Abstract
Mango (Mangifera indica L.) is a highly perishable fruit with a short shelf life at ambient conditions, which may lead to post-harvest losses approximated to be 40-45%. This reduces returns to farmers significantly. The problem is compounded by the fact that most farmers do not have access to cold storage facilities. Nutrient management has been shown to affect postharvest characteristics of fruits. Calcium particularly plays a critical role in cell membrane integrity, tissue firmness and delays lipid catabolism. Previous studies have indicated a deficiency of calcium in some mango growing regions in Kenya. A field study was carried out to determine the effect of varied calcium formulations applied at various stages of growth on mango fruits post-harvest quality and organoleptic acceptability. The study was carried out in Embu County Eastern Kenya during seasons 2017/2018 and 2018 /2019 using “Van Dyke” cultivar, aged approximately 10 years. The experiment was set up in a randomized complete block design with a split-split plot arrangement, three trees per replication, replicated thrice. Three calcium formulations: calcium chloride, calcium nitrate and Easygro™ were applied at rates of 0%,1.0%, 1.5% and 2.0% at fruit set, 30 days after fruit set and 30 days to physiological maturity. The calcium sources formed the main plots, the timing of application formed the subplots while the rates of application formed the sub-sub plots. Total soluble solids (TSS) and percentage titratable acidity (TA) were assessed at harvest and after 12 days of storage under ambient conditions (25±2ºC, 70±5% relative humidity) using standard procedures. Selected fruits’ sensory attributes were also evaluated after storage using a hedonic scale. Analysis of data was done using the 14th Edition of the Genstat software. The differences among the means of the treatments were compared using Fisher’s Protected LSD test at 5% probability level. Fruits sprayed with calcium chloride, 2.0% at fruit set had higher TSS (6.8 º brix and 6.3º brix) (10.47 º brix and 9.10 º brix), TA (1.29% and 1.27%), (0.77% and 0.675%) than other treatments at maturity and after storage in both seasons, respectively. Calcium chloride at 2.0% level of application led to a superior peel color appearance contrary to calcium nitrate and Easygro™ also applied at 2.0%, which led to an inferior peel color appearance and an inferior taste of fruits. Therefore, calcium nitrate and easy gro should be sprayed at concentration of 1.5% for good taste and peel colour appearance. Key words: Mango, total soluble sugars, total titratable acidity, organoleptic, shelf-life
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Claims 8
Claim · model-written summary
Calcium chloride at 2.0% at fruit set gave higher TSS at maturity, 6.8 and 6.3 °Brix, than other treatments.
- Taxon
- Mangifera indica L.
_from_India.jpg?width=60)
Mangifera indicae0 - Treatment
- calcium chloride, 2.0% at fruit sete1
- Outcome
- TSSe1
- Direction
- highere1
- Value
- 6.8 º brix and 6.3º brixe1
- Comparator
- other treatmentse1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
_from_India.jpg?width=500)
Verbatim
e0“Mango (Mangifera indica L.) is a highly perishable fruit with a short shelf life”
e1“Fruits sprayed with calcium chloride, 2.0% at fruit set had higher TSS (6.8 º brix and 6.3º brix) (10.47 º brix and 9.10 º brix), TA (1.29% and 1.27%), (0.77% and 0.675%) than other treatments at maturity and after storage in both seasons, respectively”
Claim · model-written summary
Calcium chloride at 2.0% at fruit set gave higher TSS after storage, 10.47 and 9.10 °Brix, than other treatments.
- Taxon
- Mangifera indica L.Mangifera indicae0
- Treatment
- calcium chloride, 2.0% at fruit sete1
- Outcome
- TSSe1
- Direction
- highere1
- Value
- 10.47 º brix and 9.10 º brixe1
- Comparator
- other treatmentse1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Mango (Mangifera indica L.) is a highly perishable fruit with a short shelf life”
e1“Fruits sprayed with calcium chloride, 2.0% at fruit set had higher TSS (6.8 º brix and 6.3º brix) (10.47 º brix and 9.10 º brix), TA (1.29% and 1.27%), (0.77% and 0.675%) than other treatments at maturity and after storage in both seasons, respectively”
Claim · model-written summary
Calcium chloride at 2.0% at fruit set gave higher TA at maturity, 1.29% and 1.27%, than other treatments.
