Reproductive performance of heifers offered ad libitum or restricted access to feed for a one hundred forty-day period after weaning1

2009 ◽  
Vol 87 (9) ◽  
pp. 3043-3052 ◽  
Author(s):  
A. J. Roberts ◽  
T. W. Geary ◽  
E. E. Grings ◽  
R. C. Waterman ◽  
M. D. MacNeil
Keyword(s):  
Reproductive Performance ◽  
Restricted Access ◽  
Ad Libitum

The effects of nutrition on reproductive performance, lactation and carcass quality of once bred gilts

1995 ◽  
Vol 1995 ◽  
pp. 178-178
Author(s):  
A H Stewart ◽  
S A Edwards ◽  
V R Fowler
Keyword(s):  
Sugar Beet ◽  
Reproductive Performance ◽  
Feed Efficiency ◽  
Reproductive Physiology ◽  
Sugar Beet Pulp ◽  
Energy Sources ◽  
Carcass Quality ◽  
Beet Pulp ◽  
Ad Libitum

The once bred gilt system of production has a number of benefits in terms of feed efficiency and welfare, however the system relies on the production of a quality carcass and acceptable reproductive performance. Previous studies have indicated that welfare might be improved if gilts were ad-libitum fed a diet containing 60% Sugar beet pulp (Stewart et al 1993). There was a suggestion however that reproductive physiology may be put at risk using such a diet. The objective of this experiment was to identify differences in reproductive performance using two different energy sources in gestation and to manipulate nutrition during lactation to study the effect on carcass quality.

scholarly journals Effects of ad libitum or restricted access to total mixed ration with supplemental long hay on production, intake, and rumination

2018 ◽  
Vol 101 (12) ◽  
pp. 10922-10928 ◽  
Author(s):  
D. Cavallini ◽  
L.M.E. Mammi ◽  
M. Fustini ◽  
A. Palmonari ◽  
A.J. Heinrichs ◽  
...  
Keyword(s):  
Restricted Access ◽  
Total Mixed Ration ◽  
Ad Libitum

509 Late-Breaking: Effect of a Sensory Additive on Sow Reproductive Performance

2021 ◽  
Vol 99 (Supplement_3) ◽  
pp. 206-206
Author(s):  
Nathan Davis ◽  
Tsungcheng Tsia ◽  
Benjamin Bass ◽  
Gemma Tedo ◽  
Sofia Morais ◽  
...  
Keyword(s):  
Reproductive Performance ◽  
Feed Intake ◽  
Random Effect ◽  
Body Weight Change ◽  
Lactation Performance ◽  
Thickness Change ◽  
Breaking Effect ◽  
Ad Libitum ◽  
Sow Lactation ◽  
The Impact

Abstract The addition of a sensory additive to sow diets during the summer improved feed intake during lactation, and litter performance. The aim of this study was to evaluate the impact of the sensory additive on sow lactation performance during cooler temperatures. Three consecutive groups (n = 61 total) of sows were farrowed during winter (October, December and January). Sows were weighed, and back fat depth was measured, at 110 d of gestation prior to entering the lactation room, and again at weaning. The sows were sorted by parity, and then allotted by BW at d 110 to Control or 0.075% sensory additive (Luctamax® SowVive, Lucta S.A., Spain). Experimental diets were offered upon entry to the lactation room and fed through weaning. Feed disappearance was recorded every three days. Sows were fed 2.72 kg/head/day until farrowing, and then allowed to eat ad libitum from 24 hours post-farrowing until weaning. Data were analyzed using the PROC MIXED procedure of SAS as an RCBD with treatment as the fixed effect and group as a random effect. No differences were observed on sows feed intake (P > 0.4), 10th rib backfat thickness change (P = 0.632) and body weight change from d 110 of gestation to weaning (P = 0.65, Table 1). Sows fed the sensory additive lowered preweaning mortality by 4.9% (P = 0.051), and weaned an additional 1.42 piglets (P = 0.026) with similar weaning weights (P = 0.86) when compared to control. In conclusion, in the current study, lactation diets supplemented with a sensory additive improved litter performance and helped maintain sow body condition.

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.

