CN109169874A - A kind of citrus post-harvest fresh-keeping method - Google Patents
A kind of citrus post-harvest fresh-keeping method Download PDFInfo
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- CN109169874A CN109169874A CN201811145187.9A CN201811145187A CN109169874A CN 109169874 A CN109169874 A CN 109169874A CN 201811145187 A CN201811145187 A CN 201811145187A CN 109169874 A CN109169874 A CN 109169874A
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- A—HUMAN NECESSITIES
- A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
- A23B—PRESERVING, e.g. BY CANNING, MEAT, FISH, EGGS, FRUIT, VEGETABLES, EDIBLE SEEDS; CHEMICAL RIPENING OF FRUIT OR VEGETABLES; THE PRESERVED, RIPENED, OR CANNED PRODUCTS
- A23B7/00—Preservation or chemical ripening of fruit or vegetables
- A23B7/14—Preserving or ripening with chemicals not covered by groups A23B7/08 or A23B7/10
- A23B7/153—Preserving or ripening with chemicals not covered by groups A23B7/08 or A23B7/10 in the form of liquids or solids
- A23B7/154—Organic compounds; Microorganisms; Enzymes
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- A—HUMAN NECESSITIES
- A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
- A23B—PRESERVING, e.g. BY CANNING, MEAT, FISH, EGGS, FRUIT, VEGETABLES, EDIBLE SEEDS; CHEMICAL RIPENING OF FRUIT OR VEGETABLES; THE PRESERVED, RIPENED, OR CANNED PRODUCTS
- A23B7/00—Preservation or chemical ripening of fruit or vegetables
- A23B7/16—Coating with a protective layer; Compositions or apparatus therefor
Abstract
The invention discloses a kind of citrus post-harvest fresh-keeping methods, are related to fruit freshness preserving technical field.The method includes fruit harvesting, fruits just to handle, fruit depths reason, vanning storage；Wherein, it is with the chemicals treatment fruit containing purple sweet potato extract and glutathione that fruit, which is just handled, and fruit depths reason is handled with the antistaling agent of extract containing Herba Ephedrae, mulberry-leaf extract, Megranate Seed P.E, tamarind extract, calcium chloride.Preservation method of the present invention can not only press down the fungal disease for killing citrus, prevent fruit rot, moreover it is possible to reduce fruit water and nutriment is lost, effectively prevent pericarp shrinkage, fruit softens, the phenomenon that nutriments such as pulp organic acid, carbohydrate, protein significantly reduce, maintains appearance and quality.
Description
[technical field]
The present invention relates to fruit freshness preserving technical fields, and in particular to a kind of citrus post-harvest fresh-keeping method.
[background technique]
Citrus is the general name of tangerine, mandarin orange, orange, lemon, shaddock etc., is the biggish a kind of fruit of population.Citrus is not climacteric
Type fruit will not generate respiratory climacteric because border changes after adopting, to abruptly enter declining period.But citrus is easy to after adopting by true
Bacterium infects and rots, it is necessary to carry out preservative treatment.Citrus, which adopts the rear common disease that infects, has penicilliosis, green mould, the brown base of a fruit rotten
Disease, black blossom-end rot, black spot, gray mold.The medicament that control citrus fungal disease uses at present is main are as follows: benzimidazole
(carbendazim, thiophanate methyl, turkdo), imidazoles (fresh Garrick, flutter it is mould spirit, P applied levels), imazalil (dimension it is fresh, how fresh fruit is, ten thousand
It is sharp, to wear azoles mould), biguanides salt (bellkute) and their mixture.But these medicaments use rear toxic residual, with
Food safety get more and more attention, people have invested sight food preservative, the natural plants antimicrobial extract etc. of safety,
It is mentioned as a kind of citrus comprising loquat-leaf extract of CN201810233263.5 is adopted rear plant antistaling agent and disclosed using loguat leaf
It takes object to carry out with other composite reagents fresh-keeping, is mentioned as a kind of citrus fruit antistaling agent of CN201610709949.8 discloses plant
Object is taken to carry out fresh-keeping, but these plant antistaling agents have ignored mandarin orange to inhibit citrus to adopt based on rear fungal disease occurs
Raising in terms of the qualities such as pool, nutrition, although inhibiting disease generation that can improve Quality Parameters in Orange to a certain extent, since fruit is de-
From nutrition and moisture source is lacked after elite stand, in addition rising and respiration, will appear pericarp shrinkage, fruit becomes after a period of time
It is soft, it the phenomenon that nutriments such as pulp organic acid, carbohydrate, protein significantly reduce, even if not falling ill corruption, can similarly lose
Gloss and nutriment, cause quality to reduce.It is had some limitations so above-mentioned plant extracts is fresh-keeping, although can protect
Demonstrate,prove disease-free, but color dimness and nutrition loss phenomenon still occurs in fruit, is unable to reach good fresh-keeping effect, therefore find
Can natural plants anti-corrosive fresh-keeping product or technological means antibacterial but also that promote quality, be the weight of the fresh-keeping work of current citrus
Point.
