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“yield decrease”

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paper W4411860499 ✕

Intervention effectobservedoriginal resultnegativesignificant (as stated)measured

Claim · model-written summary

Potassium application decreased reducing sugar content by 16.1 %.

Taxon: PotatoSolanum tuberosumt0
Treatment: K applicatione0
Outcome: reducing sugar contente0
Direction: decreasee0
Value: 16.1 %e0
Comparator: no K applicatione0

Verbatim

e0
“K application could significantly increase the yield (19.2 %), starch content (6.7 %), crude protein content (7.9 %), vitamin C content (9.6 %), and K uptake (40.5 %), and significantly decrease the reducing sugar content (16.1 %) compared with no K application.”
✓ located verbatim in the source · abstract, characters 512–774

t0
“Potato”
✓ located after whitespace/quote normalisation · title, characters 49–55

Title

Quantitative effects of potassium application on potato tuber yield, quality, and potassium uptake in China: A meta-analysis

Fan Zhang; Xiukang Wang; Hao He; et al. Field Crops Research 2025. doi:10.1016/j.fcr.2025.110061

Other claims from this paper (14)

Intervention effect Potassium application increased potato yield by 19.2 %.
Intervention effect Potassium application increased starch content by 6.7 %.
Intervention effect Potassium application increased crude protein content by 7.9 %.
Intervention effect Potassium application increased vitamin C content by 9.6 %.
Intervention effect Potassium application increased K uptake by 40.5 %.
Association Higher rainfall and temperature favored optimal increases in tuber yield and K uptake but did not favor quality.
Intervention effect KNO 3 application improved yield more than K 2 SO 4 and KCl.
Intervention effect Split K 2 SO 4 application improved starch and vitamin C at the stated rate and density.
Intervention effect Split K 2 SO 4 application improved K uptake at the stated rate and density.
Recommendation The optimal potassium rate for northeast China was 76.1 kg ha –1.
Recommendation The optimal potassium rate for northwest China was 170.3 kg ha –1.
Recommendation The optimal potassium rate for southwest China was 168.7 kg ha –1.
Recommendation The optimal potassium rate for north China was 225.8 kg ha –1.
Recommendation The optimal potassium rate for southeast China was 146.6 kg ha –1.

Intervention effectobservedoriginal resultpositivesignificant (as stated)measured

Claim · model-written summary

Potassium application increased potato yield by 19.2 %.

Taxon: PotatoSolanum tuberosumt0
Treatment: K applicatione0
Outcome: yielde0
Direction: increasee0
Value: 19.2 %e0
Comparator: no K applicatione0

Verbatim

e0
“K application could significantly increase the yield (19.2 %), starch content (6.7 %), crude protein content (7.9 %), vitamin C content (9.6 %), and K uptake (40.5 %), and significantly decrease the reducing sugar content (16.1 %) compared with no K application.”
✓ located verbatim in the source · abstract, characters 512–774

t0
“Potato”
✓ located after whitespace/quote normalisation · title, characters 49–55

Title

Quantitative effects of potassium application on potato tuber yield, quality, and potassium uptake in China: A meta-analysis

Fan Zhang; Xiukang Wang; Hao He; et al. Field Crops Research 2025. doi:10.1016/j.fcr.2025.110061

Other claims from this paper (14)

Intervention effect Potassium application increased starch content by 6.7 %.
Intervention effect Potassium application increased crude protein content by 7.9 %.
Intervention effect Potassium application increased vitamin C content by 9.6 %.
Intervention effect Potassium application increased K uptake by 40.5 %.
Intervention effect Potassium application decreased reducing sugar content by 16.1 %.
Association Higher rainfall and temperature favored optimal increases in tuber yield and K uptake but did not favor quality.
Intervention effect KNO 3 application improved yield more than K 2 SO 4 and KCl.
Intervention effect Split K 2 SO 4 application improved starch and vitamin C at the stated rate and density.
Intervention effect Split K 2 SO 4 application improved K uptake at the stated rate and density.
Recommendation The optimal potassium rate for northeast China was 76.1 kg ha –1.
Recommendation The optimal potassium rate for northwest China was 170.3 kg ha –1.
Recommendation The optimal potassium rate for southwest China was 168.7 kg ha –1.
Recommendation The optimal potassium rate for north China was 225.8 kg ha –1.
Recommendation The optimal potassium rate for southeast China was 146.6 kg ha –1.

