Cultivation method for purple sweet potatoes and method for processing purple sweet potato powder

Abstract

The invention relates to a cultivation method for purple sweet potatoes and a method for processing purple sweet potato powder and belongs to the technical fields of sweet potato cultivation and processing. A new cultivation method is obtained by changing the concentration of thiophanate methyl water solution for soaking seeds, sweet potato seedling planting time and density, fertilizer types and consumption, and types and concentration of inhibitors. According to the cultivation method, acre yield of fresh potatoes is more than 2,200kg, the large medium sized tuber rate is higher than 90.3 percent, anthocyanin content is more than 120mg / 100g, and starch content is more than 31.1 percent; the yield for preparing the purple sweet potato powder from the purple sweet potatoes harvested by the cultivation method is higher than 41.6 percent. Methods of cooking, mashing, drying and pulverizing are adopted, sweet potatoes are sliced, and the sliced sweet potatoes are blanched, cooled, cooked, mashed, dried, pulverized and screened to form the purple sweet potato powder, the defect of poor cluster caused by improper color protection in the traditional process is overcome, and the processed product is bright in color, high in dispersibility and high in water absorption.

Description

technical field

[0001] The invention relates to a method for cultivating purple sweet potatoes and a method for processing purple sweet potato powder, belonging to the technical field of sweet potato cultivation and processing. technical background

[0002] As an ideal physiologically alkaline food, sweet potato can neutralize the acidic substances produced by rice, flour, meat, eggs, etc., and maintain the acid-base balance in the body. Cold drinks, cakes, pasta, etc. In addition to the nutritional content of the food itself, it also has a high health value, which opens up a new way for the consumption of sweet potatoes. The patented technologies for producing sweet potato powder that have been disclosed so far include: instant purple sweet potato microcapsule powder, microwave vacuum drying to prepare purple sweet potato powder, preparation of sweet potato nutrition powder, preparation of sweet potato powder, new production technology of whole cell sweet potato powder Etc...

Examples

Embodiment 1-9

[0038] Experimental plot:

[0039]The 4.5-hectare experimental field in Duanlou Village, Sunliu Town, Shanxian County, Shandong Province was divided into 9 plots, and Ji Zishu No. 1 was planted according to the methods described in Examples 1-9. The test site is a disease-free sandy loam plot that has not been planted with sweet potatoes for more than 2 years, with medium fertility, organic matter content in the 0cm-20cm plow layer is 1.44wt%-1.71wt%, hydrolyzed nitrogen 58.72mg / kg-64.08mg / kg, available phosphorus 10.88 mg / kg~13.40mg / kg, available potassium 98.38 mg / kg~121.42mg / kg.

[0040] The Ji Zishu No. 1 seed potato used in Examples 1-9 is a variety bred by the Crop Research Institute of the Shandong Academy of Agricultural Sciences, and the thiophanate-methyl used is Ricao brand 70% pure product methyl tropazine produced by Jiangsu Longdeng Chemical Co., Ltd. Bujin (mass content of active ingredient is 70%), 5% uniconazole wettable powder is produced by Jiangsu Yancheng...

Embodiment 10

[0045] Processing technology of purple sweet potato powder:

[0046] (1) Raw material selection: choose Jizishu No. 1 fresh sweet potato with smooth skin, no grooves, cracks, and no disease spots;

[0047] (2) Cleaning: Clean the sweet potatoes with water, further remove the impurities in the bud eyes and the surface of the sweet potatoes by the destoner and washing machine, and the cleaned sweet potatoes are transported to the peeling process by the elevator;

[0048] (3) Peeling: The cleaned sweet potatoes are loaded into the pressure tank of the steam peeling machine in batches, and high-pressure steam (1 MPa) is introduced. The pressure tank rotates to heat the surface of all materials evenly. After the skin is matured, the steam is instantly discharged to make the skin Burst, remove the epidermis with a brush roller, and rinse with running water at the same time;

[0049] (4) Quality inspection: Remove the potato pieces that do not meet the requirements, and manually...

