Abstract
Abstract BACKGROUND Nitrogen is a key component of crop production and is commonly related to increases in yield and fruit size. The N fertilization rates used for low‐chill peach cultivars were adapted from other peach production regions, where environmental and soil conditions are different. The growth and production as well as the effect on fruit physical and compositional attributes of two low‐chill peach cultivars – ‘TropicBeauty’ (TB) and ‘UFSharp’ (UFS) – with five different N fertilization rates (0 (N0), 45 (N1), 90 (N2), 179 (N3) and 269 (N4) kg ha −1 applied each year from 2011 to 2017) were examined. RESULTS Peach trees under higher N rates had higher pruning weights compared to the lower N0 or N1 rates. Yield was only affected in 2017 for the two cultivars tested. Physical attributes were inconsistently affected by N. Fruit from the higher N rates had lower a * value (more green) than fruit from the trees under low or zero N. While fruit firmness was not affected by N, fruit from trees under zero/low N had higher total soluble solids in some years. CONCLUSION Considering that N is recycled in the trees, being retained and reused each season to resume growth, it is important to address peach orchard fertilization based on peach tree N status. The results of this experiment show that an increase in N beyond what is required for tree maintenance does not increase yield. In addition, reducing N does not strongly affect fruit quality, although the color and soluble solids results suggest that lower N rates may advance fruit maturation. © 2019 Society of Chemical Industry
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Claims 10
Claim · model-written summary
Higher nitrogen rates increased pruning weight versus lower N0 or N1 rates.
- Taxon
- peach
Prunus persicat0 - Treatment
- higher N ratese0
- Outcome
- pruning weightse0
- Direction
- highere0
- Comparator
- lower N0 or N1 ratese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“peach”
e0“Peach trees under higher N rates had higher pruning weights compared to the lower N0 or N1 rates.”
Claim · model-written summary
Nitrogen affected yield only in 2017 for both tested cultivars.
- Taxon
- peachPrunus persicat0
- Treatment
- Ne0
- Outcome
- Yielde0
- Qualifier
- only affected in 2017 for the two cultivars testede0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“peach”
e0“Yield was only affected in 2017 for the two cultivars tested.”
Claim · model-written summary
Nitrogen inconsistently affected physical fruit attributes.
- Taxon
- peachPrunus persicat0
- Treatment
- Ne0
- Outcome
- Physical attributese0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“peach”
e0“Physical attributes were inconsistently affected by N.”
Claim · model-written summary
Higher nitrogen rates lowered fruit a star color value relative to low or zero nitrogen.
- Taxon
- peachPrunus persicat0
- Treatment
- higher N ratese0
- Outcome
- a * valuee0
- Direction
- lowere0
- Comparator
- low or zero Ne0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“peach”
e0“Fruit from the higher N rates had lower a * value (more green) than fruit from the trees under low or zero N.”
Claim · model-written summary
Nitrogen did not affect fruit firmness.
- Taxon
- peachPrunus persicat0
- Treatment
- Ne0
- Outcome
- fruit firmnesse0
- Direction
- not affectede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“peach”
e0“fruit firmness was not affected by N”
Claim · model-written summary
Zero or low nitrogen gave higher total soluble solids in some years.
- Taxon
- peachPrunus persicat0
- Treatment
- zero/low Ne0
- Outcome
- total soluble solidse0
- Direction
- highere0
- Qualifier
- in some yearse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“peach”
e0“fruit from trees under zero/low N had higher total soluble solids in some years.”
Claim · model-written summary
Nitrogen beyond tree maintenance requirements did not increase yield.
- Taxon
- peachPrunus persicat0
- Treatment
- an increase in N beyond what is required for tree maintenancee0
- Outcome
- yielde0
- Direction
- does not increasee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“peach”
e0“an increase in N beyond what is required for tree maintenance does not increase yield.”
Claim · model-written summary
Reducing nitrogen did not strongly affect fruit quality.
- Taxon
- peachPrunus persicat0
- Treatment
- reducing Ne0
- Outcome
- fruit qualitye0
- Direction
- does not strongly affecte0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“peach”
e0“reducing N does not strongly affect fruit quality, although the color and soluble solids results suggest that lower N rates may advance fruit maturation.”
Claim · model-written summary
Lower nitrogen rates may advance fruit maturation.
- Taxon
- peachPrunus persicat0
- Treatment
- lower N ratese0
- Outcome
- fruit maturatione0
- Direction
- may advancee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“peach”
e0“reducing N does not strongly affect fruit quality, although the color and soluble solids results suggest that lower N rates may advance fruit maturation.”
Claim · model-written summary
The authors recommend basing orchard fertilization on peach tree nitrogen status.
- Taxon
- peachPrunus persicat0
- Outcome
- peach orchard fertilization based on peach tree N statuse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“peach”
e0“it is important to address peach orchard fertilization based on peach tree N status.”
The same questions in other papers
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- no effect
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See all 13 papers →nitrogen · quality: postharvest · Prunus persica (peach)Positive and negative results
2 papers in the same direction as this paper · 4 in the opposite direction
- positive
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See all 7 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.