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3. Brooding<br />
3.3. Temperature<br />
●<br />
●<br />
Concrete temperature has a big impact on early<br />
performance especially mortality, weight gain and<br />
flock uniformity.<br />
An acceptable <strong>broiler</strong> as-hatched flock uniformity<br />
has a CV of 8-10 (day old chick average uniformity<br />
CV 7.88).<br />
7 day mortality %<br />
1.40<br />
1.20<br />
1.00<br />
0.80<br />
0.60<br />
0.40<br />
0.20<br />
0.00<br />
7 Day Mortality % v Concrete Temperature<br />
Less than 28°C<br />
(82.4°F)<br />
Concrete Temperature °C (°F)<br />
Less than 28°C<br />
(82.4°F)<br />
7 day weight (g/lb)<br />
2150<br />
4.74<br />
2140<br />
4.72<br />
2130<br />
4.70<br />
2120<br />
4.67<br />
2110<br />
4.65<br />
2100<br />
4.63<br />
2090<br />
4.61<br />
2080<br />
4.59<br />
2070<br />
4.56<br />
Final Weight v Concrete Temperature<br />
Less than 28°C<br />
(82.4°F)<br />
Less than 28°C<br />
(82.4°F)<br />
7 day weight (g/lb)<br />
190<br />
0.42<br />
185<br />
0.41<br />
180<br />
0.40<br />
175<br />
0.39<br />
170<br />
0.37<br />
165<br />
0.36<br />
160<br />
0.35<br />
7 Day Weight % v Concrete Temperature<br />
Less than 28°C<br />
(82.4°F)<br />
Less than 28°C<br />
(82.4°F)<br />
Concrete Temperature °C (°F)<br />
Concrete Temperature °C (°F)
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