Abstract
Abstract Sandy soils are prone to potassium (K) leaching; therefore, developing guidelines for the optimum K application rate and fertilizer source is necessary. This research aimed to evaluate the optimum K fertilizer rates and identify the best K fertilizer sources for potato ( Solanum tuberosum L.) production, considering the impacts of insufficient or excessive fertilization on potato yield and tuber quality. The experiment was carried out on Florida sandy soil in a randomized complete block design with four replications and nine treatments, a combination of three K sources (potassium sulfate [K 2 SO 4 ], potassium chloride [KCl], and potassium magnesium sulfate [K 2 Mg 2 (SO 4 ) 3 ]) and three rates (224, 280, and 336 kg K 2 O ha −1 ). Potato tuber yield was affected by different K fertilizer sources. Applying KCl resulted in a 10.3% and 9.0% increase in marketable and total tuber yield, respectively, compared to K 2 SO 4 . However, KCl application resulted in significant tuber quality deterioration regarding lower tuber‐specific gravity. Yield and quality of potatoes were improved with the application of K₂Mg₂(SO₄)₃. No significant increase in tuber yield with increasing K rates from 224 to 336 kg K 2 O ha −1 . The highest K rate (336 kg K 2 O ha −1 ) resulted in a 10‐fold and threefold drop in tuber‐specific gravity values in 2022 and 2023, respectively, compared to 224 kg K 2 O ha −1 . These results suggest that K application rate and fertilizer source must be optimized to balance potato yield and tuber quality.
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Claims 8
Claim · model-written summary
KCl raised marketable tuber yield by 10.3% relative to potassium sulfate.
- Taxon
- potato
Solanum tuberosumt0 - Treatment
- KCle0
- Outcome
- marketable and total tuber yielde0
- Direction
- increasee0
- Value
- 10.3%e0
- Comparator
- K 2 SO 4e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Applying KCl resulted in a 10.3% and 9.0% increase in marketable and total tuber yield, respectively, compared to K 2 SO 4 .”
t0“potato”
Claim · model-written summary
KCl raised total tuber yield by 9.0% relative to potassium sulfate.
- Taxon
- potatoSolanum tuberosumt0
- Treatment
- KCle0
- Outcome
- total tuber yielde0
- Direction
- increasee0
- Value
- 9.0%e0
- Comparator
- K 2 SO 4e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Applying KCl resulted in a 10.3% and 9.0% increase in marketable and total tuber yield, respectively, compared to K 2 SO 4 .”
t0“potato”
Claim · model-written summary
KCl lowered tuber-specific gravity.
- Taxon
- potatoSolanum tuberosumt0
- Treatment
- KCle0
- Outcome
- tuber‐specific gravitye0
- Direction
- lowere0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“KCl application resulted in significant tuber quality deterioration regarding lower tuber‐specific gravity.”
t0“potato”
Claim · model-written summary
Potassium magnesium sulfate improved potato yield and quality.
- Taxon
- potatoesSolanum tuberosume0
- Treatment
- K₂Mg₂(SO₄)₃e0
- Outcome
- Yield and qualitye0
- Direction
- improvede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Yield and quality of potatoes were improved with the application of K₂Mg₂(SO₄)₃.”
Claim · model-written summary
Raising potassium from 224 to 336 kg K2O per hectare did not significantly increase tuber yield.
- Taxon
- potatoSolanum tuberosumt0
- Treatment
- increasing K rates from 224 to 336 kg K 2 O ha −1e0
- Outcome
- tuber yielde0
- Direction
- No significant increasee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“No significant increase in tuber yield with increasing K rates from 224 to 336 kg K 2 O ha −1 .”
t0“potato”
Claim · model-written summary
The highest potassium rate lowered tuber-specific gravity tenfold in 2022 relative to 224 kg K2O per hectare.
- Taxon
- potatoSolanum tuberosumt0
- Treatment
- 336 kg K 2 O ha −1e0
- Outcome
- tuber‐specific gravity valuese0
- Direction
- drope0
- Value
- 10‐folde0
- Qualifier
- 2022e0
- Comparator
- 224 kg K 2 O ha −1e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The highest K rate (336 kg K 2 O ha −1 ) resulted in a 10‐fold and threefold drop in tuber‐specific gravity values in 2022 and 2023, respectively, compared to 224 kg K 2 O ha −1 .”
t0“potato”
Claim · model-written summary
The highest potassium rate lowered tuber-specific gravity threefold in 2023 relative to 224 kg K2O per hectare.
- Taxon
- potatoSolanum tuberosumt0
- Treatment
- 336 kg K 2 O ha −1e0
- Outcome
- tuber‐specific gravity valuese0
- Direction
- drope0
- Value
- threefolde0
- Qualifier
- 2023e0
- Comparator
- 224 kg K 2 O ha −1e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The highest K rate (336 kg K 2 O ha −1 ) resulted in a 10‐fold and threefold drop in tuber‐specific gravity values in 2022 and 2023, respectively, compared to 224 kg K 2 O ha −1 .”
t0“potato”
Claim · model-written summary
The authors recommend optimizing potassium rate and source to balance yield and tuber quality.
- Taxon
- potatoSolanum tuberosume0
- Treatment
- K application rate and fertilizer sourcee0
- Outcome
- balance potato yield and tuber qualitye0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“K application rate and fertilizer source must be optimized to balance potato yield and tuber quality.”
The same questions in other papers
potassium chloride · yield · Solanum tuberosum (potato)Results differ
3 papers in the same direction as this paper · 2 in the opposite direction
- no effect
- negative
- positive
2 papers more in this group
See all 6 papers →potassium · yield · Solanum tuberosum (potato)Results differ
7 papers in the same direction as this paper · 61 in the opposite direction
- positive
- positive
- positive
65 papers more in this group
See all 69 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.