- Taxon
- Mangifera indica L.Mangifera indicae0
- Treatment
- calcium chloride, 2.0% at fruit sete1
- Outcome
- TAe1
- Direction
- highere1
- Value
- 1.29% and 1.27%e1
- Comparator
- other treatmentse1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Mango (Mangifera indica L.) is a highly perishable fruit with a short shelf life”
e1“Fruits sprayed with calcium chloride, 2.0% at fruit set had higher TSS (6.8 º brix and 6.3º brix) (10.47 º brix and 9.10 º brix), TA (1.29% and 1.27%), (0.77% and 0.675%) than other treatments at maturity and after storage in both seasons, respectively”
Claim · model-written summary
Calcium chloride at 2.0% at fruit set gave higher TA after storage, 0.77% and 0.675%, than other treatments.
- Taxon
- Mangifera indica L.Mangifera indicae0
- Treatment
- calcium chloride, 2.0% at fruit sete1
- Outcome
- TAe1
- Direction
- highere1
- Value
- 0.77% and 0.675%e1
- Comparator
- other treatmentse1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Mango (Mangifera indica L.) is a highly perishable fruit with a short shelf life”
e1“Fruits sprayed with calcium chloride, 2.0% at fruit set had higher TSS (6.8 º brix and 6.3º brix) (10.47 º brix and 9.10 º brix), TA (1.29% and 1.27%), (0.77% and 0.675%) than other treatments at maturity and after storage in both seasons, respectively”
Claim · model-written summary
Calcium chloride at 2.0% led to superior peel colour appearance of mango fruit.
- Taxon
- Mangifera indica L.Mangifera indicae0
- Treatment
- Calcium chloride at 2.0% level of applicatione3
- Outcome
- peel color appearancee3
- Direction
- superiore3
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Mango (Mangifera indica L.) is a highly perishable fruit with a short shelf life”
e3“Calcium chloride at 2.0% level of application led to a superior peel color appearance”
Claim · model-written summary
Calcium nitrate and Easygro at 2.0% led to inferior peel colour appearance of mango fruit compared with calcium chloride.
- Taxon
- Mangifera indica L.Mangifera indicae0
- Treatment
- calcium nitrate and Easygro™ also applied at 2.0%e4
- Outcome
- peel color appearancee4
- Direction
- inferiore4
- Comparator
- Calcium chloridee3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Mango (Mangifera indica L.) is a highly perishable fruit with a short shelf life”
e3“Calcium chloride at 2.0% level of application led to a superior peel color appearance”
e4“contrary to calcium nitrate and Easygro™ also applied at 2.0%, which led to an inferior peel color appearance and an inferior taste of fruits”
Claim · model-written summary
Calcium nitrate and Easygro at 2.0% led to inferior taste of mango fruit compared with calcium chloride.
- Taxon
- Mangifera indica L.Mangifera indicae0
- Treatment
- calcium nitrate and Easygro™ also applied at 2.0%e4
- Outcome
- taste of fruitse4
- Direction
- inferiore4
- Comparator
- Calcium chloridee3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Mango (Mangifera indica L.) is a highly perishable fruit with a short shelf life”
e3“Calcium chloride at 2.0% level of application led to a superior peel color appearance”
e4“contrary to calcium nitrate and Easygro™ also applied at 2.0%, which led to an inferior peel color appearance and an inferior taste of fruits”
Claim · model-written summary
Calcium nitrate and Easygro should be sprayed at 1.5% for good taste and peel colour appearance.
- Taxon
- Mangifera indica L.Mangifera indicae0
- Treatment
- calcium nitrate and easy gro should be sprayed at concentration of 1.5%e5
- Outcome
- good taste and peel colour appearancee5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Mango (Mangifera indica L.) is a highly perishable fruit with a short shelf life”
e5“Therefore, calcium nitrate and easy gro should be sprayed at concentration of 1.5% for good taste and peel colour appearance”
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See all 22 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.