关键词: 储藏方式, 麦麸, 螨, 生态群落

Abstract:

Objective To investigate the species and ecological differences of mite breeding in wheat bran stored in different ways. Methods Twenty-five wheat bran samples stored in different ways (bulk, package, and bucket) were collected from northern Anhui province, China. Mites breeding in the samples were isolated, identified, and counted. The following ecological indices were analyzed: breeding density, richness index, diversity index, and evenness index. Differences in the rate of mite breeding between the three storage methods were examined using 2 test. Results Eight species of mites were identified from 75 wheat bran samples, mainly including Caloglyphus berlesei (40.7% ) and Tyrophagus putrescentiae (33.3%). The breeding densities of mites in bulk, package, and bucket storage were 0.50, 0.25, and 0.30 mite/g, respectively. The corresponding values of richness index were 1.59, 1.18, and 0.94, respectively;the values of diversity index were 1.536, 1.222, and 1.167, respectively;the values of evenness index were 0.739, 0.759, and 0.725, respectively. The rates of mite breeding in bulk, package, and bucket storage were 48.0%, 24.0%, and 16.0%, respectively, with significant differences between the three storage methods ( χ²=6.047, P<0.05). Conclusion Mite breeding exists in wheat bran storage in northern Anhui province, where the rate of mite breeding is affected by the way of storage.

Key words: Storage method, Wheat bran, Mite, Ecological community