By Jamie Martin
A recent study published in Science Advances reveals that climate change significantly lowers milk production in dairy cows.
Researchers studied over 130,000 cows in Israel and found that extreme humid heat can reduce milk yield by up to 10% per day, with effects lasting beyond 10 days.
Israel was selected due to its advanced dairy system and varied climate. The study measured wet-bulb temperatures, which combine heat and humidity, showing that conditions above 26°C stress cows severely and disrupt milk production.
Even with cooling systems like fans and water spraying, only half the loss is recovered when wet-bulb temperatures reach 20°C.
The study warns that by mid-century, countries like India, Brazil, and Pakistan could see a 4% drop in milk per cow without stronger adaptation. Though cooling equipment helps and pays for itself in 18 months, not all farms can afford it.
Beyond equipment, the study urges improving animal welfare, like reducing confinement and separation stress. These practices, the authors say, make cows more vulnerable to heat.
Professor Ram Fishman noted that “the severe impacts observed [in Israel] might be even more pronounced in less equipped regions.”
The research sets a new standard by linking specific weather data to real-time milk loss, providing more accurate results than earlier studies. This could help form better climate adaptation plans.
Researchers call for global action, including new breeding, technology, and farm management strategies to protect milk production. With the rising demand for dairy, solutions are critical for food security worldwide.
Photo Credit: gettyimages-dimasobko
Categories: National