EARLY REPRODUCTIVE CHARACTERISTICS OF LEGHORN PULLETS REARED ON LEAST-COST DIETS FORMULATED TO PROTEIN AND/OR AMINO ACID SPECIFICATIONS

1985 ◽  
Vol 65 (1) ◽  
pp. 205-210 ◽  
Author(s):  
S. LEESON ◽  
J. D. SUMMERS
Keyword(s):  
Amino Acids ◽  
Amino Acid ◽  
Reproductive Performance ◽  
Crude Protein ◽  
Elevated Protein ◽  
Synthetic Amino Acids ◽  
Acid Formulation ◽  
Amino Acid Requirements ◽  
Ad Libitum ◽  
Soybean Diet

Leghorn pullets were reared on one of four dietary programs formulated to (1) conventional least-cost, (2) least-cost to amino acid requirements with no specification for crude protein, (3) as (2) with cost of protein feedstuffs increased 40% and (4) corn-soybean meal. All diets contained 18% and 15% CP, or equivalents, for 0–6 and 6–18 wk, respectively. Diets were offered ad-libitum to 14 replicate groups of 10 caged pullets. Pullets fed the conventional least-cost and corn-soybean diets were heavier (P < 0.05) at 6 wk of age than pullets reared on either of the two diets formulated to amino acid specifications. At 12 and 18 wk of age, conventionally fed birds were heavier than pullets fed amino-acid-based diets, while all groups were heavier than birds fed the corn-soybean diet. To 28 wk of age, pullets reared on amino-acid-based diets under conditions of elevated protein prices, produced more eggs (P < 0.05) relative to pullets reared on treatments 2 and 4. Results confirmed that pullets can be reared on diets formulated without crude protein specifications, and that substantial use of synthetic amino acids is not detrimental to growth or early reproductive performance. Key words: Pullet growth, amino acid formulation

Reproductive performance, growth rate and body composition of full-fed versus feed-restricted broiler breeder hens

1991 ◽  
Vol 71 (2) ◽  
pp. 549-556 ◽  
Author(s):  
F. E. Robinson ◽  
N. A. Robinson ◽  
T. A. Scott
Keyword(s):  
Reproductive Performance ◽  
Feed Restriction ◽  
Embryo Viability ◽  
Broiler Breeder ◽  
Breeder Hens ◽  
Broiler Breeder Hens ◽  
Indian River ◽  
Prime Sequence ◽  
Ad Libitum ◽  
Ad Libitum Feeding

The effects of ad libitum versus restricted feeding during the period from 22 to 62 wk of age were examined in 60 individually-housed Indian River broiler breeder hens. Body weight of 30 ad-libitum-fed hens was approximately 700 g heavier than that of 30 restricted hens throughout most of the laying period. Mean egg output was lower in ad-libitum-fed hens (136.2 eggs) compared to restricted hens (176.6 eggs). A similar number of laying sequences (defined as consecutive days of laying) were observed in both groups of hens; however, the mean length of the prime sequence was 24.4 d for the restricted hens compared to 14.9 d for the ad-libitum-fed hens. Ad-libitum-fed hens had a higher incidence of intersequence pauses of greater than 11 d duration compared to restricted hens. Feed restriction did not improve fertility, embryo viability, or embryo production of eggs incubated for a period of 7 d. At 62 wk of age the carcasses of the restricted-fed hens contained on average 901 g of fat while the carcasses of the ad-libitum-fed hens contained 1270 g of fat. Ad libitum feeding reduced reproductive performance by reducing the length of the prime sequence and by increasing the number of long intersequence pauses. Key words: Broiler breeder hens, full-feeding, feed restriction, obesity, reproductive performance

scholarly journals Effect of restricted feeding under rearing on reproduction, body condition and blood metabolites of rabbit does selected for growth rate

2017 ◽  
Vol 25 (4) ◽  
pp. 303 ◽  
Author(s):  
C. Naturil-Alfonso ◽  
F. Marco-Jiménez ◽  
J.J. Pascual ◽  
J.S. Vicente
Keyword(s):  
Growth Rate ◽  
Body Weight ◽  
Litter Size ◽  
Body Condition ◽  
Reproductive Cycle ◽  
Reproductive Performance ◽  
Young Rabbit ◽  
Fat Thickness ◽  
Ad Libitum ◽  
Perirenal Fat