Intervention effectobservedoriginal resultpositivesignificant (as stated)measured

Claim · model-written summary

Potassium application increased starch content by 6.7 %.

Taxon: PotatoSolanum tuberosumt0
Treatment: K applicatione0
Outcome: starch contente0
Direction: increasee0
Value: 6.7 %e0
Comparator: no K applicatione0

Verbatim

e0
“K application could significantly increase the yield (19.2 %), starch content (6.7 %), crude protein content (7.9 %), vitamin C content (9.6 %), and K uptake (40.5 %), and significantly decrease the reducing sugar content (16.1 %) compared with no K application.”
✓ located verbatim in the source · abstract, characters 512–774

t0
“Potato”
✓ located after whitespace/quote normalisation · title, characters 49–55

Title

Quantitative effects of potassium application on potato tuber yield, quality, and potassium uptake in China: A meta-analysis

Fan Zhang; Xiukang Wang; Hao He; et al. Field Crops Research 2025. doi:10.1016/j.fcr.2025.110061

Other claims from this paper (14)

Intervention effect Potassium application increased potato yield by 19.2 %.
Intervention effect Potassium application increased crude protein content by 7.9 %.
Intervention effect Potassium application increased vitamin C content by 9.6 %.
Intervention effect Potassium application increased K uptake by 40.5 %.
Intervention effect Potassium application decreased reducing sugar content by 16.1 %.
Association Higher rainfall and temperature favored optimal increases in tuber yield and K uptake but did not favor quality.
Intervention effect KNO 3 application improved yield more than K 2 SO 4 and KCl.
Intervention effect Split K 2 SO 4 application improved starch and vitamin C at the stated rate and density.
Intervention effect Split K 2 SO 4 application improved K uptake at the stated rate and density.
Recommendation The optimal potassium rate for northeast China was 76.1 kg ha –1.
Recommendation The optimal potassium rate for northwest China was 170.3 kg ha –1.
Recommendation The optimal potassium rate for southwest China was 168.7 kg ha –1.
Recommendation The optimal potassium rate for north China was 225.8 kg ha –1.
Recommendation The optimal potassium rate for southeast China was 146.6 kg ha –1.

Intervention effectobservedoriginal resultpositivesignificant (as stated)measured

Claim · model-written summary

Potassium application increased K uptake by 40.5 %.

Taxon: PotatoSolanum tuberosumt0
Treatment: K applicatione0
Outcome: K uptakee0
Direction: increasee0
Value: 40.5 %e0
Comparator: no K applicatione0

Verbatim

e0
“K application could significantly increase the yield (19.2 %), starch content (6.7 %), crude protein content (7.9 %), vitamin C content (9.6 %), and K uptake (40.5 %), and significantly decrease the reducing sugar content (16.1 %) compared with no K application.”
✓ located verbatim in the source · abstract, characters 512–774

t0
“Potato”
✓ located after whitespace/quote normalisation · title, characters 49–55

Title

Quantitative effects of potassium application on potato tuber yield, quality, and potassium uptake in China: A meta-analysis

Fan Zhang; Xiukang Wang; Hao He; et al. Field Crops Research 2025. doi:10.1016/j.fcr.2025.110061

Other claims from this paper (14)

Intervention effect Potassium application increased potato yield by 19.2 %.
Intervention effect Potassium application increased starch content by 6.7 %.
Intervention effect Potassium application increased crude protein content by 7.9 %.
Intervention effect Potassium application increased vitamin C content by 9.6 %.
Intervention effect Potassium application decreased reducing sugar content by 16.1 %.
Association Higher rainfall and temperature favored optimal increases in tuber yield and K uptake but did not favor quality.
Intervention effect KNO 3 application improved yield more than K 2 SO 4 and KCl.
Intervention effect Split K 2 SO 4 application improved starch and vitamin C at the stated rate and density.
Intervention effect Split K 2 SO 4 application improved K uptake at the stated rate and density.
Recommendation The optimal potassium rate for northeast China was 76.1 kg ha –1.
Recommendation The optimal potassium rate for northwest China was 170.3 kg ha –1.
Recommendation The optimal potassium rate for southwest China was 168.7 kg ha –1.
Recommendation The optimal potassium rate for north China was 225.8 kg ha –1.
Recommendation The optimal potassium rate for southeast China was 146.6 kg ha –1.

