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《Scientia Silvae Sinicae》 2004-06
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Effect of Postharvest High CO_2 Shock Treatment on the Storage Quality and Performance of Chinese Chestnut(Castanea mollissima Blume)

Liang Lisong Wang Guixi (Research Institute of Forestry, CAF Key Laboratory of Forest Silviculture of the State Forestry Administration Beijing 100091) Sun Xiaozhen (Weinan Institute of Agricultural Sciences,Shaanxi Province Weinan 715501)  
In this paper the effects of postharvest high CO 2(30~80) shock treatment on the storage quality and performance of Chinese Chestnut(Castanea mollissima Blume,cv. dahongpao)at 0 ℃ were studied. The CO 2 treatment duration and CO 2 concentration were the main factors affect the quality. The ADH (alcohol dehydrogenase) activity and accumulation of alcohol was increased remarkably by the high CO 2 shock treatment. The longer the treatment time was and higher the CO 2 concentration was, the higher the ADH activity and alcohol concentration were. High CO 2 shock treatments affect the metabolism of starch and soluble sugar. 30%~50 CO 2 could retard the decomposition of starch, while 60~80 CO 2 could increase the decomposition rate. The decay rate of chestnut treated with 40 CO 2 for 20 days was only 1 at the end of 120-day cold storage, and which was the best treatment to keep the storage quality and performance of chestnut among the high CO 2 shock treatments. The Chinese Chestnut was not hurt in all CO 2 concentrations treatments if the treatment duration was not more than 10 days, but it become off flavor if the Chestnuts were treated for more than 20 days and the index of off flavor Chinese Chestnut was positive to the CO 2 concentration. The Chinese Chestnut could be reversibly hurt if CO 2 concentration was over high(50) and time of treatment was over long(20 days) and the flavor was not recovered even at the end of storage.
【Fund】: 国家重点科技项目“经济林产品贮藏保鲜及加工技术研究”(国家计划委员会部门专项G0 1)的部分内容
【CateGory Index】: S664.2
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