[summary of the invention]
In view of the above-mentioned problems, the antistaling agent and preservation method are not only the present invention provides a kind of citrus post-harvest fresh-keeping method
The fungal disease for killing citrus can be pressed down, prevent fruit rot, moreover it is possible to reduce fruit water and nutriment is lost, effectively prevent pericarp
The phenomenon that shrinkage, fruit soften, and the nutriments such as pulp organic acid, carbohydrate, protein significantly reduce, maintains appearance and product
Matter.
In order to solve the above technical problems, The technical solution adopted by the invention is as follows:
A kind of citrus post-harvest fresh-keeping method, comprising the following steps:
(1) it fruit harvesting: selects fruit face colouring rate to be harvested for the citrusfruit of 80-90%, is placed at shady and cool ventilation
Field heat is dispersed, it is spare；
(2) fruit is just handled: above-mentioned fruit surface is uniformly sprayed at medicament, after the medicament of fruit surface air-dries, after
Continuous sprinkling medicament, repeats sprinkling 2-3 times, the medicament is mainly by purple sweet potato extract, glutathione and water with 80-100:1:1000
Weight proportion be blended；
(3) fruit depths is managed: by just treated, citrusfruit is put into antistaling agent sufficiently soaks, and is taken out, natural air drying,
Make the film of fruit surface covering layer of transparent；The antistaling agent includes the raw material of following parts by weight: Herba Ephedrae extract 1-5
Part, 4-8 parts of mulberry-leaf extract, 1-4 parts of Megranate Seed P.E, 4-8 parts of tamarind extract, 0.5-1.5 parts of calcium chloride and water 100-
200 parts；The antistaling agent after first heating water to 90-100 DEG C, is added tamarind and mentions the preparation method comprises the following steps: based on above-mentioned parts by weight
Object and calcium chloride are taken, is mixed evenly, it is cooling, and together with Herba Ephedrae extract, mulberry-leaf extract and Megranate Seed P.E
Be put into high-shear emulsion machine stir 2-4h to get；
(4) vanning storage: will deep treated fruit single fruit bagging, vanning is placed in ventilation library and stores, control ventilation library
Temperature is 12-18 DEG C, relative humidity 70-85%.
Further, in step (2), pH is first adjusted to 9-11 using preceding by the medicament.
Further, in step (2), the purple sweet potato method for preparing extractive are as follows: by purple sweet potato peeling, drying, be crushed into powder
End, after the water of powder and 2-3 times of weight is mixed into slurries, high-temperature sterilization is cooling, is inoculated with the slurry weight 0.1-0.3%
Aspergillus niger, the shaking table culture 20-40h at 30-35 DEG C, stop culture, be added slurries 1-2 times of weight mass fraction be 80-
90% ethanol solution, stir 20-30min, centrifugation, take upper liquid be concentrated into the 1/3 of original volume to get.The purple sweet potato extract
Middle anthocyanidin content is 100-115mg/L, ferrous ion 10-20 μ g/L, selenium element 0.07-0.09 μ g/L.
