CN104472668A - Green asparagus preservation method - Google Patents
Green asparagus preservation method Download PDFInfo
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- CN104472668A CN104472668A CN201410839992.7A CN201410839992A CN104472668A CN 104472668 A CN104472668 A CN 104472668A CN 201410839992 A CN201410839992 A CN 201410839992A CN 104472668 A CN104472668 A CN 104472668A
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Abstract
The invention provides a green asparagus preservation method. The green asparagus preservation method comprises the following steps: bundling green asparagus, placing the bundle into a freezer to be precooled, gradually reducing the temperature step by step in the precooling process, maintaining the relative humidity in the freezer to be 85-90%, after precooling, maintaining the lowest temperature in the freezer to be 0.5-1 DEG C higher than the freezing point temperature of the green asparagus and the relative humidity to be 90% above. According to the green asparagus preservation method disclosed by the invention, chemical reagents are not added, so that the fact that the product is green and pollution-free is guaranteed, and the food safety can be improved; the precooling method is used for effectively dissipating the field heat caused by the green asparagus; in the precooling process, the green asparagus is prevented from quickly losing moisture by a step-by-step cooling manner and controlling the relative humidity to be within a range of 85-90%; the green asparagus is stored according to the conditions that the temperature in the freezer is 0.5-1 DEG C higher than the freezing point temperature of the green asparagus, and the relative humidity is controlled to be 90% above, so that the respiration intensity, the metabolism and the microbial activities of the green asparagus can be inhibited, and the shapes, the colors, the hardness and the eating quality of the green asparagus can be kept well.
Description
Technical field
The present invention relates to agricultural products storage and preservation field, in particular to a kind of green asparagus method for storing and refreshing.
Background technology
Green asparagus refers to what spring had just been unearthed, and stem does not carry out earthing up, and irradiates generate chlorophyll by sunlight, and the major part of asparagus top and neck be green.Green asparagus is the high medicine-food two-purpose type vegetables of nutritive value and medical value effect, is well received by consumers.Green asparagus belongs to eats vegetables raw, and fragrant taste is mellow, fresh and tender good to eat, is rich in the amino acid such as multivitamin, fat, protein, iron, calcium, selenium and other trace elements and the asparatate that a large amount of needed by human body wants.In addition, green asparagus also has high medical value, containing a large amount of medicinal ingredients, such as multiple steroid compound, mannosan, rutin, folic acid, choline etc., these medicinal ingredients not only can improve a poor appetite, fatigue-relieving, helps digest and penetration enhancement, also has outstanding meaning to the treatment of the chronic diseases such as heart disease, ephritis, hypertension, cirrhosis, high fat of blood, hypertension and health care for the aged.Green asparagus also has stronger Pycnorus cinnabarius, is because containing a large amount of histone efficiently in green asparagus, these histones effectively can prevent the diffusion of cancer cell in human body and the growth of inhibition cancer cell on the one hand; On the other hand, containing abundant Anticancer Element Selenium-selenium in green asparagus, carcinogen effectively can be stoped oxidized and suppress free radical to be formed, also can stimulate the immunologic function of body simultaneously, improve body to the resistance of cancer cell.In addition, the folic acid contained in green asparagus can impel Normocellular growth, the diffusion of inhibition cancer cell.
The new Fresh green asparagus tender stem water content of gathering from field is high, and respiration is strong, and pole is storage tolerance not, will quality variation in several hours, and deposit 1-2 days, fibrillatable occurs, color starts to shoal, the atrophy gradually of tender stem, and dehydration is serious, and part even can be rotted.
In view of this, special proposition the present invention.
Summary of the invention
The object of the invention is to provide a kind of high-quality green asparagus method for storing and refreshing, can effectively reduce the respiratory intensity of adopting rear green asparagus, suppress its metabolism, can keep good profile, color and luster, hardness, and green asparagus can be made to preserve 30 day time.
