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Method for fruits biological freezing point preservation and the storehouse

A fresh-keeping method and fresh-keeping storage technology, applied in the fields of fruit and vegetable fresh-keeping, food preservation, food science, etc., can solve problems such as difficult control and slow development, and achieve the effect of improving quality, excellent performance, and optimizing combined refrigeration system

Inactive Publication Date: 2008-06-25
CHINA AGRI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Disadvantages of modified atmosphere preservation: not all fruits are suitable for modified atmosphere preservation
[0006] However, because the law was not easy to control, its development was slow at one time

Method used

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  • Method for fruits biological freezing point preservation and the storehouse
  • Method for fruits biological freezing point preservation and the storehouse

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] Embodiment 1: The impact of spraying calcium on fruit firmness

[0038] In 2006, the late-maturing peach Jingyan from the Huaijia orchard in Xinli Village, Nandulehe Township, Pinggu District was used as the test material, and 15 Jingyan plants with moderate growth and moderate fruiting were selected. On July 4th, July 10th, July 26th, August 1st, August 8th, and August 16th, the concentration of 0, 0.5%, 1%, and 1.5% nitric acid was sprayed on the tree respectively. Calcium solution, contrast is water and sodium nitrate, and the spray dose to every tree is 2.5 liters / tree, and each treatment is repeated 3 times. The fruit harvest date is September 11 (normal production and harvest date). After harvesting, the fruit was stored in a refrigerator at 0°C, and samples were taken on day 0, day 5, and day 10, and the hardness, soluble solids, etc. were measured.

[0039] As shown in Figure 1, the fruits after calcium spraying had no significant difference in firmness betwee...

Embodiment 2

[0040] Embodiment 2: the impact of different bagging on fruit quality

[0041] In this experiment, Jingyan (11-year-old, rootstock is peach) was used as the test material. The fruit bags used are conventional bags and sulfuric acid paper bags, the conventional bags are basically opaque, and the light transmittance of the sulfuric acid paper bags is about 50%. The sulfuric acid paper bag is homemade, made of sulfuric acid paper for ordinary drawing, and the size is the same as that of a conventional bag.

[0042] The bagging and harvesting periods are consistent with the general production period, and the bagging and harvesting periods of Jingyan are 8 / 4 and 9 / 11 respectively. Jingyan is out of the bag at 9 / 1. (See Figure 2, Figure 3)

[0043] As shown in Figure 2 and Figure 3, the hardness of the sulfuric acid paper bag is significantly higher than that of the conventional bag. There was no significant difference in soluble solids among the treatments.

Embodiment 3

[0044] Embodiment 3: the influence of paving reflective film on the color and luster formation of face fruit

[0045] In this experiment, Huayu (grafted from Pantao Gao last year) was used as the test material. Paper bag specifications are as above, with no bag (CK) as a control. The bagging and harvesting periods are consistent with the general production period, 7 / 13 and 9 / 5 respectively. The bag was removed twice on 8 / 17 and 8 / 29 respectively, and the reflective film was laid at the same time as the bag was removed for the first time. The fruit in the conventional bag without reflective film was used as the control. (see Fig. 4, Fig. 5, Fig. 6) the fruit gets the fruit of 1.5 meters (surrounding the tree crown) and 1.0 meters (the inner chamber of the tree crown) from the ground.

[0046] As shown in Figure 4, the anthocyanin synthesis of the backlit surface of the fruit of each treatment of the Huayu variety, whether it is the fruit on the upper part of the tree crown o...

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Abstract

The invention relates to a fresh-keeping method and a fresh-keeping storehouse of a biological freezing point for fruits belonging to an agricultural products processing field. The fresh-keeping method of the biological freezing point for the fruits includes the steps: spraying calcium salt in the process of cultivating, sleeving a transparent bag or spreading a reflecting film to improve hardness and sugar degree of the fruits; carrying out rapid cooling before putting in the fresh-keeping storehouse in a pre-cooling room; after putting in the fresh-keeping storehouse, processing with a preservative; then regulating the temperature to a critical point of the freezing point with humidity of over 90%; adopting stage heating after leaving the fresh-keeping storehouse. Preservation period of late maturing peach is prolonged to 3 months; the fruits processed by the steps are fresh as before and the phenomenon such as browning, softening and rotting do not exist. The cost of the supporting fresh-keeping storehouse constructed based on the invention is about 1.2 times of that of a low temperature cold storage and 1 / 2-2 / 3 times of that of an air conditioned storehouse with the same volume; fresh-keeping effect is remarkably superior to the low temperature cold storage and the air conditioned storehouse; the invention can promote the creativity and development of relevant industries such as a transport case and a transport vehicle of the biological freezing point as well as the relevant culture of the biological freezing point; the invention is a technology with a wide prospect and favorable economic benefits.

Description

technical field [0001] The invention relates to the field of agricultural product processing, in particular to a biological freezing point fresh-keeping method for fruit and a fresh-keeping store. Background technique [0002] The preservation and processing of agricultural products is the continuation of agricultural production and the "secondary economy" in the process of agricultural reproduction. All developed countries put post-production storage and processing at the forefront of agriculture. For example, 30% of the total agricultural investment in the United States is used for pre-harvest. 70% is used for post-harvest; the industrialization rate of fresh-keeping agricultural products in Italy and the Netherlands is 60%, and that in Japan is more than 70%. The ratio of post-production output value to natural output value at harvest is 3.7:1 in the United States, 2.2:1 in Japan, and only 0.38:1 in my country, which is almost put on the market in its original state, so t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A23B7/00A23B7/04A23B7/153A23B7/16A23B7/148
Inventor 冷平袁汉青
Owner CHINA AGRI UNIV
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