Further, in step (3), the Herba Ephedrae method for preparing extractive are as follows: Herba Ephedrae complete stool is cut into broken section, is added
8-10 times is measured water, decocts 1-2h, repeats to decoct 2-3 times, merges decoction liquor, cooling, and pH is adjusted to 9-11, is measured with 2-3 times
Toluene extracts at 60-70 DEG C, extract liquor pH is adjusted to 7 with 2% oxalic acid solution, after separating toluene layer, at 70 DEG C
Be concentrated under reduced pressure, be cooled to crystallization and be precipitated, centrifugation, take precipitating dry to get.The Herba Ephedrae extract Ephedrine content is
0.5-1mg/L。
Further, in step (3), the mulberry-leaf extract is added 3-6 times and measures the preparation method comprises the following steps: mulberry leaf is taken to crush
Mass fraction is ultrasonic extraction 20-30min in the ethanol solution of 60-80%, is filtered, and filtrate is concentrated under reduced pressure at 60-70 DEG C
Original volume 1/2 to get.The mulberry leaf grass extract Content of Chlorogenic Acid is 7-14mg/L；Rutin sophorin amount is 9-15mg/L.
Further, in step (3), the Megranate Seed P.E the preparation method comprises the following steps: pomegranate seed is dry, grind, be put into
Extract in axe using supercritical carbon dioxide as solvent, extract 1-2h at 20MPa, 50 DEG C, collect extract liquor to get.The stone
Palmitic acid content is 50-80mg/L in pomegranate seed extract.
Further, in step (3), the tamarind method for preparing extractive are as follows: by tamarind seed drying, crush, add 3-5
Times amount water, is heated to boiling, after keeping boiling 1-2h, is cooled to 80-90 DEG C, stands 1-2h, be concentrated into original volume 1/3 to get.
Polyoses content is 100-140mg/L in the tamarind extract.
Compared with prior art, the invention has the following beneficial effects:
The present invention can not only press down the fungal disease for killing citrus, prevent fruit rot, moreover it is possible to reduce fruit water and nutrients
Mass flow is lost, and effectively prevent pericarp shrinkage, fruit to soften, what the nutriments such as pulp organic acid, carbohydrate, protein significantly reduced shows
As maintaining appearance and quality.During fruit is just handled, purple sweet potato extract and glutathione interaction be can inhibit after citrus adopts
Fruit enzymatic reaction prevents the decomposition of nutritional ingredient to utilize, effectively reduces pulp nutrient loss；Fruit depths reason
In, Herba Ephedrae extract can not only press down antifungal growth, moreover it is possible to which reducing pericarp surface acidity (has the pericarp of wound to be easy corruption to produce
Acid), germ caused by preventing pericarp to be corroded is infected；Mulberry-leaf extract can destroy fungal cell's membrane structure, inhibit cell enzyme activity,
It is set to lose the defencive function of the barrier of cell membrane and enzyme system；Megranate Seed P.E not only can inhibit bacterial growth, moreover it is possible to inhibit
Pulp enzyme activity reduces respiration, delayed fruit after-ripening；Tamarind extract can not only form a film, moreover it is possible to be retained, prevent pericarp moisture
It scatters and disappears and pericarp nutriment decomposes；Calcium chloride can increase the permeability of film, and preventing fruit from anaerobic respiration occurs causes to go bad；Cause
This, just processing manages collective effect with depths, maintains the appearance and quality of fruit, 3 month consequence fresh-keeping using the method for the present invention
Real to lose water rate≤10, fruit is plentiful full, does not soften, and pericarp color is bright-coloured, the nutrients such as pulp organic acid, carbohydrate and protein
Matter changes of contents is little, and flavor and taste remain unchanged, and commodity rate is good.
