EFFECTS OF THE ADIABATIC EVAPORATIVE COOLING SYSTEM IN FREE-STALL ON PHYSIOLOGICAL RESPONSES IN DAIRY COWS

被引：0

作者：

Pozzi Arcaro, Juliana Rodrigues ^{[1
]}

Arcaro, Irineu ^{[1
]}

Pozzi, Claudia Rodrigues ^{[1
]}

Matarazzo, Soraia Vanessa ^{[1
]}

Dib, Cristina Corsi ^{[1
]}

Fagundes, Helena ^{[2
]}

da Costa, Elizabeth Oliveira ^{[3
]}

机构：

[1] SAA Estado Sao Paulo, CAPTA, Inst Zootecnia, APTA, Caixa Postal 60, BR-13460000 Nova Odessa, SP, Brazil

[2] Univ Sao Paulo, FZEA, Dept Zootecnia, BR-13635900 Pirassununga, SP, Brazil

[3] Univ Sao Paulo, FMVZ, Dept Med Prevent, BR-05508270 Sao Paulo, SP, Brazil

来源：

BOLETIM DE INDUSTRIA ANIMAL | 2006年 / 63卷 / 04期

关键词：

adiabatic evaporative cooling; dairy cows; physiological parameters; animal behavior;

D O I：

暂无

中图分类号：

S8 [畜牧、动物医学、狩猎、蚕、蜂];

学科分类号：

0905 ;

摘要：

The purpose of this research was to compare the efficiency of three different schedules using an adiabatic evaporative cooling with misting system (AEC) in a free-stall and its influence on the physiological parameters on lactating cows. A total of 28 Brown Swiss and Holstein multiparous cows were random allocated in four groups. The overall experimental period was of 56 days, starting from January 20th. Treatments were: control group (without AEC); Day (AEC turned on from 7 to 19 h); Night (AEC turned on from 19 to 7 h) and 24 h (AEC turned on during 24h). The dry bulb temperature (DBT), relative humidity (RH) and black globe temperature (BGT) were measuread hourly inside and outside of facilities through a period of 24 hours. The respiratory frequency (RF), rectal temperature (RT) and skin temperature (ST) were registered twice a week at 7, 13 e 21 h. It was observed a positive linear correlation between rectal temperature and ST. The free-stall cooling used in the day group kept the temperature under the thermoneutrality range till 12 h, however from 17 h in the day group the DBT was statistically higher than control and 24 h groups.

引用

页码：209 / 215

页数：7

共 17 条

[1]

ANDERSON B. E., 1988, FISIOLOGIA ANIMAIS D, P623

[2]

Baccari Jr F, 2001, MANEJO AMBIENTAL VAC

[3]

FRAZZI E., 1997, INT LIV ENV S MINN P, V5, P907

[4]

HAHN G. L., 1997, INT LIV ENV S MINN P, V5, P125

[5]

HANSEN P. J., 1988, INT C LIV TROP FLOR, P14

[6] Physiological responses in thermal stressed Jersey cows subjected to different management strategies [J].

Keister, ZO ;

Moss, KD ;

Zhang, HM ;

Teegerstrom, T ;

Edling, RA ;

Collier, RJ ;

Ax, RL .

JOURNAL OF DAIRY SCIENCE, 2002, 85 (12) :3217-3224

[7]

MARTELLO L. S, 2002, THESIS

[8]

Matarazzo S. V., 2004, THESIS

[9]

Mota LS, 1997, THESIS

[10]

NAAS I. A., 2003, ANAIS

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