168 Effects of Increasing Dietary Standardized Ileal Digestible Lysine Levels on Growth Performance of 12- to 26-kg Pigs Sired by High Index Boars

2021 ◽  
Vol 99 (Supplement_1) ◽  
pp. 60-61
Author(s):  
Carine M Vier ◽  
Ning Lu ◽  
Gustavo Silva ◽  
Luis E Zaragoza ◽  
Brandon Knopf ◽  
...  
Keyword(s):  
Growth Performance ◽  
Average Daily Gain ◽  
High Index ◽  
Feed Ratio ◽  
Experimental Unit ◽  
Linear Quadratic ◽  
Nursery Pigs ◽  
Best Fitting ◽  
Competing Models ◽  
Mixed Gender

Abstract Our objective was to determine the effects of increasing dietary standardized ileal digestible (SID) lysine (Lys) on the growth performance of late nursery pigs. A total of 1,125 pigs (PIC 337×Camborough, initially 12.0±0.66 kg) were used in a 21-d study. The pigs used in the study were sired by boars ranked in the top 15% of a selected PIC elite boar stud based on index. Pens of pigs were blocked by body weight and randomly allotted to 1 of 5 treatments containing 0.95, 1.10, 1.20, 1.35, and 1.50% of SID Lys. Diets were corn-soybean meal-based and contained 2,480 Kcal of NE/kg. Treatments were achieved with increasing feed-grade amino acids. There were 9 mixed gender pens per treatment and 25 pigs per pen. Data were analyzed using generalized linear and nonlinear mixed models with pen as the experimental unit. Competing models included linear, quadratic polynomial (QP), broken-line linear (BLL), and broken-line quadratic (BLQ). Increasing SID Lys concentration improved average daily gain (ADG, linear, P < 0.001) and gain to feed ratio (G:F, quadratic, P = 0.011). The best-fitting models for ADG were QP and BLL. The QP model estimated the maximum ADG at 1.43% (95% CI: 1.12 to >1.50%), with 99% of maximum ADG achieved at 1.27%. The BLL plateau was estimated at 1.31% (95%CI: 1.06 to >1.50%). The best-fitting models for G:F were QP, BLL, and BLQ. The QP model estimated the maximum G:F at 1.48% (95%CI: 1.23 to >1.50%), with 99% of maximum G:F achieved at 1.24%. The BLL plateau was estimated at 1.30% (95% CI: 1.18 to 1.41%), whereas the BLQ plateau was estimated at 1.36% (95%CI: 1.14 to >1.50%). In conclusion, the estimated optimum SID Lys concentration for 12- to 26-kg pigs sired by high index boars ranged from 1.30 to 1.48%, depending on the response criteria and statistical model.

215 Effects of Increasing Dietary Standardized Ileal Digestible Lysine Levels on Growth Performance of 39- to 119-kg Pigs Sired by High Index Boars

2021 ◽  
Vol 99 (Supplement_1) ◽  
pp. 81-82
Author(s):  
Ning Lu ◽  
Carine M Vier ◽  
Gustavo Silva ◽  
Luis E Zaragoza ◽  
Brandon Knopf ◽  
...  
Keyword(s):  
Body Weight ◽  
Growth Performance ◽  
Average Daily Gain ◽  
High Index ◽  
Feed Ratio ◽  
Experimental Unit ◽  
Linear Quadratic ◽  
Final Body Weight ◽  
Best Fitting ◽  
Competing Models

Abstract Our objective was to determine the effects of increasing dietary standardized ileal digestible (SID) lysine (Lys) on the growth performance of grow-finish pigs. A total of 1,120 pigs (PIC 337×Camborough, initially 39.0±0.82 kg) were used in a 77-d study. Pigs used in the study were sired by boars ranked in the top 15% of a selected PIC elite boar stud based on index. Pens of pigs were blocked by body weight and randomly allotted to 1 of 5 treatments, which consisted of 85, 95, 105, 115, and 125% of the PIC2016 SID Lys recommendations within each phase. Diets were corn-soybean meal-based and formulated to be iso-caloric. Treatments were achieved with increasing feed-grade amino acids. There were 9 mixed-gender pens per treatment and 24 or 25 pigs per pen. Data were analyzed using generalized linear and nonlinear mixed models with pen as the experimental unit. Competing models included linear, quadratic polynomial (QP), broken-line linear (BLL), and broken-line quadratic (BLQ). Increasing dietary SID Lys from 85 to 125% marginally improved overall average daily gain (ADG, quadratic, P = 0.056), gain to feed ratio (G:F, quadratic, P = 0.062), and final body weight (linear, P = 0.075). There was no evidence for treatment effects on mortality and removals (P > 0.10). The best-fitting models for ADG were QP and BLL. The QP model estimated the maximum ADG at 110.6% (95% CI: 93 to >125%), with 99% of maximum ADG achieved at 97.4%. The BLL plateau was estimated at 105.0% (95% CI: 74 to 136%). The best-fitting model for G:F was QP, estimating the maximum G:F at 107.8% (95% CI: 92 to >125%). In conclusion, the estimated optimum overall SID Lys for 39- to 119-kg pigs sired by high index boars ranged from 105.0 to 110.6% of PIC2016 SID Lys recommendation within each phase, depending on the response criteria and statistical model.

