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Year : 2017
Tome : 168
Volume : 7-9
Pages : 151-163
Title : Effects of farming practices on the variation of hygienic and nutritional quality of raw milk in the north-central region of Algeria
Authors : S. KAOUCHE-ADJLANE
Summary : The relationship between the farming practices and the overall quality of 144 raw milk samples taken from 12 farms owning 295 dairy cows in the mid-northern region of Algeria were studied through monthly monitoring over a period of one year. The hierarchical clustering conducted reveals the existence of five classes of 18 to 43 milks. The study of the relationship between hygienic practices and the microbial composition of raw milks analyzed shows that the total aerobic mesophile flora (FMAT), total (CT) and faecal (CF) coliforms, yeasts and molds and pathogenic germs are correlated with all hygiene practices considered: maintenance and washing udders, clean milking equipment, cleaning stables and milker, housing conditions and trafficking, thereby confirming a real lack of hygiene. The nutritional quality of the milks analyzed with fat and protein levels of 37.2 and 30.2 g / kg respectively, shows that the best results relate to farms where the integration rate of the concentrate in the diet is less than or equal to 42.1 per cent. However, the annual variation in TB and TP of the collected milks indicates the extent of the changes in the fat ratio, with p <0.001 between the different farms and between the two seasons: 35.9 3.1 g / kg in the cold period and 38.5 2.3 g / kg in the warm period (CV = 7.9 percent), compared to the significantly more stable protein content (CV = 3.7 percent), reflecting the effect of food, mainly dominated by the massive intake of concentrates.
Keywords : Feeding practices, hygiene practices, raw milk, overall quality, milk classes
Correspondence : S. KAOUCHE-ADJLANE
Adress : Universit M?Hamed Bougara, dpartement de Biologie, Boumerdes 35000. Algrie. Corresponding author: kaouchesoumeya@yahoo.fr
Link : pdf

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