Fresh-keeping method for Xuangxiang kiwi fruits through combination of lonicera confusa compound extract and chitosan coating treatment

Abstract

The invention relates to a fresh-keeping method for Xuangxiang kiwi fruits by combining a lonicera confusa compound extract with chitosan coating treatment, and belongs to the technical field of fruit fresh-keeping. The method is characterized in that Xuangxiang kiwi fruits which are 80% mature, uniform in size, free of plant diseases and insect pests, free of mechanical damage and provided with fruit stems are soaked in a lonicera confusa compound extract for 8-12 min, and then chitosan treatment liquid is used for coating treatment. The lonicerae flos compound extract is prepared by the following steps: soaking a proper amount of high-quality lonicerae flos medicinal material, a proper amount of galangal medicinal material and a proper amount of clove medicinal material in water for 25 minutes, and boiling for 25 minutes Cooling and soaking the Xuangxiang kiwi fruits; and then carrying out film coating treatment by using a chitosan treatment solution. According to the method, the storage quality of the Xuangxiang kiwi fruits can be improved, the storage period of the Xuangxiang kiwi fruits can be prolonged, the fresh-keeping period of the Xuangxiang kiwi fruits at normal temperature can reach 50-60 days through treatment and is prolonged by 20-30 days compared with the fresh-keeping period of the Xuangxiang kiwi fruits without treatment, and the rotting rate can be reduced to 15% or below; the good sensory quality of the Xuangxiang kiwi fruits is maintained; the materials used for treatment are all natural plant raw materials, and are green, healthy and harmless.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of fruit preservation, and relates to a kiwifruit preservation method using honeysuckle compound extract combined with chitosan coating treatment. BACKGROUND

[0002] Kiwifruit (Actinidia chinensis Planch.) is a plant of the Actinidia genus of the Actinidiaceae family. At present, the main cultivated varieties of kiwifruit in China are Chinese kiwifruit and delicious kiwifruit. 'Xuxiang' kiwifruit belongs to a kind of delicious kiwifruit. The fruit contains rich Vc, has attractive aroma and delicate taste, and is sweet and sour. The fruit can not only quench thirst, but also has the effects of antioxidation, cancer prevention, blood lipid and blood pressure regulation, and anti-aging. Due to the good value of food and medicine of kiwifruit, the fruit is deeply loved by people. However, the kiwifruit has a thin skin and much juice, belongs to a typical respiration climacteric berry, has relatively vigorous postharvest respiration metabolism, is easily damaged mechanically and suffers from microbial diseases, and is extremely easy to rot and breed microorganisms under natural conditions after being stored for a short time and becoming soft and mature, so that the storage quality is reduced and the sales quality of fresh kiwifruit is seriously affected. Although there are many fruit storage and preservation methods at present, these methods excessively depend on chemicals, have limited preservation effect, and have chemical residues. With the improvement of people's living standards, natural, safe and environmentally-friendly preservation technologies are increasingly concerned by people. SUMMARY

[0003] The application aims to provide a kiwifruit preservation method using honeysuckle compound extract combined with chitosan coating treatment, and solve the problems of limited preservation effect of the existing 'Xuxiang' kiwifruit and harm of chemical drugs used for preservation to human bodies.

[0004] The technical solution adopted by the application is that 80% mature 'Xuxiang' kiwifruit is washed with clean water to remove dirt on the fruit surface, then the fruit is soaked in honeysuckle compound extract for 8-12 min, then the fruit is treated with chitosan coating, and finally the fruit is dried in ventilation, packaged with a PE preservative bag, and stored in a storage room at a temperature of 20-25 DEG C and humidity under natural conditions. The honeysuckle compound extract is prepared by soaking high-quality honeysuckle, high-quality galangal and clove in water for 25 min, and boiling for 25 min. After cooling, the 'Xuxiang' kiwifruit is soaked. Then the fruit is treated with 2% chitosan coating, dried in ventilation, and packaged.

[0005] The application has the beneficial effect that the 'Xuxiang' kiwifruit treated with honeysuckle compound extract combined with chitosan coating has good preservation effect and is harmless to human bodies. DETAILED DESCRIPTION

[0006] Traditional Chinese medicine contains flavonoids, polyphenols and other antioxidants, honeysuckle extract has antioxidant, antibacterial and anti-inflammatory and other biological activities. Galangal and clove have antibacterial effect, and are both edible and medicinal materials.

