Abstract
Potato (Solanum tuberosum L.) has low phosphorus (P) use efficiency as compared with other vegetable crops. This study was conducted at two commercial chipping potato farms (A and B) in Northeast Florida to evaluate different P rates for potato production. Plot size was 0.62 and 0.49 hectares for Farms A and B, respectively. The total trial area was 13.32 hectares per growing season for three consecutive years from 2018 to 2020. The randomized complete block design (RCBD) was employed with four replications per P rate. The chipping potato variety, ‘Atlantic’ was cultivated with three P rates: 0, 24.5, and 48.9 kg P ha−1 in 2018, and 12.2, 24.5, and 48.9 kg P ha−1 in 2019 and 2020. The soil of Farm A contained 497 mg kg−1 Mehlich-3 extractable P and 946 mg kg−1 aluminum (Al), and that of Farm B had 220 mg kg−1 Mehlich-3 extractable P and 253 mg kg−1 Al. The results showed that a P rate of 48.9 kg P ha−1 significantly improved tuber yield as compared to 0 in 2018 or 12.2 kg P ha−1 in 2019 and 2020. Application of 48.9 kg P ha−1 fertilizer P significantly increased the soil P level in 2018 and 2020, while the application of 24.5 kg P ha−1 fertilizer P increased the soil P level significantly in 2018 only. Tubers with 48.9 kg P ha−1 showed significantly lower external quality issues than 0 or 12.2 and 24.5 kg P ha−1. However, there were no significant differences in specific gravity, internal tuber quality, and tuber size among the different P rates. The tuber yield data show that potato plants grown on soil with high legacy P still require approximately 50 kg ha−1 P application for sustainable potato production in the area. This high P requirement results from the combination of high concentrations of active metals (Al and iron (Fe)) and a decrease in pH of one unit in the growing season. New P-fertilization programs with post-plant applications rather than with pre-plant application are urgently needed for minimizing P-immobilization by Al and Fe and improving P-use efficiency for potato production in the state.
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Claims 8
Claim · model-written summary
A P rate of 48.9 kg P ha−1 significantly improved tuber yield compared with 0 kg P ha−1 in 2018 or 12.2 kg P ha−1 in 2019 and 2020.
- Taxon
- Potato (Solanum tuberosum L.)
Solanum tuberosume2 - Treatment
- 48.9 kg P ha−1e1
- Outcome
- tuber yielde1
- Direction
- improvede1
- Comparator
- 0 in 2018 or 12.2 kg P ha−1 in 2019 and 2020e1
- Setting
- Northeast Floridae0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“This study was conducted at two commercial chipping potato farms (A and B) in Northeast Florida”
e1“a P rate of 48.9 kg P ha−1 significantly improved tuber yield as compared to 0 in 2018 or 12.2 kg P ha−1 in 2019 and 2020”
e2“Potato (Solanum tuberosum L.)”
Claim · model-written summary
Application of 48.9 kg P ha−1 fertilizer P significantly increased soil P level in 2018 and 2020.
- Taxon
- Potato (Solanum tuberosum L.)Solanum tuberosume2
- Treatment
- Application of 48.9 kg P ha−1 fertilizer Pe3
- Outcome
- soil P levele3
- Direction
- increasede3
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e2“Potato (Solanum tuberosum L.)”
e3“Application of 48.9 kg P ha−1 fertilizer P significantly increased the soil P level in 2018 and 2020”
Claim · model-written summary
Application of 24.5 kg P ha−1 fertilizer P significantly increased soil P level in 2018 only.
- Taxon
- Potato (Solanum tuberosum L.)Solanum tuberosume2
- Treatment
- application of 24.5 kg P ha−1 fertilizer Pe4
- Outcome
- soil P levele4
- Direction
- increasede4
- Qualifier
- in 2018 onlye4
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e2“Potato (Solanum tuberosum L.)”
e4“the application of 24.5 kg P ha−1 fertilizer P increased the soil P level significantly in 2018 only”
Claim · model-written summary
Tubers receiving 48.9 kg P ha−1 showed significantly lower external quality issues than tubers receiving 0, 12.2 or 24.5 kg P ha−1.
- Taxon
- Potato (Solanum tuberosum L.)Solanum tuberosume2
- Organ / stage
- Tuberse5
- Treatment
- 48.9 kg P ha−1e5
- Outcome
- external quality issuese5
- Direction
- lowere5
- Comparator
- 0 or 12.2 and 24.5 kg P ha−1e5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e2“Potato (Solanum tuberosum L.)”
e5“Tubers with 48.9 kg P ha−1 showed significantly lower external quality issues than 0 or 12.2 and 24.5 kg P ha−1”
Claim · model-written summary
No significant differences in specific gravity, internal tuber quality or tuber size were found among the different P rates.
- Taxon
- Potato (Solanum tuberosum L.)Solanum tuberosume2
- Treatment
- different P ratese6
- Outcome
- specific gravity, internal tuber quality, and tuber sizee6
- Direction
- no significant differencese6
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e2“Potato (Solanum tuberosum L.)”
e6“there were no significant differences in specific gravity, internal tuber quality, and tuber size among the different P rates”
Claim · model-written summary
Potato grown on high legacy P soil still requires approximately 50 kg ha−1 P application for sustainable production in the area.
- Taxon
- potatoSolanum tuberosume7
- Outcome
- P application for sustainable potato productione7
- Value
- approximately 50 kg ha−1e7
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e7“potato plants grown on soil with high legacy P still require approximately 50 kg ha−1 P application for sustainable potato production”
Claim · model-written summary
The high P requirement results from high concentrations of active metals (Al and Fe) combined with a decrease in soil pH of one unit in the growing season.
- Taxon
- Potato (Solanum tuberosum L.)Solanum tuberosume2
- Compound
- active metals (Al and iron (Fe))e7
- Outcome
- high P requiremente7
- Qualifier
- a decrease in pH of one unit in the growing seasone7
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e2“Potato (Solanum tuberosum L.)”
e7“This high P requirement results from the combination of high concentrations of active metals (Al and iron (Fe)) and a decrease in pH of one unit in the growing season”
Claim · model-written summary
New P-fertilization programs with post-plant rather than pre-plant applications are urgently needed to minimize P-immobilization by Al and Fe and improve P-use efficiency for potato.
- Taxon
- potatoSolanum tuberosume7
- Treatment
- post-plant applications rather than with pre-plant applicatione7
- Outcome
- P-fertilization programs with post-plant applicationse7
- Qualifier
- minimizing P-immobilization by Al and Fee7
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e7“New P-fertilization programs with post-plant applications rather than with pre-plant application are urgently needed for minimizing P-immobilization by Al and Fe and improving P-use efficiency for potato production in the state”
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