阅读说明：本技术 一种红薯保鲜防腐的存储地窑以及存储方法 (Sweet potato fresh-keeping and corrosion-preventing storage ground kiln and storage method ) 是由 曹月婷 董小雨 于 2021-09-15 设计创作，主要内容包括：本发明提供一种红薯保鲜防腐的存储地窑以及存储方法,其包括地下窑体、上层窑体和进出窑体；其中,地下窑体位于地面以下,上层窑体位于地下窑体的上侧,进出窑体具有第一道门和第二道门,进出窑体具有斜置底部坡面,进出窑体的内侧通过第二道门与地下窑体连接,进出窑体的外侧设置第一道门；上层窑体上布置有天窗和侧窗。人员或者车辆从进出窑体的第一道门和第二道门进行进出,并且在地下窑体的分隔的多个区域内存放红薯并且进行搬运。进一步地,通过天窗和侧窗的开闭和大小调节而方便室内外的温湿度的交流,以把窑内温湿度控制在合理的范围内。本发明提供的结构,其进出方便、节能降耗、储存量大,保温性能好,易于控制。(The invention provides a sweet potato fresh-keeping and corrosion-resistant storage ground kiln and a storage method, wherein the storage ground kiln comprises an underground kiln body, an upper-layer kiln body and an in-out kiln body; the underground kiln body is positioned below the ground, the upper-layer kiln body is positioned on the upper side of the underground kiln body, the in-out kiln body is provided with a first gate and a second gate, the in-out kiln body is provided with an inclined bottom slope, the inner side of the in-out kiln body is connected with the underground kiln body through the second gate, and the outer side of the in-out kiln body is provided with the first gate; and a skylight and a side window are arranged on the upper-layer kiln body. And the personnel or the vehicles enter and exit from the first door and the second door of the kiln body, and the sweet potatoes are stored and carried in a plurality of separated areas of the underground kiln body. Furthermore, the indoor and outdoor temperature and humidity communication is facilitated through the opening and closing and size adjustment of the skylight and the side windows, so that the temperature and humidity in the kiln are controlled within a reasonable range. The structure provided by the invention has the advantages of convenience in entering and exiting, energy conservation, consumption reduction, large storage capacity, good heat insulation performance and easiness in control.)

1. A sweet potato storage ground kiln for fresh preservation and corrosion prevention is characterized by comprising an underground kiln body, an upper layer kiln body and an in-out kiln body; the underground kiln body is positioned below the ground, the upper-layer kiln body is positioned on the upper side of the underground kiln body, the in-out kiln body is provided with a first gate and a second gate, the in-out kiln body is provided with an inclined bottom slope, the inner side of the in-out kiln body is connected with the underground kiln body through the second gate, and the first gate is arranged on the outer side of the in-out kiln body; and a skylight and a side window are arranged on the upper-layer kiln body.

2. The sweet potato fresh-keeping and corrosion-preventing storage ground kiln as claimed in claim 1, wherein the first door is located at a relatively high position of the inclined bottom slope surface, the second door is located at a relatively low position of the inclined bottom slope surface, and the first door is flush with the ground; the inclined angle of the inclined bottom slope surface is 10 degrees to 20 degrees.

3. The sweet potato preservation storage ground kiln as claimed in claim 1, wherein the height of the underground kiln body below the ground is 4 meters, and the height of the underground kiln body above the ground is 1 meter;

the section of the underground kiln body is of a trapezoidal structure which is gradually narrowed from top to bottom; the width of the bottom of the underground kiln body is 12 meters, and the width of the top of the underground kiln body is 14 meters; the section of the upper kiln body is triangular; the underground kiln body and the upper-layer kiln body are 80-200 m in length, and 200 kilograms of sweet potatoes can be stored in a storage space of each 100 m unit.

4. The sweet potato preservation and preservation storage ground kiln as claimed in claim 1, wherein ventilation devices are arranged in the skylight and the side windows and used for adjusting the temperature and humidity in the kiln.

