CAJ | 학술논문

本研究旨在探讨妊娠期母猪膘情对窝产活仔数、初生窝重、胎盘效率和断奶窝重的影响。本试验以长白母猪为对象对98头经产母猪分娩前的背膘进行测定，根据背膘厚度分为厚（21～27 mm）、适中（16～20 mm）、薄（10～15 mm）3组。同时记录母猪分娩后窝产活仔数、初生窝重、胎盘重以及21 d 仔猪断奶重。胎盘效率为初生窝重与胎盘重的比值。结果表明：背膘厚度适中组的窝产活仔数显著高于背膘厚度薄组和厚组（ P＜0．05）。背膘厚度适中组的胎盘效率和初生窝重显著高于背膘厚度厚组（P＜0．05）。各组间断奶窝重差异不显著（ P＞0．05）。由此可知，妊娠期母猪膘情适中可改善窝产活仔数和初生窝重，所以通过营养调控改善过肥过瘦的不良体况尤为重要。
본연구지재탐토임신기모저표정대와산활자수、초생와중、태반효솔화단내와중적영향。본시험이장백모저위대상대98두경산모저분면전적배표진행측정，근거배표후도분위후（21～27 mm）、괄중（16～20 mm）、박（10～15 mm）3조。동시기록모저분면후와산활자수、초생와중、태반중이급21 d 자저단내중。태반효솔위초생와중여태반중적비치。결과표명：배표후도괄중조적와산활자수현저고우배표후도박조화후조（ P＜0．05）。배표후도괄중조적태반효솔화초생와중현저고우배표후도후조（P＜0．05）。각조간단내와중차이불현저（ P＞0．05）。유차가지，임신기모저표정괄중가개선와산활자수화초생와중，소이통과영양조공개선과비과수적불량체황우위중요。
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×Land-race 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 skin-fold 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 in-creased 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 to-gether,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 reg-ulation is particularly important.