Abstract
Abstract Background Cotton productivity is commonly limited by the imbalanced nutritional status of phosphorus (P) and zinc (Zn) in Brazil. Evaluating the effect of the P–Zn interaction on nutrient availability in soil is crucial, as this interaction promotes plant adaptations that modify the availability of these nutrients in the rhizosphere. However, the influence of root growth on the P–Zn interaction and its adsorption in rhizosphere soil remains poorly understood. Aim We tested the interaction of P and Zn rates in two classes of soil cultivated with cotton. The aim of this investigation was to evaluate the P and Zn availability and adsorption capacity by rhizosphere soils cultivated with cotton plants subjected to P and Zn rates. Methods Cotton plants were grown under greenhouse conditions in two different soils (Entisol and Oxisol), with different P and Zn rates. Phosphorus fractionation and Zn sequential extraction were assessed in rhizosphere soil, while total P and Zn concentrations were measured in the shoot and roots. Results Soil type significantly affected the P–Zn availabilities on rhizosphere soils. Although increased P‐rates raised P‐soil availability on bulk and rhizosphere soils, cotton growth was not increased under low soil‐Zn availability. The labile inorganic P content was influenced by P and Zn rates just in Oxisol. In both soils, the Zn‐ Zn‐exchangeable content was decreased by P rates, while Zn bound to oxides increased. Conclusions Soil‐type effects on P–Zn interaction could have important implications for increasing cotton productivity. Increased cotton productivity by P application was only achieved with an adequate supply of Zn.
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Claims 7
Claim · model-written summary
Soil type affected rhizosphere phosphorus and zinc availability.
- Taxon
- cotton
Gossypium hirsutumt0 - Outcome
- P–Zn availabilitiese0
- Setting
- rhizosphere soilse0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Soil type significantly affected the P–Zn availabilities on rhizosphere soils”
t0“cotton”
Claim · model-written summary
Increasing phosphorus rates raised soil phosphorus availability.
- Taxon
- cottonGossypium hirsutumt0
- Treatment
- increased P‐ratese0
- Outcome
- P‐soil availabilitye0
- Direction
- raisede0
- Setting
- bulk and rhizosphere soilse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“increased P‐rates raised P‐soil availability on bulk and rhizosphere soils”
t0“cotton”
Claim · model-written summary
Cotton growth did not increase with increased phosphorus rates under low zinc availability.
- Taxon
- cottonGossypium hirsutume0
- Treatment
- increased P‐ratese0
- Outcome
- cotton growthe0
- Direction
- not increasede0
- Qualifier
- low soil‐Zn availabilitye0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Although increased P‐rates raised P‐soil availability on bulk and rhizosphere soils, cotton growth was not increased under low soil‐Zn availability”
Claim · model-written summary
Phosphorus and zinc rates affected labile inorganic phosphorus only in Oxisol.
- Taxon
- cottonGossypium hirsutumt0
- Treatment
- P and Zn ratese0
- Outcome
- labile inorganic P contente0
- Setting
- Oxisole0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The labile inorganic P content was influenced by P and Zn rates just in Oxisol”
t0“cotton”
Claim · model-written summary
Phosphorus rates decreased exchangeable zinc in both soils.
- Taxon
- cottonGossypium hirsutumt0
- Treatment
- P ratese0
- Outcome
- Zn‐ Zn‐exchangeable contente0
- Direction
- decreasede0
- Setting
- both soilse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In both soils, the Zn‐ Zn‐exchangeable content was decreased by P rates”
t0“cotton”
Claim · model-written summary
Phosphorus rates increased zinc bound to oxides in both soils.
- Taxon
- cottonGossypium hirsutumt0
- Treatment
- P ratese0
- Outcome
- Zn bound to oxidese0
- Direction
- increasede0
- Setting
- both soilse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In both soils, the Zn‐ Zn‐exchangeable content was decreased by P rates, while Zn bound to oxides increased”
t0“cotton”
Claim · model-written summary
Phosphorus application increased cotton productivity only with adequate zinc supply.
- Taxon
- cottonGossypium hirsutume0
- Treatment
- P applicatione0
- Outcome
- cotton productivitye0
- Direction
- Increasede0
- Qualifier
- adequate supply of Zne0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Increased cotton productivity by P application was only achieved with an adequate supply of Zn”
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