5. The sweet potato preservation and preservation storage ground kiln as claimed in claim 1, wherein a plurality of kiln regions are formed by dividing in the underground kiln body, two sides of the kiln regions are formed by hanging and separating straw mats, the length of the kiln regions is 10 m, and the kiln regions are arranged in a non-shaped structure in the underground kiln body.

6. The storage method of the sweet potato preservation storage ground kiln according to claim 1, characterized by comprising the following steps:

harvesting and storage period: the sweet potatoes are generally harvested in the middle and last ten days of 9 months, and are stored until 3 months and the seedlings are grown, wherein 6 months are total; fresh plant for seed reservation and for commercial plant storage; when the ground temperature is reduced to below 15 ℃, harvesting is started, and when the ground temperature is reduced to 12 ℃, harvesting is finished; the yield and the quality are influenced too early in the harvesting period, and the cold injury is easily caused too late in the harvesting period; selecting a rainy day when harvesting, lightly planing, and putting into a kiln on the same day; before entering a kiln, 500 times of carbendazim is needed to be sprayed and sterilized on the kiln wall, the ground without sweet potatoes and an aisle, and the humidity of the carbendazim is needed to be sprayed to be more than 90 percent so as to ensure that sweet potato blocks can comfortably enter the kiln;

from the middle ten days of 9 months to the last ten days of 10 months, the outdoor temperature is between 15 ℃ and 35 ℃, and the entering into the kiln is completed before the frost fall of 10 months, 10 days to 10 months, 24 days; when the germination medium is stored, the temperature in the kiln is about 18-20 ℃, when the humidity is 85-87%, if the external temperature is low but not lower than 8 ℃ when the germination medium is put into the kiln, if the external temperature is lower than 7 ℃, the germination rate and the taste are affected by freezing injury, and at the moment, the temperature in the kiln is higher than 10 ℃; the temperature is reduced to below 0 ℃ outside the entering time of the Yuan Dan, and the kiln storage temperature is controlled to be between 10 and 13 ℃ until the spring time;

after the sweet potatoes are stored for 10 to 15 days, the sweet potatoes are heated, namely, the heating period is started, so that the temperature in the kiln can be raised to 25 to 27 ℃ for a moment, all side windows and skylight windows are opened in time at the moment, the temperature is reduced, the temperature is kept between 18 and 20 ℃, and the humidity is kept between 87 and 85 percent; when the sweet potatoes are put into the kiln, the sweet potatoes in each empty kiln hole cannot be filled once, the volume of the sweet potatoes in each empty kiln hole is basically not more than 1/3 in each filling, the sweet potatoes are filled 3 to 4 times, the sweating condition needs to be observed in the middle of the filling, the sweet potatoes are filled once in about 5 to 10 days, the temperature is quickly raised in the sweating period, the air circulation needs to be noticed, and the temperature is reduced;

gradually cooling the outdoor temperature to 15-18 ℃ from the middle ten days of 10 months to the last ten days of 11 months, basically closing the convection side window and the skylight when the humidity is 80-82%, and entering a dormant period to ensure the temperature in the kiln;

when the month comes 12, the outside temperature is reduced to below 7 ℃ to 8 ℃, all the skylight, the side windows and the goods inlet and outlet doors are closed, and felt cloth and straw mat should be covered for heat preservation; at the moment, the temperature in the kiln is kept between 11 ℃ and 13 ℃, sweet potatoes germinate if the temperature exceeds 15 ℃, the humidity is 80 percent, if the humidity is lower than 75 percent, the humidity is increased, the sweet potatoes enter a dormancy stage until 12 months end, the humidity is 80 percent, the temperature is kept between 10 ℃ and 12 ℃, the sweet potatoes enter a deep sleep stage until 5 months later, and the humidity is 9 to 10 ℃;

yuanyue 5-20 days at 9-10 deg.C and 80% humidity; yuanyue 20 days to Yuanyue 10 days, at 10 deg.C to 11.5 deg.C and at 78% to 80% humidity; 2 months, 10 days to 25 days, the temperature is 11 ℃ to 13 ℃, and the humidity is 80 percent; 25 days in 2 months to 10 days in 3 months, the temperature is 13-14 ℃, and the humidity is 80%; 3 months and 10 days to 3 months and 25 days, the temperature is 14 ℃ to 16 ℃, and the humidity is 80 percent to 82 percent; adjusting the temperature by using felt and straw mat;