scholarly journals Evaluation of a novel threonine source for nursery pig diets

2020 ◽  
Vol 4 (4) ◽  
Author(s):  
Dalton Humphrey ◽  
Spenser Becker ◽  
Jason Lee ◽  
Keith Haydon ◽  
Laura Greiner
Keyword(s):  
Repeated Measures ◽  
Fixed Effects ◽  
Average Daily Gain ◽  
Covariance Structure ◽  
Treatment Phase ◽  
Positive Control ◽  
Negative Control ◽  
Feed Ratio ◽  
Experimental Unit ◽  
Nursery Pigs

Abstract Four hundred and eighty (PIC 337 X 1050, PIC Genus, Hendersonville, TN) pigs were used to evaluate a novel threonine source (ThrPro, CJ America Bio, Fort Dodge, IA) for nursery pigs from approximately 7 to 20 kg body weight (BW). After weaning, pigs were sorted by sex and fed a common diet for 1 wk. Upon completion of the first week, pigs were sorted into randomized complete blocks, equalized by weight, within 16 replications. Pigs were allocated to one of three dietary treatments: positive control (POS)—standard ileal digestible threonine-to-lysine ratio (SID; Thr:Lys) 0.60, negative control (NEG)—SID Thr:Lys ≤0.46, and alternative Thr source (TEST)—SID Thr:Lys 0.60. The alternative Thr source included fermentative biomass and was assumed to contain 75% Thr and a digestibility coefficient of 100% based on the manufacturer’s specifications. All other nutrients met or exceeded the NRC recommendations. Growth and intake data were analyzed as repeated measures with a compound symmetry covariance structure using the MIXED procedure in SAS 9.4 (SAS Institute Inc., Cary, NC) with pen as the experimental unit. Treatment, phase, the interaction between treatment and phase, and block were included as fixed effects in the model. Differences in total removals were tested using Fisher’s Exact Test of PROC FREQ. Results were considered significant at P ≤ 0.05 and considered a trend at P > 0.05 and P ≤ 0.10. During the first 14 d, pigs fed TEST had decreased gain-to-feed ratio (G:F; 0.77 vs. 0.80, P = 0.022) compared to POS and increased G:F (0.77 vs. 0.73, P < 0.001) compared to NEG. Over days 14–28, pigs fed TEST had similar G:F (0.71 vs. 0.70, P = 0.112) compared to POS and increased G:F (0.71 vs. 0.63, P < 0.001) compared to NEG. Overall (days 0–28), pigs fed TEST had similar average daily gain (ADG; 0.47 vs. 0.47 kg/d, P = 0.982) and G:F (0.76 vs. 0.74, P = 0.395) compared to POS and increased ADG (0.47 vs. 0.43 kg/d, P < 0.001) and G:F (0.76 vs. 0.67, P < 0.001) compared to NEG. The average daily feed intake was not significantly different across treatments for the entirety of the study. In conclusion, the replacement of crystalline L-Thr with a novel Thr source resulted in similar growth performance in nursery pigs from approximately 7 to 20 kg.

scholarly journals Evaluation of an active live yeast (Levucell Saccharomyces cerevisiae, CNCM l-1077) on receiving and backgrounding period growth performance and efficiency of dietary net energy utilization in low health risk beef steers1

2020 ◽  
Vol 4 (3) ◽  
Author(s):  
Zachary K Smith ◽  
Kip Karges ◽  
Angel Aguilar
Keyword(s):  
Health Risk ◽  
Growth Performance ◽  
Block Design ◽  
Average Daily Gain ◽  
Energy Utilization ◽  
Feed Ratio ◽  
Experimental Unit ◽  
Net Energy ◽  
Respiratory Pathogens ◽  
Live Yeast

