中文摘要：非洲撒哈拉以南地区的农民用普渡改进粮食储存(PICS)袋储存包括玉米在内的粮食和农产品，进行防虫管理。这些袋子严密地密封农产品，阻止水分和气体与外界交换。袋内生物的呼吸营造了一个不适合昆虫发育和真菌生长的环境。本研究旨在确定玉米消费时常规开启储存袋对真菌生长及黄曲霉毒素污染的影响。结果表明反复打破PICS袋密封将增加真菌生长和黄曲霉毒素污染的风险，特别是在储存的玉米水分含量较高的情况下。本研究进一步论证了玉米用PICS袋储存前应适当干燥。
外文摘要：Purdue Improved Crop Storage (PICS) bags are used by farmers in Sub-Saharan Africa for pest management of stored grains and products, including maize. These bags hermetically seal the products, preventing exchange with external moisture and gases. Biological respiration within the bags create an environment that is unsuitable for insect development and fungal growth. This study was conducted to determine the impact of routine opening of the storage bags for maize consumption on fungal growth and aflatoxin contamination. Maize with moisture contents (MC) high enough to support fungal growth (15%, 16%, 18% and 20%) was stored in PICS bags, which were opened weekly and exposed to humid conditions (85% RH) for 30 min over a period of 8 weeks and 24 weeks. Monitors indicated that oxygen defused into the open bags but did not reach equilibrium with the bottom layers of grain during the 30-min exposure period. Fungal colony forming units obtained from the grain surface increased 3-fold (at 15% MC) to 10,000-fold (at 20% MC) after 8 weeks. At both 8 weeks and 24 weeks, aflatoxin was detected in at least one bag at each grain moisture, suggesting that aflatoxin contamination spread from a planted source of A. flavus-colonized grain to non-inoculated grain. The results indicate that repeatedly breaking the hermetic seal of the PICS bags will increase fungal growth and the risk of aflatoxin contamination, especially in maize stored at high moisture content. This work also further demonstrates that maize should be properly dried prior to storage in PICS bags.
作者：Tubbs, T；Baributsa, D；Woloshuk, C
作者单位：Purdue Univ
期刊名称：JOURNAL OF STORED PRODUCTS RESEARCH
期刊影响因子：1.533
出版年份：2016
出版刊次：10
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