Effects of chromium propionate supplementation on production performance, blood parameters, ruminal fermentation indices, and microbial diversity in heat-stressed Holstein dairy cows

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Supplementing chromium propionate improved milk yield and microbial diversity in heat-stressed dairy cows, suggesting beneficial effects.

Supplementation of chromium propionate helped reduce rectal temperature in heat-stressed cows.
The high-dose group showed significantly lower milk yield loss and somatic cell count compared to controls.
Both chromium propionate groups enhanced microbial abundance and optimized ruminal community structure.
An 8 mg/(d·cow) dose of chromium propionate provided the greatest improvement in production performance.

Zhang et al. (2025) studied this question.

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