摘要： 选用来自我国主要产地的大白菜不同品种及不同成熟期等材料242份，进行常规成分的定标和检验。结果表明：粗蛋白、中性纤维、还原糖及维生素C的近红外NIR）法测值与化学法测值的复相关系数MR）分别为0.9958、0.9852、0.9821和0.9814,定标的标准误差SEC）分别为0.398%、0.134%、0.098%和0.51mg/100g.用一定数量的检验样品对4种成分化学法与近红外法进行比较，检验结果指出两法的相关系数R）分别为0.994、0.978、0.974和0.981,检验标准误差SEP）分别为0.353%、0.127%、0.108%和0.548mg/100g.表明，用近红外法测定大白菜的营养成分具有与化学法相近似的准确性和精密度，可以在实践中应用。

关键词: 近红外光谱, 大白菜, 营养成分

Abstract: This paper described the calibration and prediction of the major nutritional components in 242 samples of Chinese cabbage on a NIRsNear Infrared spectrophotometer).These samples of different cultivars and mature periods were collected from the main producing area in China.The results showed that the multiple correlation coefficientsMR)between the content values of crude protein CP),neutral detergent fibreNDF),reduced sugarsRS)and vitamin CVC)determined by NIRs and chemical analysis were 0.9958,0.9852,0.9821 and 0.9814,respectively,with the standard errors of calibrationSEC)being 0.398%,0.134%,0.098% and 0.51mg/100g correspondingly.Comparison of each pair of values for each of 4 nutrients,determined by NIRs and chemical analysis respectively showed that the correlation coefficients between the above methods for the 4 nutrients were 0.994,0.978, 0.974,and 0.981,with the standard error of prediction SEP) being 0.353%,0.127%,0.108%,and 0.548mg/100g respectively.This indicates that NIRs is comparable to chemical methods in both accuracy and precision and is a reliable method for the determination of nutrients in Chinese cabbage.

Key words: NIRs, Chinese cabbage, Nutrients

中图分类号: 

• S634.101