Effect of polarized light treatment on milk production and milk somatic cell count of cows
2008
Fenyoe, M.,Polarium, Ltd. (Hungary) | Szita, G.,Szent Istvan Univ., Goedoelloe (Hungary). Dept. of Food Hygiene | Bartyik, J.,Agrar Co. Ltd. of Enying (Hungary) | Dora, J.,Polarium, Ltd. (Hungary) | Bernath, S.,Institute for Veterinary Medicinal Products (Hungary)
The aim of the present experiment was to investigate the effect of linearly polarized light (LPL) treatment on the udder of dairy cows. Before the start of treatment, there was no significant difference between cows to be treated with LPL and the control cows in mean somatic cell counts (SCC) of milk samples taken separately by udder quarter and in the mean milk yield. The LPL treatment lasted for 20 min and was performed twice a day over a period of one month. In a six-week period immediately after treatment, the mean SCC of both the treated and control group decreased. There was a significant difference in SCC between the groups in favour of the treated group. Before the LPL treatment, the average milk yield of cows in the group to be treated was 25.77 kg/ day, while that of the control cows was 27.30 kg/day. In a six-week period after treatment, the milk yield of cows in the treated and control groups was 28.83 and 25.48 kg/day, respectively. There was a significant difference between these values in favour of the treated group. The results show that a regular LPL treatment can significantly reduce the SCC of milk and significantly increase the milk yield. The treatment can be applied during lactation without interfering with the milking regime.
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