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Which of the following is a beneficial growth promoting technology for weight gain in cull cows?

  1. Vaccines

  2. Ionophores

  3. Organic fertilizers

  4. Natural remedies

The correct answer is: Ionophores

Ionophores are a type of feed additive that act as growth promoters in cattle, specifically in cull cows, by altering the fermentation process in the stomach (rumen). These compounds work by changing the microbial population in the rumen, promoting the growth of certain bacteria that are more efficient at converting feed into body mass. This leads to improved feed efficiency, meaning that the cows can gain more weight for the same amount of feed consumed. Additionally, ionophores can help reduce the production of methane gas during digestion, which can contribute to overall better feed conversion and lower greenhouse gas emissions from cattle farming. In contrast, vaccines are primarily used to prevent disease rather than to promote growth. Organic fertilizers are used to improve soil health and crop production, and while they provide nutrients to the plants consumed by the cattle, they do not directly promote weight gain in the cows themselves. Natural remedies may enhance general health but lack the scientifically proven effectiveness of ionophores in promoting growth in livestock. Thus, ionophores stand out as the specifically beneficial technology for weight gain in cull cows.