[specific embodiment]
A specific embodiment of the invention is described further with reference to embodiments.
Embodiment 1
A kind of citrus post-harvest fresh-keeping method of the present embodiment, comprising the following steps:
(1) fruit harvesting: selecting fruit face colouring rate to be harvested for 80% citrusfruit, is placed at shady and cool ventilation and disperses
Field heat, it is spare.
(2) fruit is just handled: above-mentioned fruit surface is uniformly sprayed at medicament, after the medicament of fruit surface air-dries, after
Continuous sprinkling medicament, repeats sprinkling 2 times, the medicament is mainly by purple sweet potato extract, glutathione and water with the weight of 80:1:1000
Proportion is blended；PH is first adjusted to 9 using preceding by the medicament；The purple sweet potato method for preparing extractive are as follows: remove the peel purple sweet potato,
Drying is ground into powder, and after the water of powder and 2 times of weight is mixed into slurries, high-temperature sterilization is cooling, is inoculated with the slurries weight
The aspergillus niger of amount 0.1%, the shaking table culture 20h at 30 DEG C stop culture, and the mass fraction that 1 times of weight of slurries is added is 80%
Ethanol solution, stir 20min, centrifugation, take upper liquid be concentrated into the 1/3 of original volume to get.Anthocyanidin in the purple sweet potato extract
Content is 100mg/L, 10 μ g/L of ferrous ion, 0.07 μ g/L of selenium element.
(3) fruit depths is managed: by just treated, citrusfruit is put into antistaling agent sufficiently soaks, and is taken out, natural air drying,
Make the film of fruit surface covering layer of transparent；The antistaling agent includes the raw material of following parts by weight: 1 part of Herba Ephedrae extract,
4 parts of mulberry-leaf extract, 1 part of Megranate Seed P.E, 4 parts of tamarind extract, 0.5 part of calcium chloride and 100 parts of water；The antistaling agent system
Preparation Method are as follows: based on above-mentioned parts by weight, after first heating water to 90 DEG C, tamarind extract and calcium chloride is added, is mixed
Uniformly, cooling, and be put into high-shear emulsion machine and stir together with Herba Ephedrae extract, mulberry-leaf extract and Megranate Seed P.E
2h to get.
(4) vanning storage: will deep treated fruit single fruit bagging, vanning is placed in ventilation library and stores, control ventilation library
Temperature is 12 DEG C, relative humidity 70%.
The Herba Ephedrae method for preparing extractive are as follows: Herba Ephedrae complete stool is cut into broken section, adds 8 times of amount water, decocts 1h, is repeated
It decocts 2 times, merges decoction liquor, it is cooling, pH is adjusted to 9, the toluene measured with 2 times extracts at 60 DEG C, with 2% oxalic acid solution
Extract liquor pH is adjusted to 7, after separating toluene layer, is concentrated under reduced pressure at 70 DEG C, crystallization is cooled to and is precipitated, centrifugation takes precipitating
It is dry to get.The Herba Ephedrae extract Ephedrine content is 0.5mg/L.
For the mulberry-leaf extract the preparation method comprises the following steps: mulberry leaf is taken to crush, the ethyl alcohol that the mass fraction that 3 times of amounts are added is 60% is molten
In liquid, ultrasonic extraction 20min, filtering, filtrate be concentrated under reduced pressure at 60 DEG C original volume 1/2 to get.The mulberry leaf grass extract
Content of Chlorogenic Acid is 7mg/L；Rutin sophorin amount is 9mg/L.
The Megranate Seed P.E the preparation method comprises the following steps: pomegranate seed is dry, grind, be put into extraction axe with overcritical dioxy
Change carbon is solvent, extracts 1h at 20MPa, 50 DEG C, collect extract liquor to get.Palmitic acid content in the Megranate Seed P.E
For 50mg/L.
