Abstract
This research was carried out during two successive seasons of 2016 and 2017 to study the effect of pre-harvest treatments on peach trees on fruits quality at harvest time and during cold storage at 5±1°C and 80-85% RH. The selected trees for this study were chosen from locally Mit-Ghamer peach trees(cv. Medium Sultani), grown in a private orchard at Fesha-Bana village, Aga Center, Dakahllia governorate, Egypt. The selected trees of peach (cv. Medium Sultani) were sprayed Pre-harvest (1.5 month after full bloom) with one of the followings: tap water (control), 1.5% potassium sulphate (K2SO4), 2% calcium chloride (CaCl2) and the combination of them. The harvested mature fruits were cold stored at 5 ± 1°C and 80-85% relative humidity (RH) for a storage period of 24 days. Some physical and chemical quality characteristics were measured on the intact treated fruits at harvest date and at 6-day-intervals during cold storage up to 24 days. The obtained results showed that the peach fruits sprayed with 1.5% K2SO4 recorded the highest values of firmness, Vitamin C content and TSS% after 6, 12 and 18 days during The cold storage in both seasons. While, peach trees sprayed with 2% CaCl2 gave the highest values of fruit firmness at harvest time and after 24 days of cold storage, and the lowest value of fruits decay incidence%, TSS% and anthocyanin content in fruit skin in all storage periods of both seasons. Applying the combination treatment of 1.5 % K2SO4 and 2% CaCl2 showed the highest values of vitamin C, acidity and total sugars%, anthocyanin and pectic substances contents as well as the lowest value of TSS/acid ratio and weight loss% of fruit at 18 and 24 days of cold storage in both seasons. However, the opposite trends were true for the control treatment. Finally, it can be recommended applying the combination spray of 1.5 % K2SO4 and 2 % CaCl2 on peach trees at pre-harvest (1.5 month after full bloom) to improve maintaining physical and chemical qualities of peach fruits during cold storage up to 24 days.
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Claims 8
Claim · model-written summary
Potassium sulphate gave the highest firmness, vitamin C and TSS after 6, 12 and 18 days.
- Taxon
- peach
Prunus persicae0 - Treatment
- 1.5% K2SO4e0
- Outcome
- firmness, Vitamin C content and TSS%e0
- Direction
- higheste0
- Qualifier
- after 6, 12 and 18 dayse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“peach fruits sprayed with 1.5% K2SO4 recorded the highest values of firmness, Vitamin C content and TSS% after 6, 12 and 18 days during The cold storage in both seasons.”
Claim · model-written summary
Calcium chloride gave highest firmness at harvest and after 24 storage days.
- Taxon
- peachPrunus persicae0
- Treatment
- 2% CaCl2e0
- Outcome
- fruit firmnesse0
- Direction
- higheste0
- Qualifier
- at harvest time and after 24 days of cold storagee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“peach trees sprayed with 2% CaCl2 gave the highest values of fruit firmness at harvest time and after 24 days of cold storage”
Claim · model-written summary
Calcium chloride gave the lowest fruit decay incidence across storage periods.
- Taxon
- peachPrunus persicae0
- Treatment
- 2% CaCl2e0
- Outcome
- fruits decay incidence%e0
- Direction
- loweste0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“peach trees sprayed with 2% CaCl2 gave the highest values of fruit firmness at harvest time and after 24 days of cold storage, and the lowest value of fruits decay incidence%, TSS% and anthocyanin content in fruit skin in all storage periods of both seasons.”
Claim · model-written summary
Calcium chloride gave the lowest TSS and skin anthocyanin throughout storage.
- Taxon
- peachPrunus persicae0
- Treatment
- 2% CaCl2e0
- Outcome
- TSS% and anthocyanin content in fruit skine0
- Direction
- loweste0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“peach trees sprayed with 2% CaCl2 gave the highest values of fruit firmness at harvest time and after 24 days of cold storage, and the lowest value of fruits decay incidence%, TSS% and anthocyanin content in fruit skin in all storage periods of both seasons.”
Claim · model-written summary
Combined potassium sulphate and calcium chloride maximized vitamin C, acidity and total sugars at 18 and 24 days.
- Taxon
- peachPrunus persicat0
- Treatment
- combination treatment of 1.5 % K2SO4 and 2% CaCl2e0
- Outcome
- vitamin C, acidity and total sugars%e0
- Direction
- higheste0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the combination treatment of 1.5 % K2SO4 and 2% CaCl2 showed the highest values of vitamin C, acidity and total sugars%”
t0“Peach Trees”
Claim · model-written summary
The combined spray maximized anthocyanin and pectic substance contents.
- Taxon
- Peach TreesPrunus persicat0
- Treatment
- combination treatment of 1.5 % K2SO4 and 2% CaCl2e0
- Outcome
- anthocyanin and pectic substances contentse0
- Direction
- higheste0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the combination treatment of 1.5 % K2SO4 and 2% CaCl2 showed the highest values of vitamin C, acidity and total sugars%, anthocyanin and pectic substances contents”
t0“Peach Trees”
Claim · model-written summary
The combined spray minimized TSS/acid ratio and fruit weight loss at 18 and 24 days.
- Taxon
- Peach TreesPrunus persicat0
- Treatment
- combination treatment of 1.5 % K2SO4 and 2% CaCl2e0
- Outcome
- TSS/acid ratio and weight loss% of fruite0
- Direction
- loweste0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the combination treatment of 1.5 % K2SO4 and 2% CaCl2 showed the highest values of vitamin C, acidity and total sugars%, anthocyanin and pectic substances contents as well as the lowest value of TSS/acid ratio and weight loss% of fruit at 18 and 24 days of cold storage in both seasons.”
t0“Peach Trees”
Claim · model-written summary
The authors recommend a preharvest combined spray to maintain peach fruit quality for up to 24 storage days.
- Taxon
- peachPrunus persicae0
- Treatment
- combination spray of 1.5 % K2SO4 and 2 % CaCl2e0
- Outcome
- applying the combination spray of 1.5 % K2SO4 and 2 % CaCl2 on peach trees at pre-harvest (1.5 month after full bloom)e0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“it can be recommended applying the combination spray of 1.5 % K2SO4 and 2 % CaCl2 on peach trees at pre-harvest (1.5 month after full bloom) to improve maintaining physical and chemical qualities of peach fruits during cold storage up to 24 days.”
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