after spring, the ground temperature gradually rises, the sweet potatoes in the kiln are gradually moved out for sale, the external temperature reaches about 20 ℃ at the bottom of 3 months, the temperature in the kiln must be controlled to be 14-16 ℃, the temperature outside the middle ten days of the month is increased to 20-25 ℃, the temperature in the kiln is still controlled to be 14-16 ℃, and the sweet potatoes are completely moved out until 5 months.

7. The storage method of the sweet potato preservation storage ground kiln according to claim 6, characterized by comprising the following steps: during the storage of the sweet potatoes, the indoor illumination is generally 50 to 450 lux, and the illumination intensity is adjusted through a side window and a skylight.

8. The method of claim 6, wherein the method is applied to Pushu 32, Niyan shu 25, Shanshu 19, Jishu 25, Xushu 18, Qin shu 18, Longshu 9 and Jishu 26.

Technical Field

The invention relates to a preservation method of agricultural products, in particular to a storage ground kiln for preservation and corrosion prevention of sweet potatoes and a storage method, and particularly relates to a preservation and corrosion prevention method technology of sweet potatoes during seedling raising from harvest to harvest.

Background

Sweet potatoes (sweet potatoes) are known by their own name sweet potatoes, also known as sweet potatoes, sweet potatoes (northern regions), sweet potatoes (some regional dialects), sweet potatoes and the like.

Sweet potato contains some basic substances, such as protein, pectin, starch, amino acid, vitamin/cellulose and various minerals, and the substance has the name of "longevity food". The sugar content is 15-20%. And it also has anticancer, emphysema preventing, diabetes preventing, and heart protecting effects. In the Ming Dynasty, Li Shizhen recorded in book of compendium of materia Medica that sweet potato tonifies deficiency, invigorates spleen and stimulates appetite, and strengthens kidney yin, so it is also considered as one of the traditional Chinese medicines.

In northern areas such as the central and south areas of Hebei, a traditional sweet potato storage method is available in rural areas, namely, sweet potatoes are stored in a vertical round shaft kiln, however, because the shaft kiln is of a structure which is vertical up and down, the shaft kiln is very inconvenient to enter and exit, poor in ventilation, and difficult to control temperature, humidity and ventilation. The combination of the factors also causes the problems that the sweet potatoes are easy to rot, have poor preservation quality and have low economic benefit in the storage process.

Disclosure of Invention

In order to solve the problems in the prior art, the invention provides a cave structure and a storage method which can better keep the sweet potatoes fresh and are convenient to enter and exit.

The invention provides a sweet potato preservation and corrosion prevention storage ground kiln, which comprises an underground kiln body, an upper layer kiln body and an in-out kiln body; the underground kiln body is positioned below the ground, the upper-layer kiln body is positioned on the upper side of the underground kiln body, the in-out kiln body is provided with a first gate and a second gate, the in-out kiln body is provided with an inclined bottom slope, the inner side of the in-out kiln body is connected with the underground kiln body through the second gate, and the first gate is arranged on the outer side of the in-out kiln body; and a skylight and a side window are arranged on the upper-layer kiln body.

Preferably, the first gate is located at a relatively high position on the inclined bottom slope surface, the second gate is located at a relatively low position on the inclined bottom slope surface, and the first gate is flush with the ground; the inclined angle of the inclined bottom slope surface is 10 degrees to 20 degrees.

In a preferred scheme, the height of the underground kiln body 10 below the ground is 4 meters, and the height of the underground kiln body 10 above the ground is 1 meter; the section of the underground kiln body is of a trapezoidal structure which is gradually narrowed from top to bottom; the width of the bottom of the underground kiln body is 12 meters, and the width of the top of the underground kiln body is 14 meters; the section of the upper kiln body is triangular; the underground kiln body and the upper-layer kiln body are 80-200 m in length, and 200 kilograms of sweet potatoes can be stored in a storage space of each 100 m unit.