The tamarind method for preparing extractive are as follows: by tamarind seed drying, crush, add 3 times of amount water, be heated to boiling, protect
After holding boiling 1h, be cooled to 80 DEG C, stand 1h, be concentrated into original volume 1/3 to get.Polyoses content is in the tamarind extract
100mg/L。
Embodiment 2
A kind of citrus post-harvest fresh-keeping method of the present embodiment, comprising the following steps:
(1) fruit harvesting: selecting fruit face colouring rate to be harvested for 90% citrusfruit, is placed at shady and cool ventilation and disperses
Field heat, it is spare.
(2) fruit is just handled: above-mentioned fruit surface is uniformly sprayed at medicament, after the medicament of fruit surface air-dries, after
Continuous sprinkling medicament, repeats sprinkling 3 times, the medicament is mainly by purple sweet potato extract, glutathione and water with the weight of 100:1:1000
Amount proportion is blended；PH is first adjusted to 11 using preceding by the medicament；The purple sweet potato method for preparing extractive are as follows: go purple sweet potato
Skin, is ground into powder at drying, and after the water of powder and 3 times of weight is mixed into slurries, high-temperature sterilization is cooling, is inoculated with the slurries
The aspergillus niger of weight 0.3%, the shaking table culture 40h at 35 DEG C stop culture, and the mass fraction that 2 times of weight of slurries is added is
90% ethanol solution, stir 30min, centrifugation, take upper liquid be concentrated into the 1/3 of original volume to get.Flower in the purple sweet potato extract
Green cellulose content is 115mg/L, 20 μ g/L of ferrous ion, 0.09 μ g/L of selenium element.
(3) fruit depths is managed: by just treated, citrusfruit is put into antistaling agent sufficiently soaks, and is taken out, natural air drying,
Make the film of fruit surface covering layer of transparent；The antistaling agent includes the raw material of following parts by weight: 5 parts of Herba Ephedrae extract,
8 parts of mulberry-leaf extract, 4 parts of Megranate Seed P.E, 8 parts of tamarind extract, 1.5 parts of calcium chloride and 200 parts of water；The antistaling agent system
Preparation Method are as follows: based on above-mentioned parts by weight, after first heating water to 100 DEG C, tamarind extract and calcium chloride is added, is mixed
Uniformly, cooling, and be put into high-shear emulsion machine and stir together with Herba Ephedrae extract, mulberry-leaf extract and Megranate Seed P.E
4h to get.
(4) vanning storage: will deep treated fruit single fruit bagging, vanning is placed in ventilation library and stores, control ventilation library
Temperature is 18 DEG C, relative humidity 85%.
The Herba Ephedrae method for preparing extractive are as follows: Herba Ephedrae complete stool is cut into broken section, adds 10 times of amount water, decocts 2h, weight
It decocts 3 times again, merges decoction liquor, it is cooling, pH is adjusted to 11, the toluene measured with 3 times extracts at 70 DEG C, with 2% oxalic acid
Extract liquor pH is adjusted to 7 by solution, after separating toluene layer, is concentrated under reduced pressure at 70 DEG C, is cooled to crystallization and is precipitated, and centrifugation takes
Precipitating it is dry to get.The Herba Ephedrae extract Ephedrine content is 1mg/L.
For the mulberry-leaf extract the preparation method comprises the following steps: mulberry leaf is taken to crush, the ethyl alcohol that the mass fraction that 6 times of amounts are added is 80% is molten
In liquid, ultrasonic extraction 30min, filtering, filtrate be concentrated under reduced pressure at 70 DEG C original volume 1/2 to get.The mulberry leaf grass extract
Content of Chlorogenic Acid is 14mg/L；Rutin sophorin amount is 15mg/L.
The Megranate Seed P.E the preparation method comprises the following steps: pomegranate seed is dry, grind, be put into extraction axe with overcritical dioxy
Change carbon is solvent, extracts 2h at 20MPa, 50 DEG C, collect extract liquor to get.Palmitic acid content in the Megranate Seed P.E
For 80mg/L.
