Effect of water deprivation on eating patterns of lactating cows fed grass and corn pellets ad lib

Physiology & Behavior
M SennW Langhans

Abstract

The present study investigated the effect of 48 h of water deprivation on eating behavior of 12 lactating cows fed grass and corn pellets ad lib. Water deprivation reduced grass and corn pellet intake significantly, with corn pellet intake decreasing earlier than grass intake. The reduction of feed intake was entirely due to a reduction of meal size for both grass and corn-pellet meals. The size of the first meal of the water deprivation period was already reduced by about 30%. Grass-meal frequency increased, whereas corn-pellet meal frequency decreased during water deprivation. Water deprivation also decreased live weight and milk yield by about 12 and 30%, respectively. All parameters returned to baseline values with rehydration. With ad lib access to feed and water, 77% of drafts occurred in relation to meals, but the number of meals clearly exceeded the number of drafts. The results demonstrate that water deprivation rapidly leads to premature meal termination. This is in line with the assumption that an enhanced prandial increase in ruminal fluid osmotality contributes to dehydration-induced hypophagia. Yet, further studies are necessary to prove this assumption and to better understand the complex relationships between ea...Continue Reading

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Citations

Jan 11, 2001·Physiology & Behavior·M S BurgosM Senn
Apr 2, 1998·Physiology & Behavior·R RossiE Scharrer
Jun 1, 1997·Zentralblatt für Veterinärmedizin. Reihe A·R RossiE Scharrer
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Aug 23, 2020·Pharmacology, Biochemistry, and Behavior·Matheus A Bezerra-KarounisJ Landeira-Fernandez
Feb 13, 2019·Physiology & Behavior·Wolfgang Langhans
May 18, 2021·Frontiers in Veterinary Science·Gabriela Schenato BicaDayane Lemos Teixeira
Aug 15, 2021·Journal of Dairy Science·Margit Bak Jensen, Mogens Vestergaard

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