Preferably, the skylight and the side window are internally provided with ventilation devices which are used for adjusting the temperature and the humidity in the kiln.

One preferable scheme is that a plurality of kiln regions are formed in the underground kiln body in a dividing mode, two sides of each kiln region are formed by hanging and separating straw mats, the length of each kiln region is 10 m, and the plurality of kiln regions are arranged in the underground kiln body in a non-shaped structure.

The invention provides a storage method of a sweet potato fresh-keeping and corrosion-preventing storage ground kiln, which comprises the following steps:

harvesting and storage period: the sweet potatoes are generally harvested in the middle and last ten days of 9 months, and are stored until 3 months and the seedlings are grown, wherein 6 months are total; fresh plant for seed reservation and for commercial plant storage; when the ground temperature is reduced to below 15 ℃, harvesting is started, and when the ground temperature is reduced to 12 ℃, harvesting is finished; the yield and the quality are influenced too early in the harvesting period, and the cold injury is easily caused too late in the harvesting period; selecting a rainy day when harvesting, lightly planing, and putting into a kiln on the same day; before entering a kiln, 500 times of carbendazim is needed to be sprayed and sterilized on the kiln wall, the ground without sweet potatoes and an aisle, and the humidity of the carbendazim is needed to be sprayed to be more than 90 percent so as to ensure that sweet potato blocks can comfortably enter the kiln;

from the middle ten days of 9 months to the last ten days of 10 months, the outdoor temperature is between 15 ℃ and 35 ℃, and the entering into the kiln is completed before the frost fall of 10 months, 10 days to 10 months, 24 days; when the germination medium is stored, the temperature in the kiln is about 18-20 ℃, when the humidity is 85-87%, if the external temperature is low but not lower than 8 ℃ when the germination medium is put into the kiln, if the external temperature is lower than 7 ℃, the germination rate and the taste are affected by freezing injury, and at the moment, the temperature in the kiln is higher than 10 ℃; the temperature is reduced to below 0 ℃ outside the entering time of the Yuan Dan, and the kiln storage temperature is controlled to be between 10 and 13 ℃ until the spring time;

after the sweet potatoes are stored for 10 to 15 days, the sweet potatoes are heated, namely, the heating period is started, so that the temperature in the kiln can be raised to 25 to 27 ℃ for a moment, all side windows and skylight windows are opened in time at the moment, the temperature is reduced, the temperature is kept between 18 and 20 ℃, and the humidity is kept between 87 and 85 percent; when the sweet potatoes are put into the kiln, the sweet potatoes in each empty kiln hole cannot be filled once, the volume of the sweet potatoes in each empty kiln hole is basically not more than 1/3 in each filling, the sweet potatoes are filled 3 to 4 times, the sweating condition needs to be observed in the middle of the filling, the sweet potatoes are filled once in about 5 to 10 days, the temperature is quickly raised in the sweating period, the air circulation needs to be noticed, and the temperature is reduced;

gradually cooling the outdoor temperature to 15-18 ℃ from the middle ten days of 10 months to the last ten days of 11 months, basically closing the convection side window and the skylight when the humidity is 80-82%, and entering a dormant period to ensure the temperature in the kiln;

when the month comes 12, the outside temperature is reduced to below 7 ℃ to 8 ℃, all the skylight, the side windows and the goods inlet and outlet doors are closed, and felt cloth and straw mat should be covered for heat preservation; at the moment, the temperature in the kiln is kept between 11 ℃ and 13 ℃, sweet potatoes germinate if the temperature exceeds 15 ℃, the humidity is 80 percent, if the humidity is lower than 75 percent, the humidity is increased, the sweet potatoes enter a dormancy stage until 12 months end, the humidity is 80 percent, the temperature is kept between 10 ℃ and 12 ℃, the sweet potatoes enter a deep sleep stage until 5 months later, and the humidity is 9 to 10 ℃;

