Major feed digestion in ruminants takes place in the rumen, with the aid of rumen micro-flora (bacteria, protozoa and fungi).

Growth of these micro-organisms requires a balanced feed ration (could be both concentrates and forage). These micro-organisms regulate fermentation process in the rumen.

Bacteria regulate the level of methane, carbon-dioxide and hydrogen, resulting in the influence of the rumen pH. Rumen pH influences microbial population and level of volatile fatty acids (acetic, propionic, butyric, isobutyric, valeric, isovaleric, and traces of various other acids).

Acetates are essential in the synthesis of milk fats. Propionate is used in milk sugar synthesis. Milk sugars influence the milk density (lactometer reading; a platform test).

Therefore, milk compositions checked by milk processors are influenced by the feeds the cows are given. On the other hand, before you conclude that the acidity of the milk is because of the feeding, remember handling of the harvested milk is also key in high quality milk production.

The sanitary procedures applied to equipment and the udder and storage and time taken for milk to reach the collection centre or the cooperative all matter. Milk will only maintain its high quality for two hours after milking without refrigeration, thereafter, exponential microbial multiplication sets in.

These micro-organisms use milk sugar, lactose as a substrate. Lactic acid, which lowers the pH of the milk is the product of this process.

Such milk is rejected by milk processors because it cannot withstand the high heat treatments, instead it clots. Alcohol (68-72 per cent) is used in alcohol test to check if the milk protein is stable.

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Poor quality milk will clot on this test and will be rejected. The solution here is to maintain high levels of hygiene.

CREDIT Godfrey Were Juma,
Department of Dairy, Food Science and Technology, Egerton University.

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https://i1.wp.com/farmerstrend.co.ke/wp-content/uploads/2020/07/MILK-ACIDITY.jpg?fit=640%2C425&ssl=1https://i1.wp.com/farmerstrend.co.ke/wp-content/uploads/2020/07/MILK-ACIDITY.jpg?resize=150%2C150&ssl=1#FarmersTrend#TrendingDairy FarmingLivestockMILK ACIDITYMajor feed digestion in ruminants takes place in the rumen, with the aid of rumen micro-flora (bacteria, protozoa and fungi). Growth of these micro-organisms requires a balanced feed ration (could be both concentrates and forage). These micro-organisms regulate fermentation process in the rumen.
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Bacteria regulate the level of methane, carbon-dioxide and...
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