Effect of feeding level during rearing and pregnancy on gilt performance

1989 ◽  
Vol 1989 ◽  
pp. 83-83
Author(s):  
P.H. Simmins ◽  
S.A. Edwards ◽  
H.H. Spechter ◽  
J.E. Riley
Keyword(s):  
Reproductive Performance ◽  
Physiological Stress ◽  
Reproductive Efficiency ◽  
Large White ◽  
Feeding Level ◽  
Genetically Improved ◽  
Feeding Regimes ◽  
Low Levels ◽  
Management Changes ◽  
Effect Of Feeding

The modern genetically-improved female pig reaches first mating with low levels of back fat compared to the female bred in previous decades. Increasingly too, gilts have been bred at younger ages and lower weights and the effects of these management changes are unclear. It has been questioned whether the modern gilt is under greater physiological stress especially when subjected to low feeding levels, which could influence reproductive efficiency. The objectives of the trial reported here were to compare the reproductive performance of gilts given different feeding regimes during rearing and pregnancy in order to produce a range in body weight and back fat.The trial was designed as a 2 x 3 factorial experiment. Gilts from a Large White x Landrace crisscross breeding programme, blocked for genotype, were first allocated to one of two treatments from 10 to 25 weeks of age. Gilts were group housed and fed on a age-based scale rising to either 2.25 kg/d (L) or 2.70 kg/d (H). At 25 weeks of age, gilts with defects of teats or gait were discarded.

Effect of feeding regime during rearing and subsequent pregnancies on body conditions and reproductive performance of sows over the first four parities

1991 ◽  
Vol 1991 ◽  
pp. 6-6
Author(s):  
P.H. Simmins ◽  
S.A. Edwards ◽  
H.H. Spechter ◽  
J.E. Riley
Keyword(s):  
Reproductive Performance ◽  
Management Practices ◽  
Feeding Practices ◽  
Feeding Regime ◽  
Feeding Regimes ◽  
Effect Of Feeding

Greater demands have been imposed by present-day management practices on the modern dam with gilts being bred at younger ages and lower levels of back fat. This has raised questions over whether current rearing feeding practices and low pregnancy feeding regimes may have adverse influences on lifetime reproductive performance. The objectives of this experiment were to compare the reproductive performance of sows given different feeding regimes during rearing and pregnancy. Data previously reported from the experiment have shown that the weight and back fat depth of the gilt can be manipulated by feeding regime during rearing and pregnancy (Simmins et al. 1989). Sows reared on lower feed levels were more prolific in their first two litters but they also had longer farrowing intervals (Edwards et al. 1989). Further results up to the fourth parity are described here.

A note on the effect of feeding regime on the performance of sows housed in a novel group-housing system

1989 ◽  
Vol 49 (3) ◽  
pp. 523-526 ◽  
Author(s):  
J. Carol Petherick ◽  
Judith K. Blackshaw
Keyword(s):  
Adverse Effects ◽  
Reproductive Performance ◽  
Housing System ◽  
Group Housing ◽  
Feeding Regime ◽  
Feeding Regimes ◽  
Ad Libitum ◽  
Short Time ◽  
Effect Of Feeding ◽  
Food Trough

The effects on sow reproductive performance of three feeding regimes (ration (R), ad libitum (A) and ration + straw (R + S)), in conjunction with partial barriers placed along the food trough, were investigated. Three groups of four sows were put on the regimes, in a group-housing system, over three consecutive gestations. Each trial lasted 13 days and took place during the first half of the gestation period. Sows on A ate about three times the amount of food that was allocated to them on R and R + S (2 kg per sow per day). Feeding regime did not affect any of the measures of reproductive performance (numbers of piglets liveborn, stillborn, weaned, birth and weaning weights). Sows of parity 7 and over had significantly fewer liveborn and more stillborn piglets compared with parities 2 to 6 (P < 0·05). It is probable that no adverse effects of the feeding regimes were found due to the short time that the sows were on them and because multiparous animals were used. It is suggested that the welfare of ration-fed sows, whose appetite is not satiated, is jeopardized and that this problem may be solved by the provision of fibrous foodstuffs.

Effect of feeding level during rearing and mating strategy on performance of Swedish Yorkshire sows. 2. Reproductive performance, food intake, backfat changes and culling rate during the first two parities

1999 ◽  
Vol 68 (3) ◽  
pp. 365-377 ◽  
Author(s):  
Y. Le Cozier ◽  
E. Ringmar-Cederberg ◽  
L. Rydhmer ◽  
N. Lundeheim ◽  
J. Y. Dourmad ◽  
...  
Keyword(s):  
Food Intake ◽  
Food Consumption ◽  
Reproductive Performance ◽  
Live Weight ◽  
Mating Strategy ◽  
Factorial Experiment ◽  
Backfat Thickness ◽  
Feeding Level ◽  
Ad Libitum ◽  
Effect Of Feeding

