Rumen, also known as monensin, is a natural fermentation product derived from *Streptomyces griseus*. It functions as an ionophore, playing a crucial role in beef cattle production by enhancing feed efficiency. One of its main benefits is reducing the breakdown of rumen protein, which helps increase the amount of available protein and amino acids that reach the lower digestive tract. This not only improves nitrogen utilization but also reduces the amount of microbial protein entering the stomach. Additionally, Rumen influences carbohydrate metabolism by suppressing acetic acid production in the rumen while increasing propionic acid levels, which provides more energy-efficient substrates for the cattle.
The recommended dosage of Rumen varies depending on the stage of the cattle’s life cycle. During the grazing period, it should be administered at 100 mg per head per day for up to 5 days, and then increased to 200 mg per head per day after that. For the feeding and finishing periods, the safe daily dose depends on the type of feed: 150–200 mg per head per day when using concentrate feeds, and 200 mg per head per day when feeding roughage. The maximum daily intake should not exceed 360 mg per head during these stages.
Rumen can be incorporated into the daily diet of beef cattle either directly or as a premix. To prepare a premix, mix 500 grams of commercial Rumen (which contains 60 grams of active ingredient per kilogram of product) with 200 kg of corn flour, ensuring it is well blended before feeding. This mixture can be used throughout the entire growth and finishing period until slaughter. It is important to follow proper dosing guidelines to avoid toxicity and ensure the health and productivity of the animals.
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