Abstract
In many developing countries, milk production varies greatly according to farm size, cattle breed, and milking practices. However, production systems often are dominated by smallholder farms. Therefore, relatively small volumes of milk are delivered daily from numerous farms to intermediate cooperatives which supply industrial units. This paper argues that in such two-stage dairy chains, milk quality could be improved by focusing on farming practices rather than on the testing of individual deliveries. Indeed, it is difficult to analyze their quality due to technical, economic, and logistic limitations. The objective of this study is to link on-farm practices with milk chemical quality parameters (fat and protein) and hygienic quality criteria (Aerobic Plate Count, APC and Coliforms). Cattle management practices were monitored monthly over one year on 23 farms located on an irrigation scheme in Morocco. 276 milk samples were analyzed. The monthly variability of milk quality parameters was then characterized. Results show that average cow milk chemical parameters vary within a normal range. They remain primarily linked to the genetic type of cows, the lactation stage, and the conversion of feed concentrates’ net energy into milk. Overall milk hygienic quality was poor (APC and Coliforms counts were 100 fold international norms), due essentially to a lack of hygiene and inadequate milking conditions (hands, udder, and teat washing, type of bucket used, dirtiness of cows...). It is suggested that a close monitoring of herd management practices may allow the indirect control of milk quality parameters, thereby avoiding costly analyses of numerous smallholder milk deliveries.
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Acknowledgements
This study was conducted with the support of the SIRMA project (Water Saving in Irrigation Systems in North Africa), financed by French institutional co-operation and North African countries. The authors address their special thanks to the dairy farmers of the Tadla scheme for their kind participation and support in herd monitoring. The help of Mr. Letourmy P. (CIRAD, Montpellier) in the statistical analyses was well appreciated, as were the suggestions of improvement provided by Mr. Moulin C.-H. on an earlier version of this paper. Last but not least, the authors would like to thank Mr Elayachi A., local executive officer of the Tadla dairy factory, who provided crucial logistical support.
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Sraïri, M.T., Benhouda, H., Kuper, M. et al. Effect of cattle management practices on raw milk quality on farms operating in a two-stage dairy chain. Trop Anim Health Prod 41, 259–272 (2009). https://doi.org/10.1007/s11250-008-9183-9
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DOI: https://doi.org/10.1007/s11250-008-9183-9