In order to realize above-mentioned purpose of the present invention, spy by the following technical solutions:
A kind of green asparagus method for storing and refreshing,
Put into freezer after being tied up by green asparagus and carry out precooling, adjustment freezer relative humidity is 85%-90%, when green asparagus temperature is down to temperature of ice house, be distributed in corrugated case, packing terminates rear adjustment storehouse freezer lowest temperature higher than green asparagus freezing point temperature 0.5-1 DEG C and continues precooling;
After precooling terminates, maintain freezer lowest temperature higher than green asparagus freezing point temperature 0.5-1 DEG C, adjustment freezer relative humidity is more than 90% to preserve.
Green asparagus preservation method of the present invention, does not add chemical reagent, ensures Product Green, pollution-free, improve foodsafety, effectively to be left the field heat that green asparagus itself brings by forecooling method, control relative humidity during precooling in the scope of 85%-90%, avoid the quick dehydration of green asparagus; Maintain freezer minimum temperature higher than green asparagus freezing point temperature 0.5-1 DEG C, and control relative humidity more than 90%, suppress the respiratory intensity of green asparagus, suppress its metabolism, keep the profile that green asparagus is good, color and luster, hardness and edible quality, after testing, green asparagus preservation method of the present invention can make the green asparagus not easily preserved preserve 30 day time, has great economic worth.
Preferably, after being tied up by green asparagus, green asparagus is put the non-woven fabrics of one deck cleaning, then put into freezer and carry out precooling, not only absorbed steam that precooling produces but also can prevent cold wind from directly blowing green asparagus the quick dehydration of top green asparagus caused.
Preferably, in precooling process, the uncovered placement of corrugated case, ensures scattering and disappearing fast of the field heat that green asparagus self brings, and avoids causing rotting of green asparagus.
Preferably, after precooling terminates, placement that corrugated case is healed up.
Green asparagus puts into freezer when carrying out precooling, if temperature of ice house is too high, heat not easily leaves fast, and green asparagus is perishable, and pre-coo time also can increase greatly; If temperature of ice house is too low, then green asparagus surface and packaging material easily gathers more condensed water, be unfavorable for the preservation of green asparagus, preferably, before green asparagus puts into freezer, temperature of ice house be adjusted to 8-10 DEG C.
Preferably, after precooling terminates, the green asparagus tied up is wrapped by bag goods paper one by one, by green asparagus vertical display good for bag goods paper bag in corrugated case, the cleaning of carton bottom pad one deck without anti-cloth, one deck bag goods paper, without anti-cloth under, bag goods paper upper, finally lid layer bag goods paper on green asparagus.
Due to the taxis of green asparagus, if by its traverse during storage, then top scale scatters, exterior quality declines, therefore, during storage by green asparagus vertical display in carton, use the corrugated case self having gas permeability simultaneously, and in the cleaning of carton bottom pad one deck without anti-cloth, one deck bag goods paper, without anti-cloth under, bag goods paper, upper, ensures at the bottom of the case directly contacted with green asparagus stem not fragile, also ensures to allow paper absorb the part steam in packing, avoid condensation vapor in green asparagus pack environment to become the globule as far as possible, thus cause green asparagus stem to be rotted.
Preferably, the loading amount of described corrugated case is 15-20kg.
Preferably, described storage specifically comprises,
Carton is fitly placed on storage rack, between frame and frame, reserves service aisle 50-100cm, frame bottom distance ground 15-30cm.
Preferably, every layer of storage rack is put one case green asparagus, avoid a large amount of green asparagus to stack causing rotten.
Upper strata is low near refrigeration unit place temperature, though low temperature can suppress the respiratory intensity of green asparagus, suppress its metabolism, suppress microbial activities, but the too low frostbite very easily causing green asparagus of temperature, cause quality to decline equally, preferably, the carton at nearly air port place covers cotton felt or cotton-wadded quilt is incubated.
