Fresh-keeping method of phyllostachys pracecox shoots

Abstract

The invention discloses a fresh-keeping method of phyllostachys pracecox shoots, which comprises the following steps of: (1) immersing the phyllostachys pracecox shoots into 5-10 times volume of an ice and water mixture within 30min after harvesting the phyllostachys pracecox shoots, stirring for 1-5min to cool the phyllostachys pracecox shoots to 3 DEG C; (2) dissolving 10-45g of chitosan sugar into 1 liter of 2% citric acid solution to obtain a film coating agent, immersing the phyllostachys pracecox shoots in step (1) into the film coating agent for 10-25 seconds, throwing away the residual solution, standing and drying to form a film; (3) preparing mixed gas of oxygen and carbon dioxide according to a volume ratio of the oxygen to the carbon dioxide being 1.5:8.5-2.0:3.0, then doping with 5-30% (volume) of nitrogen to prepare the mixed gas for air-conditioned storage of the phyllostachys pracecox shoots; packaging the phyllostachys pracecox shoots in the mixed gas of the oxygen, the carbon dioxide and the nitrogen by a food-grade aluminum foil bag, and storing at 3 DEG C in a refrigerator. The method provided by the invention realizes medium and long-term freshness preservation of the phyllostachys pracecox shoots, still keeps faint scent and crisp characteristic after 90-day storage, and achieves high quality levels in sensory evaluation, weight loss rate, protein content, total sugar content and crude fiber content.

Description

technical field [0001] The invention belongs to the field of storage and processing of agricultural products, and relates to a fresh-keeping technology for agricultural products of fruits and vegetables, in particular to fresh-keeping of bamboo shoots and other bamboo shoots. Background technique [0002] Phyllostachys praecox is an excellent cultivated edible bamboo species unique to China. It was originally mainly distributed in the hilly plains in northwest Zhejiang. Thunder bamboo has the characteristics of early shoots, high yield, delicious shoots, annual shoots, high benefits, and strong adaptability. Since the 1990s, it has been grown in Jiangxi, Jiangsu, Anhui, Fujian, Hubei, Yunnan and Guizhou provinces. Some counties (cities) and most counties (cities) in Zhejiang are widely introduced and cultivated. [0003] Like other bamboo shoots, the harvesting time of thunder bamboo shoots is relatively concentrated, the harvesting period is short, the vitality is strong a...

AI Technical Summary

Problems solved by technology

In 2010, the total output of fruits and vegetables in my country reached 100 million tons and 600 million tons respectively. However, due to the serious backwardness of our country's fruit and vegetable preservation, storage and transportation capacity, the annual loss caused by fruit and vegetable rot exceeds 80 million tons, and the direct economic loss is as high as 75 billion yuan.