The tamarind method for preparing extractive are as follows: by tamarind seed drying, crush, add 5 times of amount water, be heated to boiling, protect
After holding boiling 2h, be cooled to 90 DEG C, stand 2h, be concentrated into original volume 1/3 to get.Polyoses content is in the tamarind extract
140mg/L。
Embodiment 3
A kind of citrus post-harvest fresh-keeping method of the present embodiment, comprising the following steps:
(1) fruit harvesting: selecting fruit face colouring rate to be harvested for 85% citrusfruit, is placed at shady and cool ventilation and disperses
Field heat, it is spare.
(2) fruit is just handled: above-mentioned fruit surface is uniformly sprayed at medicament, after the medicament of fruit surface air-dries, after
Continuous sprinkling medicament, repeats sprinkling 3 times, the medicament is mainly by purple sweet potato extract, glutathione and water with the weight of 90:1:1000
Proportion is blended；PH is first adjusted to 10 using preceding by the medicament；The purple sweet potato method for preparing extractive are as follows: go purple sweet potato
Skin, is ground into powder at drying, and after the water of powder and 2.5 times of weight is mixed into slurries, high-temperature sterilization is cooling, is inoculated with the slurry
The aspergillus niger of liquid weight 0.2%, the shaking table culture 30h at 33 DEG C stop culture, and the mass fraction of 1.5 times of weight of slurries is added
For 85% ethanol solution, stir 25min, centrifugation, take upper liquid be concentrated into the 1/3 of original volume to get.In the purple sweet potato extract
Anthocyanidin content is 113mg/L, 14 μ g/L of ferrous ion, 0.08 μ g/L of selenium element.
(3) fruit depths is managed: by just treated, citrusfruit is put into antistaling agent sufficiently soaks, and is taken out, natural air drying,
Make the film of fruit surface covering layer of transparent；The antistaling agent includes the raw material of following parts by weight: 4 parts of Herba Ephedrae extract,
6 parts of mulberry-leaf extract, 3 parts of Megranate Seed P.E, 7 parts of tamarind extract, 1 part of calcium chloride and 150 parts of water；The antistaling agent preparation
Method are as follows: based on above-mentioned parts by weight, after first heating water to 95 DEG C, tamarind extract and calcium chloride is added, is mixed equal
It is even, it is cooling, and be put into high-shear emulsion machine and stir together with Herba Ephedrae extract, mulberry-leaf extract and Megranate Seed P.E
3h to get.
(4) vanning storage: will deep treated fruit single fruit bagging, vanning is placed in ventilation library and stores, control ventilation library
Temperature is 15 DEG C, relative humidity 80%.
The Herba Ephedrae method for preparing extractive are as follows: Herba Ephedrae complete stool is cut into broken section, adds 9 times of amount water, decocts 1.5h, weight
It decocts 3 times again, merges decoction liquor, it is cooling, pH is adjusted to 10, the toluene measured with 2.5 times extracts at 65 DEG C, with 2% grass
Extract liquor pH is adjusted to 7 by acid solution, after separating toluene layer, is concentrated under reduced pressure at 70 DEG C, is cooled to crystallization and is precipitated, centrifugation,
Take precipitating dry to get.The Herba Ephedrae extract Ephedrine content is 0.6mg/L.
For the mulberry-leaf extract the preparation method comprises the following steps: mulberry leaf is taken to crush, the ethyl alcohol that the mass fraction that 5 times of amounts are added is 70% is molten
In liquid, ultrasonic extraction 25min, filtering, filtrate be concentrated under reduced pressure at 65 DEG C original volume 1/2 to get.The mulberry leaf grass extract
Content of Chlorogenic Acid is 10mg/L；Rutin sophorin amount is 12mg/L.
