东北优质粳稻不同温度储藏条件品质变化研究

以吉林榆树地区超级稻(水分14.6%)为研究对象,分别置于15、20、25、30和35℃条件下模拟储藏,定期取样检测品质指标变化。结果表明,种用品质、储藏品质、加工品质、外观品质等各项指标受储藏温度影响较大,温度越高,稻谷各项品质下降越明显。短期储存时,将储藏温度控制在25℃或更低,能够保证稻谷的储藏、加工和外观品质满足相关标准要求。水分含量为14.6%的优质粳稻脂肪酸值与储藏温度和储藏时间呈二元非线性关系,可通过模型FAV=EXP(2.218+0.025T+0.003 t)对脂肪酸值的变化进行预测。综合各项品质指标变化情况,兼顾节约储粮成本因素,25℃准低温是较为经济实用的储藏温度,在该温度下14.6%优质粳稻可安全储藏6个月,且保持良好品质。

Study on the quality changes of high quality japonica paddy under different temperature storage conditions in northeast China

In this study,super paddy with moisture content of 14.6%in Yushu area of Jilin province was took as the research object.The paddy was stored under the conditions of 15,20,25,30 and 35℃,respectively,and the changes of various quality indexes were detected by sampling regularly.The results showed that the various indicators of seed quality,storage quality,processing quality and appearance quality were greatly affected by the storage temperature.The higher the temperature,the worse quality of paddy.During short-term storage,the storage temperature should be controlled at 25℃or lower to ensure that the storage quality,processing quality and appearance quality of the rice can meet relevant standards.The fatty acid value of high quality japonica paddy with 14.6%moisture content showed a binary nonlinear relationship with storage temperature and storage time,and the change could be predicted by the model FAV=EXP(2.218+0.025 T+0.003 T).On the basis of the changes of various quality indexes and the cost saving factor of grain storage,25℃quasi-low temperature is suggested as an economical and practical storage temperature,at which 14.6%high quality japonica paddy can be safely stored for 6 months and maintain good quality.