Compared with prior art, beneficial effect of the present invention is:
(1) effectively to be left the field heat that green asparagus itself brings by forecooling method, control relative humidity during precooling in the scope of 85%-90%, avoid the quick dehydration of green asparagus; Maintain temperature of ice house to preserve higher than green asparagus freezing point temperature 0.5-1 DEG C, and control relative humidity more than 90%, suppress the respiratory intensity of green asparagus, suppress its metabolism, suppress microbial activities, keep the profile that green asparagus is good, color and luster, hardness, has great economic worth.
(2) be not subject to the pollution of chemical reagent in storage, ensure the green quality of product, meet the food security idea of modern, wide market.
Detailed description of the invention
Below in conjunction with embodiment, embodiment of the present invention are described in detail, but it will be understood to those of skill in the art that the following example only for illustration of the present invention, and should not be considered as limiting the scope of the invention.Unreceipted actual conditions person in embodiment, the condition of conveniently conditioned disjunction manufacturer suggestion is carried out.Agents useful for same or the unreceipted production firm person of instrument, be and can buy by commercially available the conventional products obtained.
Embodiment 1
A kind of green asparagus method for storing and refreshing,
Put into freezer after being tied up by green asparagus and carry out precooling, adjustment freezer relative humidity is 85%-90%, when green asparagus temperature is down to temperature of ice house, be distributed in corrugated case, packing terminates rear adjustment storehouse freezer lowest temperature higher than green asparagus freezing point temperature 0.5-1 DEG C and continues precooling;
After precooling terminates, maintain freezer lowest temperature higher than green asparagus freezing point temperature 0.5-1 DEG C, adjustment freezer relative humidity is more than 90% to preserve.
The green asparagus preservation method that the present embodiment provides, do not add chemical reagent, ensure Product Green, pollution-free, improve foodsafety, effectively to be left the field heat that green asparagus itself brings by forecooling method, control relative humidity during precooling in the scope of 85%-90%, avoid the quick dehydration of green asparagus; Maintain freezer minimum temperature higher than green asparagus freezing point temperature 0.5-1 DEG C, and control relative humidity more than 90%, suppress the respiratory intensity of green asparagus, suppress its metabolism, keep the profile that green asparagus is good, color and luster, hardness and edible quality, after testing, green asparagus preservation method of the present invention can make the green asparagus not easily preserved preserve 30 day time, has great economic worth.
Embodiment 2
5 days cleaning freezers before green asparagus preparation is gathered also carry out storehouse sterilization, temperature of ice house are adjusted to 8 ~ 10 DEG C.
By the 500kg green asparagus after gathering according to " green asparagus production technology regulation " classification, tie up after classification, often tie 7 green asparagus, with packing rope to fasten at 1 ~ 5cm place below asparagus base portion 5 ~ 10cm and bamboo shoot head then put on green asparagus one deck cleaning without anti-cloth, put into freezer and carry out precooling, precooling time control refrigeration storehouse relative humidity maintains 85-90%, when green asparagus temperature is consistent with temperature of ice house, be distributed in corrugated case, packing terminates rear adjustment storehouse freezer lowest temperature higher than green asparagus freezing point temperature 0.5-1 DEG C and continues precooling, the uncovered placement of carton, precooling is terminated when green asparagus temperature is consistent with temperature of ice house, described packing specifically comprises, with bag goods paper, the green asparagus tied up is wrapped one by one, fix at bamboo shoot head and base portion with rubber band, by green asparagus vertical display good for bag goods paper bag in corrugated case, the cleaning of carton bottom pad one deck without anti-cloth, one deck bag goods paper, without anti-cloth under, bag goods paper upper, every case loading amount 20kg, finally lid layer bag goods paper on green asparagus.
After precooling terminates, placement of being healed up by corrugated case, is placed on Storage in cold bank frame, is reserved service aisle 50cm between frame and frame, and frame bottom distance ground 30cm, notices that covering cotton felt to the green asparagus carton at nearly blower fan mouth place carries out isothermal holding.
