1. 东北农业大学动物科技学院，黑龙江 哈尔滨 150030 2. 中国环境管理干部学院，河北 秦皇岛 066004 3. 东北农业大学理学院，黑龙江 哈尔滨 150030 4. Department of Animal and Poultry Science, University of Saskatchewan, 51 Campus Drive, Saskatoon, SK, Canada, S7N 5A8
Analysis and Estimate of Corn CNCPS Component by Near Infrared Reflectance (NIR) Spectroscopy
YANG Fang1, XIE Cheng-wei2,LIU Da-sen1,3*, Yu Peiqiang4, LI Zhong-yu1
1. College of Animal Science and Technology, Northeast Agricultural University, Harbin 150030, China 2. Environment Management College of China, Qinhuangdao 066004, China 3. College of Science, Northeast Agricultural University, Harbin 150030, China 4. Department of Animal and Poultry Science, University of Saskatchewan, 51 Campus Drive, Saskatoon, SK, Canada, S7N 5A8
Abstract：The objective of the present study was to investigate the feasibility of predicting the CNCPS (cornell net carbohydrate and protein system) composition of corn by near infrared reflectance spectroscopy (NIRS). Sixty-five corn samples from Heilongjiang province were used. The partial least square (PLS) regression method, second derivative and Norris derivative filter were applied in the NIRS prediction of CNCPS. For dry matter, crude protein, ash, fat, starch, neutral-detergent fiber and acid-detergent fiber, the determination coefficients were 0.974 3, 0.968 3, 0.947 8, 0.909 8, 0.977 7, 0.935 4 and 0.926 9, and the SD/RMSEP values for them were 3.96, 4.78, 3.75, 4.25, 4.13, 3.88 and 3.12, respectively. The determination coefficient and SD/RMSEP value were 0.857 5 and 3.06 for soluble protein, but low determination coefficients of 0.531 9 and 0.683 3 with SD/RMSEP values of 5.50 and 2.85 were observed for acid-detergent insoluble protein and neutral-detergent insoluble protein. If the SD/RMSEP value ＜5 and ＞3, then the effect of model is ideal, and if the SD/RMSEP value ＞5 or ＜3, the effect of model is not ideal, and at this time, the degree of accuracy of model needs further to be improved. The results of this study indicated that corn nutritive values could be fast and accurately predicted by NIRS. This model was significant in practice for enriching the rapid quantitative methods of determining animal feed materials.
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