yuanyue 5-20 days at 9-10 deg.C and 80% humidity; yuanyue 20 days to Yuanyue 10 days, at 10 deg.C to 11.5 deg.C and at 78% to 80% humidity; 2 months, 10 days to 25 days, the temperature is 11 ℃ to 13 ℃, and the humidity is 80 percent; 25 days in 2 months to 10 days in 3 months, the temperature is 13-14 ℃, and the humidity is 80%; 3 months and 10 days to 3 months and 25 days, the temperature is 14 ℃ to 16 ℃, and the humidity is 80 percent to 82 percent; adjusting the temperature by using felt and straw mat;

after spring, the ground temperature gradually rises, the sweet potatoes in the kiln are gradually moved out for sale, the external temperature reaches about 20 ℃ at the bottom of 3 months, the temperature in the kiln must be controlled to be 14-16 ℃, the temperature outside the middle ten days of the month is increased to 20-25 ℃, the temperature in the kiln is still controlled to be 14-16 ℃, and the sweet potatoes are completely moved out until 5 months.

The fresh-keeping of the sweet potatoes is carried out by adopting the structure and the steps, so that the shelf life of the sweet potatoes is obviously prolonged, the proportion of the sweet potatoes with quality change is below 5 percent from 9 months in the first year to 5 months in the second year, and the sweet potatoes with quality change have bacterial plaque and mildew which are more than 0.2 cm and visible to naked eyes on the skins of the sweet potatoes.

One preferred embodiment comprises the following steps: during the storage of the sweet potatoes, the indoor illumination is generally 50 to 450 lux, and the illumination intensity is adjusted through a side window and a skylight.

In a preferred embodiment, the storage method is suitable for Pushu 32, Nicotiana tabacum 25, Shandong 19, Jishu 25, Xushu 18, Qin potato 18, Longshu 9 and Jishu 26.

The invention has the beneficial effects that: and the personnel or the vehicles enter and exit from the first door and the second door of the kiln body, and the sweet potatoes are stored and carried in a plurality of separated areas of the underground kiln body. Furthermore, the indoor and outdoor temperature and humidity communication is facilitated through the opening and closing and size adjustment of the skylight and the side windows, so that the temperature and humidity in the kiln are controlled within a reasonable range. The structure provided by the invention has the advantages of convenience in entering and exiting, energy conservation, consumption reduction, large storage capacity, good heat insulation performance and easiness in control.

Drawings

FIG. 1 is a schematic view of a sweet potato preservation and preservation storage ground kiln of the present invention;

FIG. 2 is another angle schematic diagram of the sweet potato preservation and preservation storage ground kiln of the invention;

FIG. 3 is a temperature control change curve diagram adopted by the storage method of the sweet potato preservation and preservation storage ground kiln in different month times;

FIG. 4 is a graph showing the variation of humidity control adopted by the storage method of the sweet potato preservation and preservation storage ground kiln in different months;

FIG. 5 is a schematic view of the storage suspension and related components arranged in the storage area inside the sweet potato preservation and corrosion prevention storage ground kiln of the invention;

FIG. 6 is a schematic structural view of the storage suspension and transfer structure of the present invention;

FIG. 7 is a schematic cross-sectional structural view of the hanger bar, fifth driving wheel, driving wheel and timing belt of the present invention;

fig. 8 is an enlarged schematic view of region a in fig. 7.

Detailed Description

The first embodiment:

the storage ground kiln for sweet potato preservation and corrosion prevention provided by the embodiment comprises an underground kiln body 10, an upper layer kiln body 11 and an in-out kiln body 13; the underground kiln body 10 is positioned below the ground 14, the upper-layer kiln body 11 is positioned on the upper side of the underground kiln body 10, the in-out kiln body 13 is provided with a first door 15 and a second door 16, the in-out kiln body 13 is provided with an inclined bottom slope surface 17, the inner side of the in-out kiln body 13 is connected with the underground kiln body 10 through the second door 16, and the outer side of the in-out kiln body 13 is provided with the first door 15; the upper kiln body 11 is provided with a skylight 18 and a side window 19. The first door is used for preventing wind, the second door is used for resisting cold, and the cart with the hanging bucket can move along the inclined bottom slope 17 of the kiln inlet and outlet body 13, so that the operation is convenient.

