Effect of ambient temperature and sodium bicarbonate supplementation on water and electrolyte balances in dry and lactating Holstein cows

Autor: Philippe Faverdin, H. Khelil-Arfa, Anne Boudon
Přispěvatelé: Physiologie, Environnement et Génétique pour l'Animal et les Systèmes d'Elevage [Rennes] (PEGASE), Institut National de la Recherche Agronomique (INRA)-AGROCAMPUS OUEST, Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro)-Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro), AGROCAMPUS OUEST-Institut National de la Recherche Agronomique (INRA)
Rok vydání: 2014
Předmět:
[SDV]Life Sciences [q-bio]
7. Clean energy
high temperature
température ambiante
Feces
chemistry.chemical_compound
Latin square
2. Zero hunger
Silage
0303 health sciences
dairy cow
water excretion
water intake
Temperature
food and beverages
04 agricultural and veterinary sciences
Water-Electrolyte Balance
Milk
vache laitière
besoin en eau
Female
alimentation animale
Bicarbonate
Sodium
Drinking
chemistry.chemical_element
bicarbonate
lactation
Total mixed ration
03 medical and health sciences
Animal science
Genetics
Animals
Dry matter
030304 developmental biology
Sodium bicarbonate
abreuvement
0402 animal and dairy science
Water
040201 dairy & animal science
Diet
modèle prédictif
Sodium Bicarbonate
chemistry
Agronomy
Volume (thermodynamics)
excrétion d'eau
Dietary Supplements
holstein
Cattle
Animal Science and Zoology
évaporation
Food Science
Zdroj: Journal of Dairy Science 4 (97), 2305-2318. (2014)
Journal of Dairy Science
Journal of Dairy Science, American Dairy Science Association, 2014, 97 (4), pp.2305-2318. ⟨10.3168/jds.2013-7079⟩
ISSN: 0022-0302
DOI: 10.3168/jds.2013-7079
Popis: The aim of this study was to quantify the effect of the interaction between 2 constant ambient temperatures [thermoneutrality (TN; 15°C) and high temperature (HT; 28°C)] and 2 levels of Na bicarbonate supplementation [calculated to provide diet Na contents of 0.20% DM (Na(-)) and 0.50% DM (Na(+))] on water partitioning in dairy cows. Treatments were compared on 4 dry and 4 mid-lactation Holstein cows according to 2 Latin squares (1 for each physiological stage) over the course of 4 periods of 15 d. Diets consisted of a total mixed ration based on maize silage. Dry cows were restricted to their protein and energy requirements, whereas lactating cows were fed ad libitum. The daily average temperature-humidity index was 59.4 for TN and 73.2 for HT. Lactating and dry cows had higher vaginal temperatures at HT than at TN, but the increase was more pronounced in lactating cows (+1.05 vs. +0.12°C for vaginal temperature, respectively). Dry matter intake (DMI) of lactating cows decreased by 2.3 kg/d at HT. Free water intake (FWI) and estimated volume of water lost to evaporation increased at HT in both lactating and dry cows; no interactions were observed between temperature and physiological stage. When expressed as a proportion of DMI, the increase in evaporation that occurred with increasing temperature was completely compensated for by an increase in FWI for both physiological stages. The urinary water excretion increased slightly at HT in lactating cows but not in dry cows, which may be related to the low chloride content of the offered diet. High Na supplementation increased DMI slightly in lactating cows, but milk yield was not affected. Sodium supplementation did not limit the decrease in DMI observed in lactating cows at HT; this observation is likely due to the high diet electrolyte balance of the offered diets. Sodium supplementation increased FWI in lactating cows and urinary flow in both physiological states. The interaction between ambient temperature and Na supplementation did not affect either water intake or water evaporation. This study demonstrates that the development of predictive models for water intake that include environmental variables could be based on mechanistic models of evaporation.
Databáze: OpenAIRE
Externí odkaz: