Effect of Orientation, Ventilation, Floor Space Allowance and Cooling Arrangement
temperature, relative humidity and temperature humidity
Av. daily
index was recorded (Table - 2). It was observed that
relative
79.43 b ± 0.35 80.70 a ± 0.44
6.786 *
significantly higher milk yield (9.896 ± 0.090 kg), lower
humidity (%)
air temperature (27.62 ± 0.13 0 C) and relative humidity
Av. daily THI 79.12 a ± 0.18 78.05 b ± 0.19
4.251*
(79.43 ± 0.35 %) were observed in cattle shed having good
ventilation compared to the shed with poor ventilation.
Means having different superscripts in a row differ significantly
In conformity to present findings Meenakshisundaram
(P < 0.05), *=> P < 0.05, ** => P < 0.01
et al (2009) reported that in poor type of house where
ventilation was poor relative humidity was found to be
significantly higher than that of good type of cattle house
Effect of floor space on milk yield and microclimate of
where ventilation was good. Good ventilation causes
dairy shed
minimal interference with convective and evaporative heat
The floor space provision inside cattle shed revealed
loss from the animals, thus allowing natural air movement
that it had highly significant (P < 0.01) effect on average
to carry heat and moisture away from the surface of the
daily milk yield, air temperature, relative humidity and
animals. Ventilation of shed depends on height, width and
temperature humidity index (Table 3). It was observed
slope of the roof (Bianca, 1964).
that average daily milk yield (9.736 ± 0.085 kg) was
significantly higher in the cattle shed where standard
Table 1. Effect of orientation on milk yield and microclimate
floor space of minimum 5 m 2 per cattle was maintained.
of dairy shed Parameters East-West Orientation North-South
Meenakshisundaram et al (2009) reported that in poor type
Orientation F Value
of cattle house where floor space provision was 2.61 m 2 per
East-West
North-South
cow, relative humidity was found to be significantly higher
Parameters
F Value
Orientation
Orientation
than that of good type of cattle house having floor space
Av. daily milk
9.720 a ±
9.470 b ±
of 3.84 m 2 per cow. In France, even under the temperate
9.56 *
yield (Kg)
0.093
0.085
conditions, Brouillet and Raguet (1990) suggested a floor
Av. daily air
space allowance of 6 m 2 per cow. The restriction of floor
temperature ( ° C) 28.05 a ± 0.10
7.12 *
area adversely affected the behavior of cows (Stergarrdoe
27.81 b ± 0.12
et al ., 1986).
Av. daily
relative
77.15 b ± 0.60 79.42 a ± 0.36
8.97*
Table 3: Effect of floor space on milk yield and microclimate of
humidity (%)
dairy shed Parameters Standard Floor Space Poor Floor Space
Av. daily THI
F Value
79.02 a ± 0.16
21.94 **
77.72 b ± 0.31
Good
Poor
Parameters
F Value
Ventilation
Ventilation
Means having different superscripts in a row differ significantly
(P < 0.05), *P < 0.05, **P < 0.01
Av. daily
9.736 a ±
8.184 b ±
milk yield
65.897 **
0.085
0.090
(Kg)
Table 2: Effect of ventilation on milk yield and microclimate of
Av. daily air
dairy shed
temperature
28.07 a ± 0.12 27.23 b ± 0.11
15.261 **
( ° C)
Good
Poor
Parameters
F Value
Ventilation
Ventilation
Av. daily
relative
79.88 b ± 0.37 81.09 a ± 0.43
7.681 **
Av. daily
9.896 a ±
8.445 b ±
humidity (%)
milk yield
125.727 **
0.090
0.081
(Kg)
Av. daily THI 79.49 a ± 0.20 78.43 b ± 0.17
6.294 **
Av. daily air
temperature
27.62 b ± 0.13 27.93 a ± 0.09
5.023*
Means having different superscripts in a row differ significantly
( ° C)
(P < 0.05), ** => P < 0.01
Journal of Animal Research: v.5 n.2. June 2015
233