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Lactational performance, nursing and maternal behavior of Upton-Meishan and Large White sows
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The growth of litters from 19 Upton-Meishan (UM) and 16 Large White (LW) sows was recorded from birth to weaning (25 d of age). Water and feed intake of sows were recorded. Suckling behavior was studied on days 5 and 20 of lactation. Milk yield was measured on day 22 and a milk sample was obtained the next day. Water intakes were similar (P = 0.947) for both breeds, yet UM sows consumed less feed throughout lactation (P = 0.0002). Average piglet (P < 0.05) and total litter (P < 0.001) weights were greater as of day 7 in UM compared to LW sows. Mean piglet weight on day 24 was 6.13 ± 0.16 kg for UM litters and 5.33 ± 0.33 kg for LW litters. Suckling interval was similar for UM and LW litters on day 5 (P = 0.533), but was shorter for UM litters on day 20 (41.4 ± 1.2 vs. 48.3 ± 2.8 min; P= 0.060). On day 22, daily milk yield corrected for actual suckling interval was greater (10.59 ± 0.47 vs. 8.03 ± 0.65 kg; P = 0.003) in UM sows. Milk from UM sows contained more fat (P= 0.042) and lactose (P = 0.005). In conclusion, the greater growth rate of piglets from UM sows is mainly due to a higher frequency of nursings and to greater energy content of milk. Key words: Sows, lactation, breed, Meishan, behavior, nursing
Canadian Science Publishing
Title: Lactational performance, nursing and maternal behavior of Upton-Meishan and Large White sows
Description:
The growth of litters from 19 Upton-Meishan (UM) and 16 Large White (LW) sows was recorded from birth to weaning (25 d of age).
Water and feed intake of sows were recorded.
Suckling behavior was studied on days 5 and 20 of lactation.
Milk yield was measured on day 22 and a milk sample was obtained the next day.
Water intakes were similar (P = 0.
947) for both breeds, yet UM sows consumed less feed throughout lactation (P = 0.
0002).
Average piglet (P < 0.
05) and total litter (P < 0.
001) weights were greater as of day 7 in UM compared to LW sows.
Mean piglet weight on day 24 was 6.
13 ± 0.
16 kg for UM litters and 5.
33 ± 0.
33 kg for LW litters.
Suckling interval was similar for UM and LW litters on day 5 (P = 0.
533), but was shorter for UM litters on day 20 (41.
4 ± 1.
2 vs.
48.
3 ± 2.
8 min; P= 0.
060).
On day 22, daily milk yield corrected for actual suckling interval was greater (10.
59 ± 0.
47 vs.
8.
03 ± 0.
65 kg; P = 0.
003) in UM sows.
Milk from UM sows contained more fat (P= 0.
042) and lactose (P = 0.
005).
In conclusion, the greater growth rate of piglets from UM sows is mainly due to a higher frequency of nursings and to greater energy content of milk.
Key words: Sows, lactation, breed, Meishan, behavior, nursing.
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