Rate of gain and carcass quality in fattening pigs at low ambient temperatures
| Autor: | H.A. Brandsma, P.I. Haartsen, M.W.A. Verstegen, G. Mateman |
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| Rok vydání: | 1979 |
| Předmět: | |
| Zdroj: | Livestock Production Science, 6, 51-60 Livestock Production Science 6 (1979) |
| ISSN: | 0301-6226 |
| DOI: | 10.1016/0301-6226(79)90031-9 |
| Popis: | Experiments have been performed to estimate depression of gain per°C coldness in pigs fed at a constant feeding level of approximately 93 g of food per kg 0.75 per pig per day. In experiments 1 and 3, 32 and 16 animals were housed at 2°C (coldness) below thermoneutrality, and 32 and 16 animals at 6°C (coldness) below thermoneutrality, over a growth period from 60 to 100 kg. In experiments 2 and 4, 32 and 16 animals were housed at 2°C coldness, and 32 at 6°C coldness, over a growth period from 25 to 60 kg. At 100 kg in experiments 1 and 3, and at 60 kg in experiments 2 and 4, the animals were slaughtered and dissected for carcass quality. Weight-gain reduction in the cold was, respectively, 26.7 and 18.2 g/(day. °C) coldness in experiments 1 and 3, and 7.6 and 12.1 g/(day. °C) coldness in experiments 2 and 4. Food conversion increased by 0.13 per °C coldness in the range 60 to 100 kg, and by 0.04 per °C coldness in the growth period 25 to 60 kg. Lean to fat ratio was not clearly affected by low temperatures. |
| Databáze: | OpenAIRE |
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