Postharvest Cold Storage of Blueberry: Problems and Solutions XixuanJin, Ph.D. Chief Scientist ，...

Postharvest Cold Storage of Blueberry: Problems and Solutions

XixuanJin, Ph.D.Chief Scientist ， Joyvio Group

© 2013 JOYVIO. All rights reserved.


By the late 1980s, the cultivated area of blueberry in American had reached

nearly 200,000 hectares. Blueberry produced in the US not only meets its own

needs, and has also been exported to Canada, Japan, China Taiwan and

European countries.

Currently, there are nearly 20 countries and regions worldwide which have

begun industrialized blueberry cultivation. China has introduced over 100

blueberry varieties mainly from America and Japan and adaptable for the

climatic conditions across the country.

2

Domestic and international blueberry cultivation



Domestic and international blueberry cultivation

In 1983, Professor Li Yadong at Jilin Agricultural University took the

lead in China to carry out the introduction and cultivation of blueberries.

By the end of 2013, China's blueberry acreage had reached 15,000-

16,000 hectares, mainly in Heilongjiang, Jilin, Shandong, Anhui, and other

11 provinces (autonomous regions).

Qingdao is China's most concentrated area for blueberry production and

has a blueberry cultivation area of nearly 4,000 hectares.

3


Postharvest cold storage of blueberry: Problems

Pre-cooling technologies lagged behind

Short storage life

Market calls for“Ready-to-Eat”blueberries

4



• The purpose of the pre-cooling: quickly remove field heat, reduce

disease incidence and facilitate cold storage.

• Rot damages caused by inadequate pre-cooling can reach as high

as 30-50%.

• The main pathogens are Botrytis spp and Rhizopus spp. They

may continue to grow at lower temperatures. Botrytis may grow at

or even below 0℃.

5

1. Pre-cooling



Development of pre-cooling technology

• Large vacuum cooling machine:This machine can pre-cool a variety of fruits and vegetables with high efficiency. It may pre-cool large amount of fresh produce up to 5 cubic meters. Energy consumption is very high.

• Large mobile pre-cooling machine:This machine is suitable for field harvesting and container transportation. However, it is not cost effective, and doesn’t fit the needs of today’s blueberry industry in rural China.

6



A miniature cooling machine

7



2. Short storage life

• (1)MODIFIED ATMOSPHERE STORAGE:

The so-called modified atmosphere is proportional adjustments of the

atmosphere composition, such as oxygen, carbon dioxide and relative

humidity in a storage facility to extend the storage life of fruits and

vegetables.

• (2)Cai Songsong, Engineer in Post Harvest Management at Qingdao

Wallen Blueberry Fruit Co., Ltd. has made considerable contributions in

this area.

8


© 2013 JOYVIO. All rights reserved.9

气调贮藏 -1

• 试验结果（ 2010 年）

保鲜方式不同贮藏时间的好果率 / %

30天 45天 60天 75天气调贮藏 100 98.5 97.5 93.7

保鲜袋 100 90.7 80.4

保鲜方式贮藏 60天，暂存期与货架期对比 / %

10℃成品库3天

10℃成品库6天常温 1天常温 2天

气调贮藏 100 95 95 86

保鲜袋 95 77 77 61

品种不同品种气调贮藏 60天品质对比 / %

SSC 酸度糖酸比采收贮藏采收贮藏采收贮藏

蓝丰 12.7 12.3 0.28 0.21 45 59

达柔 11.0 10.3 0.38 0.38 29 27

埃利奥特 10.8 10.4 0.85 0.81 13 13

贮藏期间损耗率 /

%

贮 40天贮 60天

气调贮藏 0.203 0.362

保鲜袋 3.61

气调贮藏 75 d，保鲜袋贮藏 30-35 d 气调贮藏 60 d低温暂存与常温货架较好，保鲜袋贮藏 60d，效果较差，贮藏期过长

气调贮藏蓝莓能保持果实内部品质。气调贮藏重量损耗低。



气调贮藏 -2

• 试验结果（ 2011 年）• 贮藏第 83 天（ 12 周），硬度较好，好果率达 92.5% 。

• 国际贮藏周期 6 周

• 智利最长 60 天（ Claudio

智利专家）



气调贮藏 -3

• 8 吨生产小试（ 2011 年）

• 生产分选包装结果• 贮藏时间 55 天（ 9 月 2 日），原料总体硬度、饱满度、好果情况较好，生产机械分级包装平均成品率为 92% ，远远高于 7 、 8 月份硅窗袋贮藏原料平均成品率 84% 。



气调贮藏 -4

• 8 吨生产小试（ 2011 年）

气调贮藏原料车间抽检结果（车间统计数据）

• 销售追踪• 九月初市场缺货，走货快。双层反射膜打包，北京到货软果较多，达 10% ，长期贮藏的原料经机械分级、包装或物流导致；上海到货果粉、状态等品质良好。

基地不同次品类型比例 / %

总计烂果软果鸟啄果蛛网

西尚沟 2.6% 0 0 0 2.6%

臧家庄 2.3% 0 0 0 2.3%

臧家庄 B 2.9% 0 1.2% 1.5% 5.6%

长阡沟 2.8% 0 1.0% 1.4% 5.2%

臧家庄 B 2.3% 0 0.5% 1.9% 4.7%

西寨 2.9% 0 2.4% 1.2% 6.5%

西安子 2.2% 4.6% 0.8% 0 7.6%

平均值 2.6% 0.7% 0.8% 0.9% 4.9%



3 、 The market needs ready- to –eat blueberries

• Ready to eat fruit and vegetables are becoming the new darling of

the market, and a lot of open bag “read-to-eat” fruits and vegetables are

in almost every supermarket in the developed countries. However,

there is much less R & D works in China.

13



Apples Day 21Apples Day10Apples Day 1

Edible coatings work well in protecting processed fruit and vegetables



Carrots Day 1 Carrots Day 10 Carrots Day 21



Lettuce Day 14Lettuce Day 7Lettuce Day 1




谢谢

Date post:	19-Dec-2015
Category:	Documents
Upload:	jeremy-lester
View:	223 times
Download:	4 times

Postharvest Cold Storage of Blueberry: Problems and Solutions XixuanJin, Ph.D. Chief Scientist ，...

Documents