Young rabbit females selected for growth rate can have nutritional needs which may not be met by the common practice of feed restriction during rearing in commercial rabbit production. The aim of this study was to analyse the effect of two different feeding programmes: restricted and ad libitum feeding, applied in young rabbit females for one month at the end of rearing, on reproductive performance, body condition and circulating metabolic hormones and metabolites in a rabbit line selected by growth rate in 3 consecutive reproductive cycles. Thus, twenty-four 16-week-old does were randomly assigned to a group in which the daily recommended nutrient intakes were satisfied (fed restricted: 130 g/day, n=13) or a group fed to satiety (ad libitum: 235.5 g/day, n=11) during one month. Then, all does were inseminated in 3 consecutive cycles using a 42-day reproductive cycle. Measurements of does’ body weight, perirenal fat thickness and plasma leptin, non-esterified-fatty-acids (NEFA), beta-hydroxybutyrate (BOHB) and fructosamine were performed at artificial insemination (AI), parturition and weaning time in 3 consecutive cycles. Reproductive performance of does was evaluated based on fertility, litter size at parturition, prolificacy and productivity. Differences in body weight were found only in the 1<sup>st</sup> cycle, ad libitum fed females being heavier than restricted ones. Nevertheless, body weight variances disappeared in later cycles. No differences were found in perirenal fat thickness. Finally, in ad libitum fed females slight differences were found in plasma levels of NEFAs (452 vs. 258 μekv/L and 527 vs. 306 μekv/L for 1<sup>st</sup> and 2<sup>nd</sup> cycles) and BOHB (0.26 vs. 0.03 mM for 2<sup>nd</sup> cycle), but disappeared in the 3<sup>rd</sup> reproductive cycle. Fertility, prolificacy and productivity was not significantly affected by the feeding programme. Nevertheless, total litter size showed to be higher in ad libitum fed females at second parturition (8.7 vs. 5.9 kits). Therefore, the evaluated feeding programmes until first AI in females selected by growth rate had no effect on their reproductive outcomes, as the global reproductive performance was not affected.

scholarly journals PSXI-6 Effects of different feeding strategies during gestation on the reproductive performance of crossbred Landrace-Yorkshire sows

2019 ◽  
Vol 97 (Supplement_3) ◽  
pp. 388-388
Author(s):  
Yuanfei Zhou ◽  
Jian Peng
Keyword(s):  
Body Weight ◽  
Reproductive Performance ◽  
Feed Intake ◽  
North American ◽  
Backfat Thickness ◽  
Feeding Pattern ◽  
Feeding Strategies ◽  
American System ◽  
Litter Weight ◽  
Ad Libitum

Abstract This study was conducted to investigate the effects of different feeding strategies during gestation on the reproductive performance of sows. A total of 1121 American Landrace-Yorkshire (YL) crossbred sows and parity from 1 to 4 were assigned randomly to “North American System” feeding pattern or “Danish System” feeding pattern during gestation basing on the backfat thickness and body weight. Sows received the same diet and fed ad libitum during lactation. Results showed that over the entire gestation period, there was also no difference in average daily feed intake and total feed intake between two groups (P &gt; 0.05). “Danish System” group has significantly improved the backfat thickness at gestation 30 d (P &lt; 0.01). At 110 d of gestation, there was no difference of the backfat thickness between two groups (P &gt; 0.05). “Danish System” group had significantly increased the total number of born (P = 0.02) and born alive (P = 0.04). The number of total born (P = 0.04), stillborn (P = 0.05) and mummies (P = 0.02), had significantly different in between parities of sows. Mummies had significantly interaction effect (P = 0.01). No different was observed for the number of weaned pigs, litter weight at weaning, piglet weight, and weaning to oestrus interval between two groups. However, a significant increase of litter weight at weaning, piglet weight, was associated with increased parity of sow (P &lt; 0.01). The results of the present investigation showed that “Danish System” group could significantly increase the litter size and number born alive. Our findings point to the importance that the Danish system can be applied to North American genotypes.

The effects of nutrition on reproductive performance, lactation and carcass quality of once bred gilts

1995 ◽  
Vol 1995 ◽  
pp. 178-178
Author(s):  
A H Stewart ◽  
S A Edwards ◽  
V R Fowler
Keyword(s):  
Sugar Beet ◽  
Reproductive Performance ◽  
Feed Efficiency ◽  
Reproductive Physiology ◽  
Sugar Beet Pulp ◽  
Energy Sources ◽  
Carcass Quality ◽  
Beet Pulp ◽  
Ad Libitum

The once bred gilt system of production has a number of benefits in terms of feed efficiency and welfare, however the system relies on the production of a quality carcass and acceptable reproductive performance. Previous studies have indicated that welfare might be improved if gilts were ad-libitum fed a diet containing 60% Sugar beet pulp (Stewart et al 1993). There was a suggestion however that reproductive physiology may be put at risk using such a diet. The objective of this experiment was to identify differences in reproductive performance using two different energy sources in gestation and to manipulate nutrition during lactation to study the effect on carcass quality.

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