AbstractA 2 x 2 factorial experiment was designed in order to study the effects of feeding level during rearing and of mating policy on the reproductive performance and food intake of first- and second-litter sows. Gilts were offered food during rearing eitherad libitum(AL) or at 0·8 of the AL level (R) and served either at first (E1) or third (E3) detected oestrus. A total of 160 out of the 243 animals that started the experiment were culled by the end of the second lactation, with significantly more R than AL animals (71 and 60%, respectively). During the first pregnancy, the R sows gained more live weight (LW) and backfat thickness (BF) than their AL contemporaries (+5 kg and +1.2 mm, respectively) and lost less BF during the first lactation (1.2 mm less). At weaning, no difference remained in LW or BF between AL and R sows (174 kg LW on average). The E3 females gained less LW during both pregnancies compared with those on the E1 treatment, but they remained heavier until the second weaning (208 kg, on average). During the first lactation, R consumed more food during the weeks 2 and 3 (by 0·5 kg/day, on average) than those reared previously on the AL regime, and no difference was observed between E3 and E1 females. No difference in food consumption was noted during parity two. However, when measured over the first two parities, lean animals consumed more food than fat animals. The size and the weight of the litter at birth or at weaning were not influenced by the treatment prior to service. The weaning-to-oestrus interval was longer during parity one than during parity two (5·7 and 5·0 days, respectively;P< 0·01) but it was not affected by feeding or mating treatment.

The effect of increasing feed intake for one day only during the oestrus period on the reproductive performance of sows

1971 ◽  
Vol 13 (4) ◽  
pp. 669-675 ◽  
Author(s):  
P. H. Brooks ◽  
D. J. A. Cole
Keyword(s):  
Reproductive Performance ◽  
Feed Intake ◽  
Ovulation Rate ◽  
Control Group ◽  
Large White ◽  
Embryo Mortality ◽  
The Third ◽  
Feeding Regimes ◽  
Embryo Number

SUMMARYTwo groups of 24 Landrace × Large White gilts were allocated at puberty to two feeding regimes during oestrus. The control group received 1·8 kg food/day throughout the oestrus period, while the flushed group had an additional 1·8 kg immediately after mating on the first day of oestrus. The treatments were imposed at the first post-puberal heat (second heat) and at the post-weaning oestrus in the second and third parities. The sows remained on the same treatment throughout the experiment. Litter performance was measured in the first two parities. The sows were slaughtered on day 25 of their third gestation to provide data on ovulation rate and embryo mortality. Increasing feed intake to 3·6 kg on the day of mating did not significantly affect the number of piglets born, number born live, or mean piglet weight, in either the first or second parity. In the third parity, ovulation rate, embryo number at 25 days of gestation and embryo mortality were unaffected by treatment.

scholarly journals Does Ad Libitum Feeding during the Peri-Partum Improve the Sow Feed Intake and Performances?

Animals ◽  
2019 ◽  
Vol 9 (12) ◽  
pp. 1078
Author(s):  
Laura Martí ◽  
María Ángeles Latorre ◽  
Javier Álvarez-Rodríguez
Keyword(s):  
Body Condition ◽  
Reproductive Performance ◽  
Feed Intake ◽  
Post Partum ◽  
Feeding Strategies ◽  
Weaned Piglets ◽  
Large White ◽  
Feeding Level ◽  
Ad Libitum ◽  
Ad Libitum Feeding

This study hypothesized that the ad libitum feeding of sows during the peri-partum may increase the neonatal survival of the piglets and the post-partum recovery of the sow. The aim of the study was to evaluate the effects of two peri-partum feeding strategies (ad libitum and stepped from day 110 of gestation to day 5 post-partum) on the feed intake, the reproductive performance of sows, as well as the survival of their piglets. A total of 90 Landrace x Large-White dams sired by Duroc were used. The sows were randomly assigned to feeding treatments by balancing body condition and parity between groups. The feed intake of the sows in the peri-partum was lower in the stepped than in the ad libitum strategy. The increase of the feeding level in the ad libitum sows was not counterbalanced by higher number of weaned piglets or shorter weaned to oestrus interval.

scholarly journals Effect of the feeding level during rearing on performance of Large White gilts. Part 1: growth, reproductive performance and feed intake during the first lactation

1998 ◽  
Vol 38 (4) ◽  
pp. 363-375 ◽  
Author(s):  
Yannick Le Cozler ◽  
Chrystèle David ◽  
Valérie Beaumal ◽  
Jean-Claude Hulin ◽  
Maria Neil ◽  
...  
Keyword(s):  
Reproductive Performance ◽  
Feed Intake ◽  
Large White ◽  
Feeding Level

The effect of dietary Intake and litter size on the productivity of first-litter sows

1989 ◽  
Vol 1989 ◽  
pp. 94-94 ◽  
Author(s):  
B.P. Mullan ◽  
W.H. Close
Keyword(s):  
Milk Production ◽  
Litter Size ◽  
Reproductive Performance ◽  
Feed Intake ◽  
Present Experiment ◽  
Reproductive Function ◽  
Nutrient Metabolism ◽  
Large White ◽  
Feeding Level ◽  
Body Reserves

The partition of nutrients during lactation, In particular the extent to which body reserves are utilised to support milk production, is important in determining the reproductive performance of sows. For example, if the mobilisation of body reserves by young sows during lactation is excessive then the Interval between weaning and re-mating may be extended. The aim of this present experiment was to manipulate the use of body reserves by sows during their first lactation by altering both feed Intake and suckling intensity (litter size) in an attempt to investigate how the dynamics of nutrient metabolism during lactation may influence reproductive function.In a 2 X 2 factorial experiment, 28 Landrace x Large White gilts were fed a diet containing 12.5 MJ DE and 156 g CP per kg either to appetite (H) or 3.0 kg/day (L) with litter size adjusted to either 6 (6) or 12 (12) piglets at each feeding level for a 21-day lactation..

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