On freezer doorway, freezer middle, near blower fan mouth place puts thermometer monitoring storehouse temperature, maintenance temperature of ice house higher than green asparagus freezing point temperature 0.5-1 DEG C, laying temperature meter in the green asparagus case at freezer doorway, freezer middle, near blower fan mouth place, record temperature; In storehouse, ground watering is to there being thin ice, ensures relative humidity 90%-93%.
Randomly draw 6 casees green asparagus to detect, by extract 6 increment product respectively label be 1,2,3 ... 6, the 6 increment product that detect respectively are the quality after 30 days in storage 15 days and storage.
Table 1: the weight detecting result after storage different time
From the testing result of table 1, the method for storing and refreshing of green asparagus of the present invention can make green asparagus not easily dehydration, is less than 5.0% at the weight-loss ratio of maintenance after 15 days, is less than 7% at the weight-loss ratio of maintenance after 30 days, green asparagus can not be wilted, and still keeps good hardness.
Random selecting 50 people, judges that 6 increment product are in storage 15 days and the quality after preserving 30 days respectively,
Criterion:
Favorable comment: stem and the bulbil of green asparagus are green, have bamboo shoot fragrance, and top scale slightly scatters, the green asparagus rotted is less than 2%;
In comment: there is part purple in the stem of green asparagus and bulbil, has bamboo shoot fragrance, and the top scale degree of scattering is less than 30%, rot green asparagus at 2%-4%;
Difference is commented: the stem of green asparagus and bulbil major part are purple, and bamboo shoot fragrance is little, and the top scale degree of scattering is greater than 30%, and the green asparagus rotted accounts for more than 4%.
Testing result is as shown in table 2:
Table 2
As shown in Table 2, green asparagus detection method of the present invention, maintenance after 15 days positive rating be greater than 96%, maintenance after 30 days positive rating be greater than 92%, green asparagus still can keep good exterior quality.
Embodiment 3
3 days cleaning freezers before green asparagus preparation is gathered also carry out storehouse sterilization, temperature of ice house are adjusted to 8 ~ 10 DEG C.
By the 500kg green asparagus after gathering according to " green asparagus production technology regulation " classification, tie up after classification, often tie 10 green asparagus, with packing rope to fasten at 1 ~ 5cm place below asparagus base portion 5 ~ 10cm and bamboo shoot head then put on green asparagus one deck cleaning without anti-cloth, put into freezer and carry out precooling, precooling time control refrigeration storehouse relative humidity maintains 85-90%, when green asparagus temperature is consistent with temperature of ice house, be distributed in corrugated case, packing terminates rear adjustment storehouse freezer lowest temperature higher than green asparagus freezing point temperature 0.5-1 DEG C and continues precooling, the uncovered placement of carton, precooling is terminated when green asparagus temperature is consistent with temperature of ice house, described packing specifically comprises, with bag goods paper, the green asparagus tied up is wrapped one by one, fix at bamboo shoot head and base portion with rubber band, by green asparagus vertical display good for bag goods paper bag in corrugated case, the cleaning of carton bottom pad one deck without anti-cloth, one deck bag goods paper, without anti-cloth under, bag goods paper upper, every case loading amount 15kg, finally lid layer bag goods paper on green asparagus.
After precooling terminates, placement of being healed up by corrugated case, is placed on Storage in cold bank frame, is reserved service aisle 100cm between frame and frame, and frame bottom distance ground 30cm, notices that covering cotton felt to the green asparagus carton at nearly blower fan mouth place carries out isothermal holding.
On freezer doorway, freezer middle, near blower fan mouth place puts thermometer monitoring storehouse temperature, maintenance temperature of ice house higher than green asparagus freezing point temperature 0.5-1 DEG C, laying temperature meter in the green asparagus case at freezer doorway, freezer middle, near blower fan mouth place, record temperature; In storehouse, ground watering is to there being thin ice, ensures relative humidity 93%-96%.
