Abstract: Chahayang rice is a special brand of rice produced in Heilongjiang. In order to protect this brand, there is a need to establish a method for the rapid identification of Chahayang rice. In this paper, near infrared spectra of rice from a test paddy field were scanned in the full wavenumber range, and the characteristic bands for Chahayang rice were screened. Qualitative and quantitative analysis of 233 rice samples from Chahayang and other areas at the characteristic band were performed and compared. The results showed that the main factors associated with the geographical origin of Chahayang rice exhibited absorption bands in the wavenumber range of 5 136–5 501 cm-1. The rate of correct identification of Chahayang rice with the qualitative analysis model established based on the main factors was 100%, while that with the model developed through partial least squares (PLS) regression was 95.83%.

Key words: rice, near infrared spectroscopy, producing area, variety