Intervention effectobservedoriginal resultpositivesignificant (as stated)measured

Claim · model-written summary

Potassium application increased crude protein content by 7.9 %.

Taxon: PotatoSolanum tuberosumt0
Treatment: K applicatione0
Outcome: crude protein contente0
Direction: increasee0
Value: 7.9 %e0
Comparator: no K applicatione0

Verbatim

e0
“K application could significantly increase the yield (19.2 %), starch content (6.7 %), crude protein content (7.9 %), vitamin C content (9.6 %), and K uptake (40.5 %), and significantly decrease the reducing sugar content (16.1 %) compared with no K application.”
✓ located verbatim in the source · abstract, characters 512–774

t0
“Potato”
✓ located after whitespace/quote normalisation · title, characters 49–55

Title

Quantitative effects of potassium application on potato tuber yield, quality, and potassium uptake in China: A meta-analysis

Fan Zhang; Xiukang Wang; Hao He; et al. Field Crops Research 2025. doi:10.1016/j.fcr.2025.110061

Other claims from this paper (14)

Intervention effect Potassium application increased potato yield by 19.2 %.
Intervention effect Potassium application increased starch content by 6.7 %.
Intervention effect Potassium application increased vitamin C content by 9.6 %.
Intervention effect Potassium application increased K uptake by 40.5 %.
Intervention effect Potassium application decreased reducing sugar content by 16.1 %.
Association Higher rainfall and temperature favored optimal increases in tuber yield and K uptake but did not favor quality.
Intervention effect KNO 3 application improved yield more than K 2 SO 4 and KCl.
Intervention effect Split K 2 SO 4 application improved starch and vitamin C at the stated rate and density.
Intervention effect Split K 2 SO 4 application improved K uptake at the stated rate and density.
Recommendation The optimal potassium rate for northeast China was 76.1 kg ha –1.
Recommendation The optimal potassium rate for northwest China was 170.3 kg ha –1.
Recommendation The optimal potassium rate for southwest China was 168.7 kg ha –1.
Recommendation The optimal potassium rate for north China was 225.8 kg ha –1.
Recommendation The optimal potassium rate for southeast China was 146.6 kg ha –1.

Intervention effectobservedoriginal resultpositivesignificant (as stated)measured

Claim · model-written summary

Potassium application increased vitamin C content by 9.6 %.

Taxon: PotatoSolanum tuberosumt0
Treatment: K applicatione0
Outcome: vitamin C contente0
Direction: increasee0
Value: 9.6 %e0
Comparator: no K applicatione0

Verbatim

e0
“K application could significantly increase the yield (19.2 %), starch content (6.7 %), crude protein content (7.9 %), vitamin C content (9.6 %), and K uptake (40.5 %), and significantly decrease the reducing sugar content (16.1 %) compared with no K application.”
✓ located verbatim in the source · abstract, characters 512–774

t0
“Potato”
✓ located after whitespace/quote normalisation · title, characters 49–55

Title

Quantitative effects of potassium application on potato tuber yield, quality, and potassium uptake in China: A meta-analysis

Fan Zhang; Xiukang Wang; Hao He; et al. Field Crops Research 2025. doi:10.1016/j.fcr.2025.110061

Other claims from this paper (14)

Intervention effect Potassium application increased potato yield by 19.2 %.
Intervention effect Potassium application increased starch content by 6.7 %.
Intervention effect Potassium application increased crude protein content by 7.9 %.
Intervention effect Potassium application increased K uptake by 40.5 %.
Intervention effect Potassium application decreased reducing sugar content by 16.1 %.
Association Higher rainfall and temperature favored optimal increases in tuber yield and K uptake but did not favor quality.
Intervention effect KNO 3 application improved yield more than K 2 SO 4 and KCl.
Intervention effect Split K 2 SO 4 application improved starch and vitamin C at the stated rate and density.
Intervention effect Split K 2 SO 4 application improved K uptake at the stated rate and density.
Recommendation The optimal potassium rate for northeast China was 76.1 kg ha –1.
Recommendation The optimal potassium rate for northwest China was 170.3 kg ha –1.
Recommendation The optimal potassium rate for southwest China was 168.7 kg ha –1.
Recommendation The optimal potassium rate for north China was 225.8 kg ha –1.
Recommendation The optimal potassium rate for southeast China was 146.6 kg ha –1.

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