Study On Fresh-Keeping Technology Of Fresh-Cut Narrowleaf Cattail

Narrowleaf cattail is a high nutritional vegetables, and is suitable for fresh-cut processing. Postharvest respiration for narrowleaf cattail is very strong due to the delicate cattail stem, which is easy to aging.Multipling rapidly microbial for postharvest in storage, transportation and processing is extremely easy to cause decomposing of narrowleaf cattail. The critical controlling factors such as germicide., storage temperature and packaging method was researched in this paper,Study is expected to provide some theoretical basis for the production and storage of fresh-cut narrowleaf cattail.Chlorine dioxide for a substitute of chlorine was studied. Different concentration of Chlorine dioxide solution was used to Immersiing fresh-cut narrowleaf cattail. Result showed that chlorine dioxide solution were effective in controlling the microbes in narrowleaf cattail. Treatment with 45 mg/L,70 mg/L,95 mg/L resulted in reductions of total bacteria. The effect was directly related with the concentration of chlorine dioxide. However,chlorine dioxide treatments reduced fibre, and their blanching effects affected sensory qualities. In addition, ascorbic acid and reducing sugar in fresh-cut narrowleaf cattail were oxidated to different extent by different concentration. The best effect of preservation fresh- cut of narrowleaf cattail appeared to be treatment of 45 -70 mg/L chlorine dioxide.The Effect of fresh-keeping for storage temperature on fresh-cut narrowleaf cattail was studied. The result showed that low temperature was very effective on fresh-keeping of fresh-cut narrowleaf cattail.At room temperature, the fresh-cut narrowleaf cattail was very fast changed. The content of ascorbic acid, fibre and reducing sugar decreased rapidly,and the microbes increased fast which resulted in the spoilage of tissue.however, at 0℃ and 4℃,fibre degradation was delayed, and the reducing sugar and ascorbic acid losses wered reduced, and also water in fresh-cut narrowleaf cattail was kept well.The fresh-cut narrowleaf cattail stored at 0℃ was better in quality than in 4℃.Four ways of packaging for no film packaging, "Miao Jie" bag, "South Asia" fresh-keeping film and common fresh-keeping bag was choosed on fresh-keeping of fresh-cut narrowleaf cattail. The results showed that the "south Asia" fresh-keeping film packing can maintained fibre of the fresh cut narrow leaf cattail, reduced respiration rate, delayed the ethylene releasing, and the storage products has better quality.