[0007] The compound of honeysuckle, galangal and clove combined with chitosan coating to preserve fruits, not only efficient, but also safe and environmentally friendly, it is a very promising biological preservation technology.

[0008] The 8 mature, uniform size, no disease and insect pests, no mechanical damage, with fruit stem of Xuxiang kiwifruit fruit, washed with clean water to remove dirt on the surface of the fruit, then soaked in the compound extract of honeysuckle for 8-12 min, then treated with 2% chitosan coating, ventilated and dried, packed with PE preservative bag, 6 bags in the storage room, the temperature of the storage room is 20-25℃, humidity under natural conditions. The compound extract of honeysuckle is made by soaking high quality honeysuckle, galangal and clove in water for 25 min, then boiling for 25 min, cooling, then soaking kiwifruit for 8-12 min, then treated with 2% chitosan coating, ventilated and dried, packed and stored. After 50 days of storage, the fruit is still very fresh, and the good fruit rate can reach more than 80%.

[0010] Example 1

[0011] The 8 mature, uniform size, no disease and insect pests, no mechanical damage, with fruit stem of Xuxiang kiwifruit fruit, washed with clean water to remove dirt on the surface of the fruit, then soaked in the compound extract of honeysuckle for 8-12 min, then treated with 2% chitosan coating, ventilated and dried, packed with PE preservative bag, 6 bags in the storage room, the temperature of the storage room is 20-25℃, humidity under natural conditions. The compound extract of honeysuckle is made by soaking high quality honeysuckle, galangal and clove in water for 25 min, then boiling for 25 min, cooling, then soaking kiwifruit for 8-12 min, then treated with 2% chitosan coating, ventilated and dried, packed and stored. After 50 days of storage, the fruit is still very fresh, and the good fruit rate can reach more than 80%.

[0012] Example 2

[0013] The 8 mature, uniform size, no disease and insect pests, no mechanical damage, with fruit stem of Xuxiang kiwifruit fruit, washed with clean water to remove dirt on the surface of the fruit, then soaked in the compound extract of honeysuckle for 8-12 min, then treated with 2% chitosan coating, ventilated and dried, packed with PE preservative bag, 6 bags in the storage room, the temperature of the storage room is 20-25℃, humidity under natural conditions. The compound extract of honeysuckle is made by soaking high quality honeysuckle, galangal and clove in water for 25 min, then boiling for 25 min, cooling, then soaking kiwifruit for 8-12 min, then treated with 2% chitosan coating, ventilated and dried, packed and stored. After 50 days of storage, the fruit is still very fresh, and the good fruit rate can reach more than 80%.

[0014] Example 3

[0015] Select 8 mature, uniform size, no disease and insect pests, no mechanical damage, with fruit stem of Actinidia kolomikta fruits, after washing, put into the honeysuckle compound extract (containing honeysuckle 6 g / L, high kank 6 g / L, clove 6 g / L) for 12 min, then use 2% chitosan coating treatment, ventilation and dry, use PE preservative bag packaging, put in storage room, the temperature of storage room is 24 ℃, humidity natural conditions for storage. Compared with the untreated fruits, the fresh-keeping period of Actinidia kolomikta is extended by 20 days.

[0016] Finally, it is pointed out that the above examples are only used to illustrate the technical solutions of the present application but not limit the present application, and other modifications or equivalent replacements to the technical solutions of the present application made by those skilled in the art should be covered in the scope of claims of the present application as long as they do not depart from the spirit and scope of the technical solutions of the present application.

Claims

1. A method for preserving Xu Xiang kiwifruit treated with a compound extract of honeysuckle combined with chitosan coating, characterized in that... Fresh, 80% ripe Xu Xiang kiwifruit was first treated with a compound extract of honeysuckle, and then coated with chitosan for preservation. The steps are as follows: (1) Material harvesting: Select Xu Xiang kiwifruit that are 80% ripe, uniform in size, free from pests and diseases, free from mechanical damage, and have fruit stalks as materials. (2) Honeysuckle compound extract: After washing the selected Xu Xiang kiwi fruit, treat it with honeysuckle compound extract containing 6-12g / L honeysuckle, 6-12g / L galangal and 6-12g / L clove for 8-12 minutes, then coat it with chitosan, and finally air dry it. (3) Packaging and storage: After treatment, the Xuxiang kiwifruit fruits are placed in a PE breathable film and stored in a storage room at a temperature of 20-25℃ and under natural humidity conditions.

2. The preservation method according to claim 1, characterized in that... The honeysuckle, galangal, cloves, chitosan, and PE film used are all commercially available.