用近红外光谱法快速分析玉米青贮饲料青贮发酵品质

Rapid Analysis of Silage Ferment Quality of Corn Ensile Using Near Infrared Spectroscopy

采用DA-7200型近红外光谱仪的近红外漫反射光谱技术建立了玉米青贮饲料发酵产物及总分定量分析模型。所建立的有机酸氨态氮总分近红外模型的检测结果优于乳酸、乙酸等6项发酵产物的近红外模型的检测结果。其中,有机酸氨态氮总分近红外模型的预测相关系数为0.8453,预测均差为10.3582。青贮品质的判断准确率为80.15%。综合结果表明,利用近红外光谱法可以定量测定玉米青贮饲料的有机酸氨态氮总分并分析其品质的优劣,对于丰富青贮饲料青贮品质快速检测手段具有实际应用意义。

A quantitative analysis model for silage ferment quality of corn ensile is established by using the near infrared spectroscopy. The detection result of the near infrared model established for organic acid and ammoniacal nitrogen is better than that of the near infrared model established for six ferment products such as lactic acid and acetic acid. The near infrared model established for organic acid and ammoniacal nitrogen has a prediction correlation coefficient of 0.8453 and a mean difference of 10.3582. Its judgment accuracy for silage quality is 80,15 %. The experimental result shows that the near infrared spectroscopy can be used to quantitatively analyze the organic acid and ammoniacal nitrogen content of corn ensile and is expected to be a rapid detection tool for the silage ferment quality of corn ensile.