核农学报2025，Vol.39Issue(11)：2418-2431,中插6,15.DOI:10.11869/j.issn.1000-8551.2025.11.2418
热泵-远红外联合干燥对稻谷品质和稻谷表面菌群组成的影响
Effect of Heat Pump-Far Infrared Drying on Unhusked Rice Quality and Surface Microbial Composition
摘要
Abstract
To improve the efficiency and quality of postharvest drying of unhusked rice,the far-infrared radiation drying with heat pump drying(HPD)were combined in this study.The drying conditions were optimized,and the effects of the heat pump-far-infrared drying(HP-FIRD)method on the processing quality,edible quality,and surface microbial composition of unhusked rice were analyzed.Our results showed that the optimal parameters for the HP-FIRD method were temperature of 50℃,thickness of 2 cm,and far-infrared power of 800 W.The HP-FIRD method increased the average drying rate,brown rice rate,head rice rate,sensory score,and total phenolic content of rice,with reduced average energy consumption,broken rice rate,yellow rice rate,fatty acid value,malondialdehyde content,and conductivity compared with sun drying(SD)and HPD methods.Headspace gas chromatography ion mobility spectrometry(HS-GC-IMS)analysis identified a total of 36 volatile compounds in rice,mainly including aldehydes,alcohols,ketones,esters,pyrazines,and furans,wherein the ketone compound content in rice treated by the SD and HP-FIRD methods was significantly lower than that in rice treated by HPD method.16S rDNA and internal transcribed spacer(ITS)high-throughput sequencing revealed that HP-FIRD method could significantly inhibit the proliferation of Fusarium,Staphylococcus,Burkholderia-Caballeronia-Paraburkholderia,Cladosporium_sp,and Burkholderia_glumae on the surface of unhusked rice compared with the SD and HPD methods.Hence,the rice treated by the HP-FIRD method had higher processing and edible quality,and the risks of harmful bacteria and fungal infections in unhusked rice were significantly(P<0.05)reduced compared with the SD and HPD methods.The research findings provide critical data that could help develop the HP-FIRD technology for grain drying.关键词
稻谷/热泵-远红外联合干燥/食用品质/挥发性物质/菌群组成Key words
unhusked rice/heat pump-far-infrared drying/edible quality/volatile substances/microbial community引用本文复制引用
李金媚,章铖,汪宇飞,方冠宇,吴峰华,胡浩,刘兴泉,张永柱..热泵-远红外联合干燥对稻谷品质和稻谷表面菌群组成的影响[J].核农学报,2025,39(11):2418-2431,中插6,15.基金项目
浙江省"三农九方"科技协作计划项目(2022SNJF011) （2022SNJF011）
