In this study, we determined the effects of fat mass in pregnant sows on litter live size, birth litter weight, placental efficiency, and weaning litter weight. A total of 98 gestational sows from Yorkshire×Landrace hybrid were grouped into high backfat thickness (21 to 27 mm), medium backfat thickness (16 to 20 mm) and low backfat thickness (10 to 15 mm), respectively, according to the measurement of back skinfold thickness before delivery. The litter live size, birth litter weight, placental weight and weaning weight at 21 d were measured after childbearing. Also, placental efficiency was calculated by the ratio of birth litter weight to placental weight. We found that litter live size in medium backfat thickness sows was significantly increased compared with that in low and high backfat thickness sows (P<0.05). Furthermore, the increase of backfat thickness in pregnant sows significantly reduced birth litter weight and placental efficiency (P<0.05). However, weaning litter weight was not significantly influenced by adipose deposition in pregnancy. Taken together, these data demonstrate that adequate fat mass during pregnancy can promote litter live size, birth litter weight and placental efficiency in sows, so improving thinner and fatter mass condition through nutritional regulation is particularly important.
YAO Jiaojiao
,
TIAN Liang
,
HU Jian
,
YAN Peishi
. Fat Mass：Effects on Reproductive Performance of Pregnant Sows[J]. Chinese Journal of Animal Nutrition, 2014
, 26(6)
: 1638
-1643
.
DOI: 10.3969/j.issn.1006-267x.2014.06.027
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