以湖南湘西腊肉为研究对象，比较了橘子树枝、锯末、米糠、木粒、杂木五种烟熏材料燃烧烟熏过程中湘西腊肉理化、微生物及挥发性成分的变化。结果表明：5种烟熏材料燃烧烟熏的湘西腊肉水分含量均随着烟熏时间的延长而呈下降趋势；食盐含量随着烟熏时间的延长而呈上升趋势；苯并芘含量均随着烟熏时间的延长逐渐增加，但均未超标。5种烟熏材料燃烧烟熏的湘西腊肉成品中，其优势菌均为葡萄球菌和微球菌。橘子树枝、锯末、米糠、木粒和杂木燃烧烟熏的腊肉成品中分别鉴定出挥发性成分40种、29种、39种、19种和35种。锯末燃烧烟熏的腊肉成品中葡萄球菌和微球菌、乳酸菌、酵母菌数量都是最高的，再加上其燃烧烟熏产生的苯并芘含量最低，所以锯末是一种较为理想的烟熏材料。

Changes in physicochemical indices, microbial populations, and volatile compounds in Xiang-xi traditional Chinese bacon, caused by five smoking materials (orange branches, sawdust, rice husk, wood grains, and miscellaneous wood), were compared, with Hunan Xiang-xi bacon as the study object. The results revealed that with extended smoking time, moisture content of Xiang-xi bacon samples, prepared with one of the five smoking materials, decreased; salt content increased; and benzopyrene content gradually increased. None of these concentrations exceeded the national standard values. The predominant microorganisms in all the smoked Xiang-xi bacon products (prepared with each of the five smoking materials) were Staphylococcus and Micrococcus. A total of 40, 29, 39, 19, and 35 volatile compounds were identified in the smoked bacon products prepared using orange branches, sawdust, rice husk, wood grains, and miscellaneous wood, respectively. The bacon product prepared using sawdust had the highest counts of Staphylococcus, Micrococcus, lactic acid bacteria, and yeast, and the lowest benzopyrene content. Thus, sawdust is an ideal smoking material.

公益性行业（农业）科研专项（201303082）