In a specific use process, people or vehicles enter and exit from the first door 15 and the second door 16 of the kiln body, and sweet potatoes are stored and carried in a plurality of separated areas of the underground kiln body 10. Furthermore, the communication of the indoor and outdoor temperature and humidity is facilitated through the opening and closing and size adjustment of the skylight 18 and the side windows 19, so that the temperature and humidity in the kiln can be controlled within a reasonable range. The structure provided by the invention has the advantages of convenience in entering and exiting, energy conservation, consumption reduction, large storage capacity, good heat insulation performance and easiness in control.

Preferably, the first gate 15 is located at a relatively high position of the inclined bottom slope 17, the second gate 16 is located at a relatively low position of the inclined bottom slope 17, and the first gate 15 is flush with the ground 14; the inclined angle of the inclined bottom slope 17 is 10 to 20 degrees.

The height of the underground kiln body 10 below the ground is 4 meters, and the height of the underground kiln body 10 above the ground is 1 meter; the section of the underground kiln body 10 is of a trapezoidal structure which is gradually narrowed from top to bottom; the width of the bottom of the underground kiln body 10 is 12 meters, and the width of the top of the underground kiln body 10 is 14 meters; the section of the upper kiln body 11 is triangular; the length of the underground kiln body 10 and the upper-layer kiln body 11 is 80-200 meters, and 200 kilograms of sweet potatoes can be stored in a storage space of each 100-meter unit.

The skylight 18 and the side windows 19 have ventilation devices therein for adjusting the temperature and humidity inside the kiln.

A plurality of kiln regions are formed in the underground kiln body 10 in a divided mode, two sides of each kiln region are formed by hanging and separating straw mats, the length of each kiln region is 10 meters, and the plurality of kiln regions are arranged in the underground kiln body in a non-shaped structure.

The storage method of the invention is based on the experiment carried out in the Shijiazhuang of Hebei province and the surrounding areas, and the storage method can be also adopted in the areas with similar climate to the local areas.

The invention provides a storage method of a sweet potato fresh-keeping and corrosion-preventing storage ground kiln, which comprises the following steps:

harvesting and storage period: the sweet potatoes are generally harvested in the middle and last ten days of 9 months, and are stored until 3 months and the seedlings are grown, wherein 6 months are total; the fresh summer for reserving seeds and the fresh summer stored in the commercial summer starts to harvest when the ground temperature is reduced to below 15 ℃, and finishes harvesting when the ground temperature is reduced to 12 ℃; the yield and the quality are influenced too early in the harvesting period, and the cold injury is easily caused too late in the harvesting period; selecting a rainy day when harvesting, lightly planing, and putting into a kiln on the same day; before entering a kiln, 500 times (diluting with water) of carbendazim is needed to be sprayed and sterilized on the kiln wall, the ground where the sweet potatoes are not placed and an aisle, and the humidity of the carbendazim is needed to be sprayed to the area above 90% so as to ensure that the sweet potato blocks can comfortably live in;

from the middle ten days of 9 months to the last ten days of 10 months, the outdoor temperature is between 15 ℃ and 35 ℃, and the entering into the kiln is completed before the frost fall of 10 months, 10 days to 10 months, 24 days; when the germination medium is stored, the temperature in the kiln is about 18-20 ℃, when the humidity is 85-87%, if the external temperature is low but not lower than 8 ℃ when the germination medium is put into the kiln, if the external temperature is lower than 7 ℃, the germination rate and the taste are affected by freezing injury, and at the moment, the temperature in the kiln is higher than 10 ℃; the temperature is reduced to below 0 ℃ outside the entering time of the Yuan Dan, and the kiln storage temperature is controlled to be between 10 and 13 ℃ until the spring time;