Randomly draw 6 casees green asparagus to detect, by extract 6 increment product respectively label be 1,2,3 ... 6, the 6 increment product that detect respectively are the quality after 30 days in storage 15 days and storage.
Table 3: the weight detecting result after storage different time
From the testing result of table 3, the method for storing and refreshing of green asparagus of the present invention can make green asparagus not easily dehydration, is less than 5% at the weight-loss ratio of maintenance after 15 days, and be less than 8% at the weight-loss ratio of maintenance after 30 days, green asparagus can not be wilted, and still keeps good hardness.
Random selecting 50 people, judges that 6 increment product are in storage 15 days and the quality after preserving 30 days respectively,
Criterion:
Favorable comment: stem and the bulbil of green asparagus are green, have bamboo shoot fragrance, and top scale slightly scatters, the green asparagus rotted is less than 2%;
In comment: there is part purple in the stem of green asparagus and bulbil, has bamboo shoot fragrance, and the top scale degree of scattering is less than 30%, rot green asparagus at 2%-4%;
Difference is commented: the stem of green asparagus and bulbil major part are purple, and bamboo shoot fragrance is little, and the top scale degree of scattering is greater than 30%, and the green asparagus rotted accounts for more than 4%.
Testing result is as shown in table 2:
Table 4
As shown in Table 4, green asparagus detection method of the present invention, maintenance after 15 days positive rating be greater than 95%, maintenance after 30 days positive rating be greater than 90%, green asparagus still can keep good exterior quality.
Embodiment 4
5 days cleaning freezers before green asparagus preparation is gathered also carry out storehouse sterilization, temperature of ice house are adjusted to 8 ~ 10 DEG C.
By the 500kg green asparagus after gathering according to " green asparagus production technology regulation " classification, tie up after classification, often tie 8 green asparagus, with packing rope to fasten at 1 ~ 5cm place below asparagus base portion 5 ~ 10cm and bamboo shoot head then put on green asparagus one deck cleaning without anti-cloth, put into freezer and carry out precooling, precooling time control refrigeration storehouse relative humidity maintains 85-90%, when green asparagus temperature is consistent with temperature of ice house, be distributed in corrugated case, packing terminates rear adjustment storehouse freezer lowest temperature higher than green asparagus freezing point temperature 0.5-1 DEG C and continues precooling, the uncovered placement of carton, precooling is terminated when green asparagus temperature is consistent with temperature of ice house, described packing specifically comprises, with bag goods paper, the green asparagus tied up is wrapped one by one, fix at bamboo shoot head and base portion with rubber band, by green asparagus vertical display good for bag goods paper bag in corrugated case, the cleaning of carton bottom pad one deck without anti-cloth, one deck bag goods paper, without anti-cloth under, bag goods paper upper, every case loading amount 18kg, finally lid layer bag goods paper on green asparagus.
After precooling terminates, placement of being healed up by corrugated case, is placed on Storage in cold bank frame, is reserved service aisle 60cm between frame and frame, and frame bottom distance ground 30cm, notices that covering cotton felt to the green asparagus carton at nearly blower fan mouth place carries out isothermal holding.
On freezer doorway, freezer middle, near blower fan mouth place puts thermometer monitoring storehouse temperature, maintenance temperature of ice house higher than green asparagus freezing point temperature 0.5-1 DEG C, laying temperature meter in the green asparagus case at freezer doorway, freezer middle, near blower fan mouth place, record temperature; In storehouse, ground watering is to there being thin ice, ensures relative humidity 95%-98%.
Randomly draw 6 casees green asparagus to detect, by extract 6 increment product respectively label be 1,2,3 ... 6, the 6 increment product that detect respectively are the quality after 30 days in storage 15 days and storage.
Table 5: the weight detecting result after storage different time
From the testing result of table 5, the method for storing and refreshing of green asparagus of the present invention can make green asparagus not easily dehydration, is less than 4% at the weight-loss ratio of maintenance after 15 days, and be less than 7% at the weight-loss ratio of maintenance after 30 days, green asparagus can not be wilted, and still keeps good hardness.