The Megranate Seed P.E the preparation method comprises the following steps: pomegranate seed is dry, grind, be put into extraction axe with overcritical dioxy
Change carbon is solvent, extracts 1.5h at 20MPa, 50 DEG C, collect extract liquor to get.Palmitinic acid contains in the Megranate Seed P.E
Amount is 70mg/L.
The tamarind method for preparing extractive are as follows: by tamarind seed drying, crush, add 4 times of amount water, be heated to boiling, protect
After holding boiling 1.5h, be cooled to 85 DEG C, stand 1.5h, be concentrated into original volume 1/3 to get.Polysaccharide contains in the tamarind extract
Amount is 132mg/L.
Control group 1: the first processing step of fruit replaces chemicals treatment with water, and fruit depth processing step is fresh-keeping with being replaced with water
Agent, other steps are same as Example 1.
Control group 2: the first processing step of fruit replaces chemicals treatment with water, other steps are same as Example 1.
Control group 3: purple sweet potato extract is free of in the first processing step medicament of fruit, other steps are same as Example 1.
Control group 4: glutathione is free of in the first processing step medicament of fruit, other steps are same as Example 1.
Control group 5: fruit depth processing step replaces antistaling agent with biguanides salt (bellkute), other steps are and embodiment
1 is identical.
Control group 6: fruit depth processing step antistaling agent is free of Herba Ephedrae extract, mulberry-leaf extract；Other steps with
Embodiment 1 is identical.
Control group 7: fruit depth processing step antistaling agent is free of Megranate Seed P.E, tamarind extract；Other steps with
Embodiment 1 is identical.
Control group 8: fruit depth processing step antistaling agent is free of Herba Ephedrae extract, Megranate Seed P.E, calcium chloride；Other
Step is same as Example 1.
Control group 9: fruit depth processing step antistaling agent is free of mulberry-leaf extract, tamarind extract, calcium chloride；Other steps
It is same as Example 1.
Each embodiment and the fresh-keeping fruit used of control group are the same a collection of crystal sugar orange of Debao, Guangxi county fruit plantation,
Each group sets 3 repetitions, and entire experiment is repeated 3 times, each to repeat to count each group after fresh-keeping fruit number is 100,3 months
Percentage of water loss and rotting rate, average.Wherein, the fruit for having scab and malakoplakia is considered as decayed fruit, percentage of water loss=(store preceding fruit
Fruit quality after quality-storage) the preceding fruit quality of/storage, rotting rate=the number of sick fruits/for formula the total number of fruits.It the results are shown in Table 1, and detect reality
Example 1 and the fresh-keeping front and back soluble sugar of each control group, total acid and change in protein situation are applied, the results are shown in Table 2.
1 each group fruit dehydration of table and Decay
The storage of table 2 front and back nutrition content situation of change
From Tables 1 and 2 it is found that processing at the beginning of the present invention manages collective effect with depths, the appearance and quality of fruit are maintained, is made
Fresh-keeping with the method for the present invention, fruit loses water rate≤10 after 3 months, and fruit is plentiful full, does not soften, and pericarp color is bright-coloured, pulp
Less, flavor and taste remain unchanged the variation of the nutrition contents such as organic acid, carbohydrate and protein, and commodity rate is good.
Above description is the detailed description for the present invention preferably possible embodiments, but embodiment is not limited to this hair
Bright patent claim, it is all the present invention suggested by technical spirit under completed same changes or modifications change, should all belong to
In the covered the scope of the patents of the present invention.
