内蒙古呼和浩特生鲜乳质量分级评价研究

doi:10.16431/j.cnki.1671-7236.2019.12.016

Abstract

Abstract: The purpose of this study was to analyze the effects of season and culture mode (canned milk and scattered milk) on the quality of raw milk in Hohhot,Inner Mongolia,and evaluate the quality of Hohhot canned milk according to the quality grading standard coming out in China,in order to provide reference for quality improvement and safety evaluation of raw milk in Inner Mongolia.Thirty batches of raw milk were collected from different dairy farm of Hohhot in each quarter from 2017 to 2018,a total of 240 batches in two years.According to the method of NY/T 2659-2014,NY/T 800-2004,GB 4789.2-2016 to detemine the milk fat rate,milk protein rate,somatic cell count (SCC) and colony count of raw milk.The results showed that the milk fat rate of raw milk in Hohhot from 2017 to 2018 were higher in the fourth quarter;The milk protein rate in the fourth quarter were 3.46% and 3.47%,which were significantly higher than that in the other quarters (P<0.05);The colony count in the third quarter were 2.50×10⁴ and 6.00×10⁴ CFU/mL,which were significantly higher than that in the other quarters (P<0.05);The SCC of fresh milk in 2017 was the highest in the first quarter (39.90×10⁴/mL),which were significantly higher than that in the other quarters (P<0.05),but there was no significant seasonal difference in SCC of fresh milk in 2018 (P>0.05).From 2017 to 2018,the milk fat rate of scattered milk produced by family breeding mode in Hohhot was significantly lower than that of canned milk produced by large-scale breeding mode,while SCC and colony count were significantly higher than that of canned milk (P<0.05).There were no significant difference in the milk fat rate and milk protein rate of canned milk between 2017 and 2018 (P>0.05),but SCC was significantly higher than that in 2018 (P<0.05),and the colony count was significantly lower than that in 2018 (P<0.05).To sum up,the seasons had a great influence on the milk fat rate,milk protein rate and the colony count of raw milk in Hohhot from 2017 to 2018,but had no obvious influence on SCC.In 2017 and 2018,the quality and safety level of family scattered milk were obviously lower than that of large-scale canned milk.The quality and safety level of canned milk were relatively high and reached the excellent standard.Therefore,large-scale breeding mode and high-quality milk production would become an inevitable trend.

Key words: Inner Mongolia; Hohhot; raw milk; quality; grading; season

CLC Number:

TS252.2

SONG Jie, AO Changjin, WANG Lifang. Study on Grading Evaluation of Raw Milk Quality in Hohhot,Inner Mongolia[J]. China Animal Husbandry and Veterinary Medicine, 2019, 46(12): 3590-3597.

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Study on Grading Evaluation of Raw Milk Quality in Hohhot,Inner Mongolia

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