Random selecting 50 people, judges that 6 increment product are in storage 15 days and the quality after preserving 30 days respectively,
Criterion:
Favorable comment: stem and the bulbil of green asparagus are green, have bamboo shoot fragrance, and top scale slightly scatters, the green asparagus rotted is less than 2%;
In comment: there is part purple in the stem of green asparagus and bulbil, has bamboo shoot fragrance, and the top scale degree of scattering is less than 30%, rot green asparagus at 2%-4%;
Difference is commented: the stem of green asparagus and bulbil major part are purple, and bamboo shoot fragrance is little, and the top scale degree of scattering is greater than 30%, and the green asparagus rotted accounts for more than 4%.
Testing result is as shown in table 2:
Table 6
As shown in Table 6, green asparagus detection method of the present invention, maintenance after 15 days positive rating be greater than 98%, maintenance after 30 days positive rating be greater than 94%, green asparagus still can keep good exterior quality.
Although illustrate and describe the present invention with specific embodiment, however it will be appreciated that can to make when not deviating from the spirit and scope of the present invention many other change and amendment.Therefore, this means to comprise all such changes and modifications belonged in the scope of the invention in the following claims.
Claims (10)
1. a green asparagus method for storing and refreshing, is characterized in that,
Put into freezer after being tied up by green asparagus and carry out precooling, adjustment freezer relative humidity is 85%-90%, when green asparagus temperature is down to temperature of ice house, be distributed in corrugated case, packing terminates rear adjustment storehouse freezer lowest temperature higher than green asparagus freezing point temperature 0.5-1 DEG C and continues precooling;
After precooling terminates, maintain freezer lowest temperature higher than green asparagus freezing point temperature 0.5-1 DEG C, adjustment freezer relative humidity is more than 90% to preserve.
2. the method for storing and refreshing of a kind of green asparagus according to claim 1, is characterized in that,
After being tied up by green asparagus, green asparagus is put the non-woven fabrics of one deck cleaning, then put into freezer and carry out precooling.
3. the method for storing and refreshing of a kind of green asparagus according to claim 1, is characterized in that,
In precooling process, the uncovered placement of corrugated case.
4. the method for storing and refreshing of a kind of green asparagus according to claim 1, is characterized in that,
After precooling terminates, placement that corrugated case is healed up.
5. the method for storing and refreshing of a kind of green asparagus according to claim 1, is characterized in that,
Temperature of ice house is adjusted to 8-10 DEG C before putting into freezer precooling by green asparagus.
6. the method for storing and refreshing of a kind of green asparagus according to claim 1, it is characterized in that, described being distributed in corrugated case specifically comprises: wrapped one by one by the green asparagus tied up with bag goods paper, by green asparagus vertical display good for bag goods paper bag in corrugated case, the cleaning of carton bottom pad one deck without anti-cloth, one deck bag goods paper, without anti-cloth under, bag goods paper upper, finally lid layer bag goods paper on green asparagus.
7. the method for storing and refreshing of a kind of green asparagus according to claim 6, is characterized in that,
The loading amount of described corrugated case is 15-20kg.
8. the method for storing and refreshing of a kind of green asparagus according to claim 6, is characterized in that, described storage specifically comprises,
Carton is fitly placed on storage rack, between frame and frame, reserves service aisle 50-100cm, frame bottom distance ground 15-30cm.
9. the method for storing and refreshing of a kind of green asparagus according to claim 8, is characterized in that,
Every layer of storage rack is put one case green asparagus, avoid stacking.
10. the method for storing and refreshing of a kind of green asparagus according to claim 6, is characterized in that,
The carton at nearly air port place covers cotton felt or cotton-wadded quilt is incubated.
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| CN111480533A (en) * | 2019-01-27 | 2020-08-04 | 徐州山崎农产品技术研发有限公司 | Method for preparing export quick-frozen green asparagus |
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Application publication date: 20150401 |
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