Feeding and Reproduction in Gilts and Sows
نویسنده
چکیده
With modern lean gilts there is considerable evidence to suggest that such gilts should be fed ad libitum from the time of selection until they are bred at their second or third estrus. Pregnant gilts should not be fed high levels (in excess of 2.5 kg/day) in early gestation. For sows that have lost considerable weight (in excess of 15 kg) during lactation, high levels of feeding in early gestation will increase weight gain but will not reduce embryo survival. Under good housing and management conditions a constant level of feeding throughout gestation is preferred. Increasing feed intake during the last 10 to 14 days of gestation will increase piglet birthweights slightly but in most cases this increased birthweight is not economical nor will it increase survival rates of normal sized pigs. It is recommended to feed sows to appetite throughout lactation. After weaning, first litter gilts and sows in poor condition will benefit from ad libitum feeding but sows in normal condition will perform optimally when fed approximately 2 kg feed/day from weaning to breeding.
منابع مشابه
Effects of Various Feeding Methods for Gestating Gilts on Reproductive Performance and Growth of Their Progeny*
This study compared the effect of four different feeding methods for gestating gilts on reproductive performance and growth of their progeny. A total of 40 F1 primiparous sows (Yorkshire×Landrace) were allotted to four treatments in a completely randomized design (CRD). For treatments, gestating period of sows was divided into three trimesters (0-35 d, 36-90 d and 91-110 d) and different amount...
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Feeding n-3 long-chain polyunsaturated fatty acids (LCPUFA) to gilts or sows has shown different responses to litter growth, pre-weaning mortality and subsequent reproductive performance of the sow. Two hypotheses were tested: (1) that feeding a marine oil-based supplement rich in protected n-3 LCPUFAs to gilts in established gestation would improve the growth performance of their litters; and ...
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A total of 160 gilts were used to evaluate the effects of pen vs. crated housing systems and drop- vs. trickle-fed feeding systems on sow productivity, occurrence of lesions during farrowing and weaning, immune measures, and behavioral responses during 2 consecutive gestation periods. Of the 160 eligible gilts, 117 farrowed in parity 1, and of those, 72 farrowed in parity 2. The gilts were rand...
متن کاملBehavioral and physiological responses of primiparous sows to mixing with older, unfamiliar sows.
Pigs are mixed into new social groups at various stages of production, and this study investigated the response of gilts to mixing with older unfamiliar sows. Four groups of 6 gilts and 1 group of 5 gilts were housed in stable groups until the most recently bred female reached d 39 of gestation. Then, stable groups were split such that 15 gilts remained in their home pens (CON) and 14 gilts wer...
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تاریخ انتشار 1999