Claims (7)
1. a kind of citrus post-harvest fresh-keeping method, it is characterised in that: the following steps are included:
(1) fruit harvesting: selecting fruit face colouring rate to be harvested for the citrusfruit of 80-90%, is placed at shady and cool ventilation and disperses
Field heat, it is spare；
(2) fruit is just handled: being uniformly sprayed at above-mentioned fruit surface with medicament, after the medicament of fruit surface air-dries, is continued to spray
Medicament is spilt, repeats sprinkling 2-3 times, the medicament is mainly by purple sweet potato extract, glutathione and water with the weight of 80-100:1:1000
Amount proportion is blended；
(3) fruit depths is managed: by just treated, citrusfruit is put into antistaling agent sufficiently soaks, and is taken out, natural air drying makes fruit
The film of real surface covering layer of transparent；The antistaling agent includes the raw material of following parts by weight: 1-5 parts of Herba Ephedrae extract, mulberry
4-8 parts of leaf extract, 1-4 parts of Megranate Seed P.E, 4-8 parts of tamarind extract, 0.5-1.5 parts of calcium chloride and 100-200 parts of water；
The antistaling agent is the preparation method comprises the following steps: based on above-mentioned parts by weight, after first heating water to 90-100 DEG C, be added tamarind extract and
Calcium chloride is mixed evenly, cooling, and is put into height together with Herba Ephedrae extract, mulberry-leaf extract and Megranate Seed P.E
In emulsification pretreatment machine stir 2-4h to get；
(4) vanning storage: will deep treated fruit single fruit bagging, vanning is placed in ventilation library and stores, control ventilation library temperature
It is 12-18 DEG C, relative humidity 70-85%.
2. a kind of citrus post-harvest fresh-keeping method according to claim 1, it is characterised in that: in step (2), the medicament makes
PH is first adjusted to 9-11 with preceding.
3. a kind of citrus post-harvest fresh-keeping method according to claim 1, it is characterised in that: in step (2), the purple sweet potato is mentioned
Take object the preparation method comprises the following steps: by purple sweet potato peeling, it is dry, be ground into powder, after the water of powder and 2-3 times of weight is mixed into slurries,
High-temperature sterilization, it is cooling, it is inoculated with the aspergillus niger of the slurry weight 0.1-0.3%, shaking table culture 20-40h, stops at 30-35 DEG C
It only cultivates, the mass fraction that slurries 1-2 times of weight is added is 80-90% ethanol solution, stirs 20-30min, and centrifugation takes upper layer
Liquid be concentrated into the 1/3 of original volume to get.
4. a kind of citrus post-harvest fresh-keeping method according to claim 1, it is characterised in that: in step (3), the Herba Ephedrae
Method for preparing extractive are as follows: Herba Ephedrae complete stool is cut into broken section, adds 8-10 times to measure water, decocts 1-2h, repeats to decoct 2-3 times, close
And decoction liquor, it is cooling, pH is adjusted to 9-11, the toluene measured with 2-3 times extracts at 60-70 DEG C, will with 2% oxalic acid solution
Extract liquor pH is adjusted to 7, after separating toluene layer, is concentrated under reduced pressure at 70 DEG C, is cooled to crystallization and is precipitated, and centrifugation takes precipitating dry
It is dry to get.
5. a kind of citrus post-harvest fresh-keeping method according to claim 1, it is characterised in that: in step (3), the mulberry leaf are mentioned
Object is taken the preparation method comprises the following steps: mulberry leaf is taken to crush, is added in the ethanol solution that the 3-6 times of mass fraction measured is 60-80%, ultrasonic extraction
20-30min, filtering, filtrate be concentrated under reduced pressure at 60-70 DEG C original volume 1/2 to get.
6. a kind of citrus post-harvest fresh-keeping method according to claim 1, it is characterised in that: in step (3), the pomegranate seed
Method for preparing extractive are as follows: it is pomegranate seed is dry, grind, it is put into extraction axe using supercritical carbon dioxide as solvent, in
20MPa, 1-2h is extracted at 50 DEG C, collect extract liquor to get.
7. a kind of citrus post-harvest fresh-keeping method according to claim 1, it is characterised in that: in step (3), the tamarind is mentioned
Object is taken the preparation method comprises the following steps: crushing, adding 3-5 times to measure water, be heated to boiling tamarind seed drying, holding is boiled after 1-2h, cooling
To 80-90 DEG C, stand 1-2h, be concentrated into original volume 1/3 to get.
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