Embodiment 11

[0061] Processing technology of purple sweet potato powder:

[0062] (1) Raw material selection: choose Jizishu No. 1 fresh sweet potato with smooth skin, no grooves, cracks, and no disease spots;

[0063] (2) Cleaning: Clean the sweet potatoes with water, further remove the impurities in the bud eyes and the surface of the sweet potatoes by the destoner and washing machine, and the cleaned sweet potatoes are transported to the peeling process by the elevator;

[0064] (3) Peeling: The cleaned sweet potatoes are loaded into the pressure tank of the steam peeling machine in batches, and high-pressure steam (0.8MPa) is introduced. The pressure tank rotates to heat the surface of all materials evenly. After the skin is matured, the steam is instantly discharged to make the skin Burst, remove the epidermis with a brush roller, and rinse with running water at the same time;

[0065] (4) Quality inspection: Remove the potato pieces that do not meet the requirements, and manuall...

technical field

[0001] The invention relates to a method for cultivating purple sweet potatoes and a method for processing purple sweet potato powder, belonging to the technical field of sweet potato cultivation and processing. technical background

[0002] As an ideal physiologically alkaline food, sweet potato can neutralize the acidic substances produced by rice, flour, meat, eggs, etc., and maintain the acid-base balance in the body. Cold drinks, cakes, pasta, etc. In addition to the nutritional content of the food itself, it also has a high health value, which opens up a new way for the consumption of sweet potatoes. The patented technologies for producing sweet potato powder that have been disclosed so far include: instant purple sweet potato microcapsule powder, microwave vacuum drying to prepare purple sweet potato powder, preparation of sweet potato nutrition powder, preparation of sweet potato powder, new production technology of whole cell sweet potato powder Etc...

Examples

Embodiment 1-9

[0038] Experimental plot:

[0039]The 4.5-hectare experimental field in Duanlou Village, Sunliu Town, Shanxian County, Shandong Province was divided into 9 plots, and Ji Zishu No. 1 was planted according to the methods described in Examples 1-9. The test site is a disease-free sandy loam plot that has not been planted with sweet potatoes for more than 2 years, with medium fertility, organic matter content in the 0cm-20cm plow layer is 1.44wt%-1.71wt%, hydrolyzed nitrogen 58.72mg / kg-64.08mg / kg, available phosphorus 10.88 mg / kg~13.40mg / kg, available potassium 98.38 mg / kg~121.42mg / kg.

[0040] The Ji Zishu No. 1 seed potato used in Examples 1-9 is a variety bred by the Crop Research Institute of the Shandong Academy of Agricultural Sciences, and the thiophanate-methyl used is Ricao brand 70% pure product methyl tropazine produced by Jiangsu Longdeng Chemical Co., Ltd. Bujin (mass content of active ingredient is 70%), 5% uniconazole wettable powder is produced by Jiangsu Yancheng...

Embodiment 10

[0045] Processing technology of purple sweet potato powder:

[0046] (1) Raw material selection: choose Jizishu No. 1 fresh sweet potato with smooth skin, no grooves, cracks, and no disease spots;

[0047] (2) Cleaning: Clean the sweet potatoes with water, further remove the impurities in the bud eyes and the surface of the sweet potatoes by the destoner and washing machine, and the cleaned sweet potatoes are transported to the peeling process by the elevator;

[0048] (3) Peeling: The cleaned sweet potatoes are loaded into the pressure tank of the steam peeling machine in batches, and high-pressure steam (1 MPa) is introduced. The pressure tank rotates to heat the surface of all materials evenly. After the skin is matured, the steam is instantly discharged to make the skin Burst, remove the epidermis with a brush roller, and rinse with running water at the same time;

[0049] (4) Quality inspection: Remove the potato pieces that do not meet the requirements, and manually...

Embodiment 11

[0061] Processing technology of purple sweet potato powder:

[0062] (1) Raw material selection: choose Jizishu No. 1 fresh sweet potato with smooth skin, no grooves, cracks, and no disease spots;

[0063] (2) Cleaning: Clean the sweet potatoes with water, further remove the impurities in the bud eyes and the surface of the sweet potatoes by the destoner and washing machine, and the cleaned sweet potatoes are transported to the peeling process by the elevator;

[0064] (3) Peeling: The cleaned sweet potatoes are loaded into the pressure tank of the steam peeling machine in batches, and high-pressure steam (0.8MPa) is introduced. The pressure tank rotates to heat the surface of all materials evenly. After the skin is matured, the steam is instantly discharged to make the skin Burst, remove the epidermis with a brush roller, and rinse with running water at the same time;

[0065] (4) Quality inspection: Remove the potato pieces that do not meet the requirements, and manuall...