Abstract
The efficient use of phosphorus (P) fertilizers is very important in South Florida so that the environmental impact is minimal while meeting crop demand. To ensure that this is accomplished, an updated soil test P calibration is needed for sugarcane (Saccharum spp.) grown on Florida mineral soils, which accounts for almost 30% of the total sugarcane planted in the state. An outdoor pot experiment was conducted with the objective of evaluating four soil extractants for potential use in soil test P calibrations. Sugarcane cultivar CL 88–4730 was grown in 26L pots in a randomized complete block design with four replications of four P fertilizer rates (0, 38, 76, and 152 mg P L−1 soil) and four soil series (2 Spodosols, 1 Entisol, and 1 Alfisol). Sugarcane biomass was significantly increased with P fertilizer application and extractable soil P significantly increased with increasing P fertilizer rate. Strongest relationships of extractable soil P with relative fresh weight yield were determined with the water, acetic acid, and ammonium acetate extractants. All extractants tested, including Mehlich 3, had significant relationships with relative yield and leaf P concentration and so all these extractants should be considered in further field calibration studies with sugarcane on Florida mineral soils.Abbreviations: EAA: Everglades Agricultural Area; EREC: Everglades Research and Education Center; OM: organic matter; TSP: Triple superphosphate
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Claims 8
Claim · model-written summary
Phosphorus fertilizer significantly increased sugarcane biomass.
Not reportedComparator
Verbatim
e0“Sugarcane biomass was significantly increased with P fertilizer application”
t0“Sugarcane”
Claim · model-written summary
Extractable soil phosphorus increased significantly with fertilizer rate.
Not reportedComparator
Verbatim
e0“extractable soil P significantly increased with increasing P fertilizer rate”
t0“Sugarcane”
Claim · model-written summary
Water extraction had one of the strongest relationships between extractable soil phosphorus and relative fresh weight yield.
- Taxon
- Sugarcanet0
- Treatment
- watere0
- Outcome
- relationships of extractable soil P with relative fresh weight yielde0
- Comparator
- Mehlich 3e1
Not reportedValue
Verbatim
e0“Strongest relationships of extractable soil P with relative fresh weight yield were determined with the water, acetic acid, and ammonium acetate extractants.”
t0“Sugarcane”
e1“All extractants tested, including Mehlich 3, had significant relationships with relative yield and leaf P concentration”
Claim · model-written summary
Acetic acid extraction had one of the strongest relationships between extractable soil phosphorus and relative fresh weight yield.
Not reportedComparatorValue
Verbatim
e0“Strongest relationships of extractable soil P with relative fresh weight yield were determined with the water, acetic acid, and ammonium acetate extractants.”
Claim · model-written summary
Ammonium acetate extraction had one of the strongest relationships between extractable soil phosphorus and relative fresh weight yield.
- Treatment
- ammonium acetatee0
- Outcome
- relationships of extractable soil P with relative fresh weight yielde0
Not reportedComparatorValue
Verbatim
e0“Strongest relationships of extractable soil P with relative fresh weight yield were determined with the water, acetic acid, and ammonium acetate extractants.”
Claim · model-written summary
All tested extractants had significant relationships with relative yield.
Not reportedDirection
Verbatim
e0“All extractants tested, including Mehlich 3, had significant relationships with relative yield and leaf P concentration”
t0“Sugarcane”
Claim · model-written summary
All tested extractants had significant relationships with leaf phosphorus concentration.
Not reportedDirection
Verbatim
e0“All extractants tested, including Mehlich 3, had significant relationships with relative yield and leaf P concentration”
t0“Sugarcane”
Claim · model-written summary
The authors recommend considering all extractants in further field calibration studies.
Verbatim
e0“all these extractants should be considered in further field calibration studies with sugarcane on Florida mineral soils”
The same questions in other papers
fertilization · growth · Saccharum officinarum (sugarcane)Positive and negative results
128 papers in the same direction as this paper · 14 in the opposite direction · 4 reporting no difference from an alternative
- negative
- negative
- no effect
143 papers more in this group
See all 147 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.