Water treatment was associated with improved milk-production efficiency
Study findings
Treating contaminated water with chlorine dioxide reduced the amount of aerobic bacteria in the water by 27%, according to the analysis. The milk from cows given treated water had a somatic-cell count 72% lower than that of cows receiving contaminated water without treatment.
The experimental contamination did not alter either the animals’ water consumption or the volume of milk produced. Cows supplied with treated water nevertheless showed an improvement in the relationship between milk production and feed intake, an indicator used to assess feed efficiency in a herd.
Feed efficiency measures how effectively animals convert nutrients from their diet into milk. Feed is a significant component of dairy-production costs. The study reported an association under its experimental conditions and did not establish that water treatment would produce the same result on every farm.
Water quality and herd monitoring
Somatic-cell counting is used to monitor mammary-gland health and to support assessments of milk quality. Changes in the measure can be linked to inflammation and udder infections, although its interpretation also depends on other factors and on the conditions within the herd.
The findings indicate that the microbiological quality of water can be considered alongside other sanitary prevention and control measures on dairy farms. The research did not show, on its own, that treating water is sufficient to prevent disease or guarantee better milk quality at commercial scale.
Water use and farm management
High-producing dairy cows can consume between 120 and 150 litres of water a day, according to information presented by Kemin. Leandro Greco, the company’s technical-services manager, said: “When we talk about water quality, we are not talking only about cleanliness. A high-producing dairy cow can consume 120-150 litres of water in a single day. In this way, water can be considered the most-consumed ingredient in the diet and can be a route of exposure to microorganisms.”
Greco said the study showed that water quality could form part of a broader management strategy involving animal health and the efficiency with which cows convert feed into milk. Farm routines may include checking water quality, cleaning troughs, and inspecting pipes and storage tanks.
Biofilm formation and the accumulation of organic matter in supply systems can help microorganisms remain in place, making periodic checks of installations relevant. Any chlorine-dioxide treatment must take account of the water’s initial quality, the design of the supply system and the concentration used. Technical guidance and operational controls are required to maintain animal safety and ensure that the procedure is applied appropriately.
