatment
- AMF inoculatione0
- Interactor
- Rhizoglomus fasciculatumt1symbiont
- Outcome
- Shoot dry weighte0
- Direction
- increasede0
- Qualifier
- soil P in solution was 0.02 mg L-1e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Shoot dry weight and P foliar concentration were increased by the AMF inoculation when soil P in solution was 0.02 mg L-1”
t0“coffee seedlings”
t1“Rhizoglomus fasciculatum”
Claim · model-written summary
AMF inoculation increased coffee foliar phosphorus concentration at 0.02 mg L-1 soil-solution phosphorus.
- Treatment
- AMF inoculatione0
- Interactor
- Rhizoglomus fasciculatumt1symbiont
- Outcome
- P foliar concentratione0
- Direction
- increasede0
- Qualifier
- soil P in solution was 0.02 mg L-1e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Shoot dry weight and P foliar concentration were increased by the AMF inoculation when soil P in solution was 0.02 mg L-1”
t0“coffee seedlings”
t1“Rhizoglomus fasciculatum”
Claim · model-written summary
AMF effects on coffee growth and foliar phosphorus were lower at 0.2 mg L-1 phosphorus.
- Treatment
- AMF inoculatione1
- Interactor
- Rhizoglomus fasciculatume2symbiont
- Outcome
- these effectse0
- Direction
- lowere0
- Qualifier
- 0.2 mg L-1e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“these effects were lower at 0.2 mg L-1”
t0“coffee seedlings”
e1“AMF inoculation when soil P in solution”
e2“Rhizoglomus fasciculatum”
Claim · model-written summary
AMF effects on coffee growth and foliar phosphorus were absent at 0.002 mg L-1 phosphorus.
- Treatment
- AMF inoculatione1
- Interactor
- Rhizoglomus fasciculatume2symbiont
- Outcome
- these effectse0
- Direction
- nulle0
- Qualifier
- 0.002 mg L-1 Pe0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“these effects were lower at 0.2 mg L-1 and null at 0.002 mg L-1 P.”
t0“coffee seedlings”
e1“AMF inoculation when soil P in solution”
e2“Rhizoglomus fasciculatum”
Claim · model-written summary
The authors conclude that AMF inoculation supports coffee seedling growth when phosphorus in solution is intermediate.
- Treatment
- AMF inoculatione0
- Interactor
- Rhizoglomus fasciculatumt0symbiont
- Outcome
- growth of coffee seedlingse0
- Qualifier
- intermediate levele0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“AMF inoculation can play an important role in the growth of coffee seedlings as long as the content P in soil solution maintains intermediate level.”
t0“Rhizoglomus fasciculatum”
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