Effect of two different cooling strategies on microclimate, physiological reactions and production performance of crossbred cows during summer

Karan Fries (KF) crossbred cows (24) in early lactation with good body condition (3 at 6 point scale) were randomly allotted to 2 treatments viz; loose shed with a provision for fan (Tl) or loose shed with a provision for fan with water sprinkling (TJ to compare microclimate, physiological reactions...

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Bibliographic Details
Published in:Indian journal of animal sciences 2007-12, Vol.77 (12)
Main Authors: Ghosh, C.P, Prasad, Shiv
Format: Article
Language:English
Subjects:
APTITUD LECHERA
APTITUDE LAITIERE
CONTROL AMBIENTAL
CONTROLE DU MILIEU
COOLING
COWS
ENFRIAMIENTO
ENVIRONMENTAL CONTROL
ESTRES TERMICO
HEAT STRESS
HOMEOSTASIE
HOMEOSTASIS
http://www.fao.org/aos/agrovoc#c_11488
http://www.fao.org/aos/agrovoc#c_1854
http://www.fao.org/aos/agrovoc#c_1939
http://www.fao.org/aos/agrovoc#c_24276
http://www.fao.org/aos/agrovoc#c_2595
http://www.fao.org/aos/agrovoc#c_32719
http://www.fao.org/aos/agrovoc#c_33930
http://www.fao.org/aos/agrovoc#c_4802
MICROCLIMA
MICROCLIMAT
MICROCLIMATE
MILK PERFORMANCE
PHYSIOLOGICAL REGULATION
REFROIDISSEMENT
REGULACION FISIOLOGICA
REGULATION PHYSIOLOGIQUE
STRESS THERMIQUE
VACA
VACHE
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Summary:Karan Fries (KF) crossbred cows (24) in early lactation with good body condition (3 at 6 point scale) were randomly allotted to 2 treatments viz; loose shed with a provision for fan (Tl) or loose shed with a provision for fan with water sprinkling (TJ to compare microclimate, physiological reactions and various performance parameters of the animals during summer. Shed with evaporative cooling (TJ had lower maximum and minimum temperatures than shed with fan (Tl)' Furthermore; the T2 shed had significantly lower Db and Wb temperature, THI during morning and afternoon hours but significantly higher RH% during morning and afternoon hours than that of T1 shed. The T1 cows had higher values of RR, HR, RT and ST than T2cows during morning and afternoon hours. The cows under evaporative cooling consumed significantly higher dry matter, total digestible nutrients, crude protein and their milk production was_ significantly higher than those uader fan alone. Nutrient conversion efficiency as well as returns were better in T2group of cows vis-a-vis Tl cows. Thus the shed with fans alone was not sufficient to eliminate the heat stress in high yielding cows in northern part of India and water sprinkling with provision of fans was a more effective strategy for managing high yielding crossbred cows in summer.
ISSN:0367-8318