after the sweet potatoes are stored for 10 to 15 days, the sweet potatoes are heated, namely, the heating period is started, so that the temperature in the kiln can be raised to 25 to 27 ℃ for a moment, all side windows and skylight windows are opened in time at the moment, the temperature is reduced, the temperature is kept between 18 and 20 ℃, and the humidity is kept between 87 and 85 percent; when the sweet potatoes are put into the kiln, the sweet potatoes in each empty kiln hole cannot be filled once, the volume of the sweet potatoes in each empty kiln hole is basically not more than 1/3 in each filling, the sweet potatoes are filled 3 to 4 times, the sweating condition needs to be observed in the middle of the filling, the sweet potatoes are filled once in about 5 to 10 days, the temperature is quickly raised in the sweating period, the air circulation needs to be noticed, and the temperature is reduced;

gradually cooling the outdoor temperature to 15-18 ℃ from the middle ten days of 10 months to the last ten days of 11 months, basically closing the convection side window and the skylight when the humidity is 80-82%, and entering a dormant period to ensure the temperature in the kiln;

when the month comes 12, the outside temperature is reduced to below 7 ℃ to 8 ℃, all the skylight, the side windows and the goods inlet and outlet doors are closed, and felt cloth and straw mat should be covered for heat preservation; at the moment, the temperature in the kiln is kept between 11 ℃ and 13 ℃, sweet potatoes germinate if the temperature exceeds 15 ℃, the humidity is 80 percent, if the humidity is lower than 75 percent, the humidity is increased, the sweet potatoes enter a dormancy stage until 12 months end, the humidity is 80 percent, the temperature is kept between 10 ℃ and 12 ℃, the sweet potatoes enter a deep sleep stage until 5 months later, and the humidity is 9 to 10 ℃;

yuanyue 5-20 days at 9-10 deg.C and 80% humidity; yuanyue 20 days to Yuanyue 10 days, at 10 deg.C to 11.5 deg.C and at 78% to 80% humidity; 2 months, 10 days to 25 days, the temperature is 11 ℃ to 13 ℃, and the humidity is 80 percent; 25 days in 2 months to 10 days in 3 months, the temperature is 13-14 ℃, and the humidity is 80%; 3 months and 10 days to 3 months and 25 days, the temperature is 14 ℃ to 16 ℃, and the humidity is 80 percent to 82 percent; the temperature is regulated by the covering area of the felt and the straw mat;

after spring, the ground temperature gradually rises, the sweet potatoes in the kiln are gradually moved out for sale, the external temperature reaches about 20 ℃ at the bottom of 3 months, the temperature in the kiln must be controlled to be 14-16 ℃, the temperature outside the middle ten days of the month is increased to 20-25 ℃, the temperature in the kiln is still controlled to be 14-16 ℃, and the sweet potatoes are completely moved out until 5 months.

The optimal temperature and humidity values at different month times are given in fig. 3 and 4, respectively, the shelf life of the sweet potatoes properly controlled by the optimal parameters is prolonged, and the proportion of the sweet potatoes undergoing mildew is significantly reduced.

During the storage of the sweet potatoes, the indoor illumination is generally 50 to 450 lux, and the illumination intensity is adjusted through a side window and a skylight.

The storage method is suitable for Pushu 32, Niyanshu 25, Shanshu 19, Jishu 25, Xushu 18, Qin Shu 18, Longshu 9, and Jishu 26.

In other preferred embodiments, the conveying structure 40 and the object placing suspension 50 are further included, the conveying structure 40 has a conveying belt 41, the object placing suspension 50 is located on the upper side of the conveying structure 40, the object placing suspension 50 has a multi-layer platform structure 51, each layer of platform structure 51 has a plurality of sets of suspension rods 52 adjacently arranged, two suspension rods 52 form a set of suspension rod units 520 for placing and supporting sweet potatoes, the suspension rod units 520 have a first rod 521 and a second rod 522, a first driving wheel 501 and a second driving wheel 502 are sleeved on the extension part of the first rod 251, a third driving wheel 503 and a fourth driving wheel 504 are sleeved on the extension part of the second rod 522, the first driving wheel 501 is connected with the next set of first driving wheels 501 through a synchronous belt 500, the next set of second driving wheels 502 is connected with the third set of second driving wheels 502 through the synchronous belt 500, the third driving wheel 503 is connected with the next set of third driving wheels 503 through the synchronous belt 500, the next group of fourth driving wheels 504 is connected with the third group of fourth driving wheels 502 through a synchronous belt and is sequentially connected, a first motor 505 is connected with the first driving wheel 501 through the synchronous belt, a second motor 506 is connected with the third driving wheel 503 through the synchronous belt, a plurality of groups of gaps 53 are arranged on the suspension rod 52 along the axial direction, one end of the suspension rod 52 is connected with a connecting rod 54, the upstream side of the connecting rod 54 is connected with a first three-way valve 55, the first end of the first three-way valve 55 is connected with a ventilation pipeline 57 through a first pipeline 56, the ventilation pipeline 57 is connected with an upstream ventilation device, the second end of the first three-way valve 55 is connected with a second three-way valve 61 through a second pipe section 59, the second three-way valve 61 is also respectively connected with a sterilizing liquid tank 62 and a water tank 63, and the sterilizing liquid tank 62 is connected with a first output pipe 64 having a first flow meter 65, and the water tank 63 has a second flow meter 67 through a second output pipe 66. Preferably, there are rotating vanes at the clearance locations. Preferably, a fifth driving wheel 508 is sleeved on the suspension rods 52, the fifth driving wheel 508 is connected with the driving wheel 507 through a synchronous belt 500, and the adjacent two suspension rods 52 are connected and driven through the synchronous belt 500 and the driving wheel. Further, the suspension rod 52 has an inner tube 523 and an outer tube 524, the inner tube 523 is rotatably disposed inside the outer tube 524, the inner tube 523 has an inner gap 5230 along the axial direction, and the inner gap 5230 includes an absolute gap 5231 and a leakage gap 5232, the absolute gap 5231 is a directly formed perforation 5233, the leakage gap 5232 is a gap filled with cotton fabric or sponge, and the absolute gap 5231 and the leakage gap 5232 are selectively opposite to the gap of the outer tube 524 when the inner tube 523 rotates relative to the outer tube 524.

In a specific use process, sweet potatoes are placed on the multi-layer platform 51 structure, namely on two adjacent suspension rods 52. When ventilation is needed, the ventilation equipment is started to work, air flow carries air and water vapor to enter the suspension rods 52 and is discharged from the gaps, and the temperature and the humidity of the external environment are changed for the sweet potatoes in a fastest and most uniform mode. In addition, before the sweet potatoes are moved in, the ground needs to be disinfected and sterilized, and at the moment, the liquid in the sterilizing liquid tank 62 and the liquid in the water tank 63 are selectively led into the mixing tank through the control action of the first three-way valve 55 and the second three-way valve 61, and then enter the hanger rod 52 after being mixed. In addition, for the spraying process of the liquid, when moving to the rotary blade, the air flow is supplied at the same time, the liquid is sprayed uniformly to the ground by means of the air flow, or the air flow and the liquid alternately flow to the gap position and are discharged from the rotary blade. In addition, in some cases, the anti-corrosion liquid needs to be uniformly coated on the sweet potatoes, and the driving structure is started to rotate at this time, so that the driving wheels and the driving wheels rotate, the plurality of rotary frame rods 52 rotate, the anti-corrosion liquid (from the sterilization liquid tank 62) is continuously released through gaps in the rotating process, and the anti-corrosion liquid is uniformly coated on the sweet potatoes. In order to better realize the smearing effect, the two adjacent suspension rods form a rotation effect towards the central direction, namely an inward clamping rotation effect, so that the smearing effect on the surfaces of the sweet potatoes is better realized. In addition, in order to more uniformly coat the anti-corrosion liquid, the inner pipe 523 is rotated relative to the outer pipe 524, so that the leakage gap 5232 is arranged opposite to the gap of the outer pipe 524, and the liquid can flow slowly to be better coated on the sweet potatoes more uniformly.