What is it about?
We show that there is an interactive effect of diet, environmental conditions, with or without fans and nebulizers, on the productive and qualitative performance of milk from Holstein cows confined in the Freestall system. The use of the cooling system led to higher dry matter intake and feed nitrogen efficiency use.
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Why is it important?
The environmental condition, linked to the temperature and relative humidity of the air, can increase the temperature index of humidity supported by the animal. This increase may interfere with the body metabolism of lactating cows, thus compromising efficiency in the use of dietary nutrients. The type of diet allied to the environmental conditions can interfere in the productive and metabolic responses of the animals.
Perspectives
We hope this article can make milk producers and scientists around the world care about the environment. Using diets that favor the improvement of nitrogen use efficiency allied to the climatic conditions of each region. Minimizing thus the environmental impacts and with lower cost of production.
Dr Fábio Prudêncio de Campos
Institute of Zootechny, IZ/APTA/SAA, Nova Odessa, SP 13380-011, Brazil
Read the Original
This page is a summary of: Productivity and physiological response of lactating Holstein cows to sugarcane supplementation and evaporative cooling under heat-stress, The Journal of Agricultural Science, November 2018, Cambridge University Press,
DOI: 10.1017/s0021859618000898.
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