147 Effect of Within-pen Variation in Weaning Weight on the Growth Performance of Nursery Pigs. (7th May 2021)
- Record Type:
- Journal Article
- Title:
- 147 Effect of Within-pen Variation in Weaning Weight on the Growth Performance of Nursery Pigs. (7th May 2021)
- Main Title:
- 147 Effect of Within-pen Variation in Weaning Weight on the Growth Performance of Nursery Pigs
- Authors:
- Morris, Jenny R
Ellis, Michael
Shull, Caleb M - Abstract:
- Abstract: This study evaluated the effect of housing newly-weaned pigs in uniform versus mixed weight groups on nursery growth performance (5.9 ± 1.1 to 26.2 ± 2.9 kg BW). Pigs were assigned to a weaning weight (WW) quartile: Q1 (light; 4.2 ± 0.1 kg), Q2 (medium-light; 5.5 ± 0.1 kg), Q3 (medium-heavy; 6.3 ± 0.2 kg), and Q4 (heavy; 7.5 ± 0.1 kg). A RCBD was used (blocking factor = start date) with 5 treatments: Control (equal number of pigs from each quartile); Uniform Q1 (all pigs from Q1); Uniform Q2 (all pigs from Q2); Uniform Q3 (all pigs from Q3); Uniform Q4 (all pigs from Q4). There were 16 replicates and 3, 503 pigs, with mixed-gender pens of 44. Pen was the experimental unit; data were analyzed using PROC MIXED of SAS (fixed effect = treatment; random effect = replicate). Overall ADG and ADFI increased (P < 0.05) according to WW quartile for the Uniform treatments, with the Control being intermediate. There were no differences (P > 0.05) between treatments for Overall G:F. A contrast statement was used to compare Control to the mean of all 4 Uniform treatments. Compared to Control, the mean of the 4 Uniform treatments had similar (P > 0.05) overall ADG (0.44 vs. 0.44 kg, respectively) and ADFI (0.72 vs. 0.68 kg, respectively), but greater (P < 0.05) overall G:F (0.637 vs. 0.611, respectively). Comparison of pigs from each quartile within Control pens with the respective quartile in Uniform pens suggested no effect (P > 0.05) of weight quartile on ADG (respective meansAbstract: This study evaluated the effect of housing newly-weaned pigs in uniform versus mixed weight groups on nursery growth performance (5.9 ± 1.1 to 26.2 ± 2.9 kg BW). Pigs were assigned to a weaning weight (WW) quartile: Q1 (light; 4.2 ± 0.1 kg), Q2 (medium-light; 5.5 ± 0.1 kg), Q3 (medium-heavy; 6.3 ± 0.2 kg), and Q4 (heavy; 7.5 ± 0.1 kg). A RCBD was used (blocking factor = start date) with 5 treatments: Control (equal number of pigs from each quartile); Uniform Q1 (all pigs from Q1); Uniform Q2 (all pigs from Q2); Uniform Q3 (all pigs from Q3); Uniform Q4 (all pigs from Q4). There were 16 replicates and 3, 503 pigs, with mixed-gender pens of 44. Pen was the experimental unit; data were analyzed using PROC MIXED of SAS (fixed effect = treatment; random effect = replicate). Overall ADG and ADFI increased (P < 0.05) according to WW quartile for the Uniform treatments, with the Control being intermediate. There were no differences (P > 0.05) between treatments for Overall G:F. A contrast statement was used to compare Control to the mean of all 4 Uniform treatments. Compared to Control, the mean of the 4 Uniform treatments had similar (P > 0.05) overall ADG (0.44 vs. 0.44 kg, respectively) and ADFI (0.72 vs. 0.68 kg, respectively), but greater (P < 0.05) overall G:F (0.637 vs. 0.611, respectively). Comparison of pigs from each quartile within Control pens with the respective quartile in Uniform pens suggested no effect (P > 0.05) of weight quartile on ADG (respective means for Control vs Uniform: Q1 0.34 vs. 0.36 kg; Q2 0.39 vs. 0.40 kg; Q3 0.42 vs. 0.42 kg; Q4 0.47 vs. 0.45 kg). These results suggest that penning nursery pigs in uniform versus mixed weight groups had limited effect on growth performance. … (more)
- Is Part Of:
- Journal of animal science. Volume 99(2021)Supplement 1
- Journal:
- Journal of animal science
- Issue:
- Volume 99(2021)Supplement 1
- Issue Display:
- Volume 99, Issue 1 (2021)
- Year:
- 2021
- Volume:
- 99
- Issue:
- 1
- Issue Sort Value:
- 2021-0099-0001-0000
- Page Start:
- 135
- Page End:
- 136
- Publication Date:
- 2021-05-07
- Subjects:
- pigs -- weaning weight -- growth
Livestock -- Periodicals
Livestock
Electronic journals
Periodicals
636.005 - Journal URLs:
- https://dl.sciencesocieties.org/publications/jas/index ↗
http://www.asas.org/jas/ ↗
https://academic.oup.com/jas ↗
http://www.oxfordjournals.org/ ↗ - DOI:
- 10.1093/jas/skab054.228 ↗
- Languages:
- English
- ISSNs:
- 0021-8812
- Deposit Type:
- Legaldeposit
- View Content:
- Available online (eLD content is only available in our Reading Rooms) ↗
- Physical Locations:
- British Library DSC - BLDSS-3PM
British Library HMNTS - ELD Digital store - Ingest File:
- 16909.xml