Abstract
In order to ascertain the effects of potassium fertilizer application periods on apple production,we conducted a field experiment and analyzed the differences in apple yield,fruit quality,potassium fertilizer use efficiency,and nutrient concentrations in leaves and fruits among treatments with differences in timing of potassium application. The results indicated that,compared with no potassium-applied treatment( CK),all potassium fertilizer application treatments significantly increased the apple yield by 4.3%- 33.2%,meanwhile,it also obviously improved the fruit quality.In comparison with the application of 100% potassium fertilizer as a base,the application of 50% or100% of potassium fertilizer at the fruit enlargement stage( the remaining 50% applied as a base or after flowering) significantly increased the apple yield by 20. 5%- 27. 7% and improved the fruit quality. Compared with the application 100% potassium fertilizer at the stage of fruit enlargement,the evenly split application as base flowering stage and at the fruit enlargement stage not only contributed to a higher yield,better quality and higher potassium use efficiency,but also maintained a relatively stable potassium concentration level in leaves. However,the split potassium fertilizer application at the flowering and fruit enlargement stages resulted in the significant decrease in concentration of calcium in fruit,which would be negative to fruit quality. In conclusion,our research suggested that evenly split application of potassium fertilizer as a base and at the fruit enlargement stage was the suitable period for apple production in Fuji apple orchards in this region.
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Claims 8
Claim · model-written summary
Potassium application increased apple yield by 4.3%- 33.2% relative to no potassium.
- Taxon
- apple
Malus domesticae0 - Treatment
- all potassium fertilizer application treatmentse0
- Outcome
- apple yielde0
- Direction
- increasede0
- Value
- 4.3%- 33.2%e0
- Comparator
- no potassium-applied treatmente0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“compared with no potassium-applied treatment( CK),all potassium fertilizer application treatments significantly increased the apple yield by 4.3%- 33.2%”
Claim · model-written summary
Potassium application improved apple fruit quality.
- Taxon
- appleMalus domesticae0
- Treatment
- all potassium fertilizer application treatmentse0
- Outcome
- fruit qualitye0
- Direction
- improvede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“all potassium fertilizer application treatments significantly increased the apple yield by 4.3%- 33.2%,meanwhile,it also obviously improved the fruit quality.”
Claim · model-written summary
Applying 50% or 100% potassium at fruit enlargement raised apple yield by 20. 5%- 27. 7% relative to all basal application.
- Taxon
- appleMalus domesticae0
- Treatment
- application of 50% or100% of potassium fertilizer at the fruit enlargement stagee0
- Outcome
- apple yielde0
- Direction
- increasede0
- Value
- 20. 5%- 27. 7%e0
- Comparator
- application of 100% potassium fertilizer as a basee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In comparison with the application of 100% potassium fertilizer as a base,the application of 50% or100% of potassium fertilizer at the fruit enlargement stage( the remaining 50% applied as a base or after flowering) significantly increased the apple yield by 20. 5%- 27. 7%”
Claim · model-written summary
Applying 50% or 100% potassium at fruit enlargement improved fruit quality over all basal application.
- Taxon
- appleMalus domesticae0
- Treatment
- application of 50% or100% of potassium fertilizer at the fruit enlargement stagee0
- Outcome
- fruit qualitye0
- Direction
- improvede0
- Comparator
- application of 100% potassium fertilizer as a basee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In comparison with the application of 100% potassium fertilizer as a base,the application of 50% or100% of potassium fertilizer at the fruit enlargement stage( the remaining 50% applied as a base or after flowering) significantly increased the apple yield by 20. 5%- 27. 7% and improved the fruit quality.”
Claim · model-written summary
Evenly split potassium application gave higher yield, quality and potassium use efficiency than all application at fruit enlargement.
- Taxon
- appleMalus domesticat0
- Treatment
- evenly split application as base flowering stage and at the fruit enlargement stagee0
- Outcome
- yield,better quality and higher potassium use efficiencye0
- Direction
- highere0
- Comparator
- application 100% potassium fertilizer at the stage of fruit enlargemente0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Compared with the application 100% potassium fertilizer at the stage of fruit enlargement,the evenly split application as base flowering stage and at the fruit enlargement stage not only contributed to a higher yield,better quality and higher potassium use efficiency”
t0“apple”
Claim · model-written summary
Evenly split potassium application maintained relatively stable leaf potassium concentration.
- Taxon
- appleMalus domesticat0
- Treatment
- evenly split application as base flowering stage and at the fruit enlargement stagee0
- Outcome
- potassium concentration level in leavese0
- Direction
- maintained a relatively stablee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the evenly split application as base flowering stage and at the fruit enlargement stage not only contributed to a higher yield,better quality and higher potassium use efficiency,but also maintained a relatively stable potassium concentration level in leaves.”
t0“apple”
Claim · model-written summary
Split potassium application at flowering and fruit enlargement significantly lowered fruit calcium concentration.
- Taxon
- appleMalus domesticat0
- Treatment
- split potassium fertilizer application at the flowering and fruit enlargement stagese0
- Outcome
- concentration of calcium in fruite0
- Direction
- decreasee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the split potassium fertilizer application at the flowering and fruit enlargement stages resulted in the significant decrease in concentration of calcium in fruit”
t0“apple”
Claim · model-written summary
The authors recommend evenly splitting potassium as basal and fruit enlargement applications for Fuji apple orchards.
Verbatim
e0“evenly split application of potassium fertilizer as a base and at the fruit enlargement stage was the suitable period for apple production in Fuji apple orchards in this region.”
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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.