Abstract The objective of this experiment was to evaluate the influence of an active live yeast direct-fed microbial (DFM) product on receiving and backgrounding period growth performance and efficiency of dietary net energy (NE) utilization in low health risk beef steers. Maine-Anjou × Angus steers (n = 199; body weight [BW] = 252 ± 32.1 kg) were received from two sources at the Ruminant Nutrition Center in Brookings, SD, in November 2019 and used in a 77-d feedlot receiving and backgrounding experiment. Steers were provided access to long-stem hay and ad libitum water upon arrival. Steers were weighed, vaccinated for respiratory pathogens (source 2 only): infectious bovine rhinotracheitis, bovine viral diarrhea types 1 and 2, parainfluenza-3 virus, and bovine respiratory syncytial virus (Bovi-Shield Gold 5, Zoetis, Parsippany, NJ) vaccinated for clostridial species (Ultrabac 7/Somubac, Zoetis) and pour-on moxidectin (Cydectin, Bayer, Shawnee Mission, KS). Steers (n = 176 steers; initial unshrunk BW = 235 ± 27.6 kg) were allotted to pens (n = 20 pens; 10 pens per treatment; eight or nine steers per pen). Diets were based upon corn silage, dry-rolled corn, and dried distillers grains; dietary treatments were 1) no DFM (CON) and 2) DFM (Levucell SC, Advantage Titan, CNCM l-1077), fed at 10 g/steer/d providing 8 × 109 CFU of active live yeast to each steer daily (DFM). Initial BW was the average of day −1 and day 1 BW (n = 176 steers; initial BW = 253 ± 27.6 kg). On day 21, steers received a 200-mg progesterone and 20-mg estradiol benzoate implant. Data were analyzed from day 1 to 47 (receiving period), day 48 to 77, and from day 1 to 77 as a randomized complete block design; pen served as the experimental unit for all analyses. On day 47 of the experiment, DFM had greater BW (P = 0.01) by 0.9% and average daily gain (ADG; P = 0.01) by 4.2% and gain-to-feed ratio (G:F) tended (P = 0.13) to be 2.8% greater. Day 77 BW did not differ (P = 0.60), cumulative (days 1–77): ADG (P = 0.47), dry matter intake (P = 0.66), and G:F (P = 0.56) were similar. Yeast inclusion had no appreciable influence on performance-based dietary NE utilization or the ratio of observed/expected dietary NE (P ≥ 0.59). In low health risk steers, DFM improved performance during the feedlot receiving period. However, no improvements for DFM were detected for cumulative performance from day 1 to 77. The confirmation of yeast counts indicated the CFU to be above the expected level at the start of the trial but was found below expected level at the end of the trial. This may explain differences during the initial 47 d compared to cumulative growth performance results.

147 Effect of Within-pen Variation in Weaning Weight on the Growth Performance of Nursery Pigs

2021 ◽  
Vol 99 (Supplement_1) ◽  
pp. 135-136
Author(s):  
Jenny R Morris ◽  
Michael Ellis ◽  
Caleb M Shull
Keyword(s):  
Growth Performance ◽  
Random Effect ◽  
Experimental Unit ◽  
Limited Effect ◽  
Weaning Weight ◽  
Nursery Pigs ◽  
Start Date ◽  
The Mean ◽  
Mixed Gender ◽  
Weight Groups

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 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.

scholarly journals Adverse effects on growth performance and bone development in nursery pigs fed diets marginally deficient in phosphorus with increasing calcium to available phosphorus ratios

2020 ◽  
Vol 98 (10) ◽  
Author(s):  
Spenser L Becker ◽  
Stacie A Gould ◽  
Amy L Petry ◽  
Leah M Kellesvig ◽  
John F Patience
Keyword(s):  
Growth Performance ◽  
Mixed Model ◽  
Linear Mixed Model ◽  
Bone Development ◽  
Average Daily Gain ◽  
Experimental Period ◽  
Feed Ratio ◽  
Available Phosphorus ◽  
Nursery Pigs ◽  
The Impact

Abstract The objective of this experiment was to evaluate the growth performance and bone mineral content (BMC) of nursery pigs in response to increasing total calcium (Ca) to available phosphorus (aP) ratios in diets containing phytase (250 FTU/kg; Natuphos E, BASF, Florham Park, NJ). A total of 480 nursery pigs (body weight (BW) = 5.7 ± 0.6 kg) with 10 pigs per pen and 7 pens per treatment (6 pens fed 2.75:1 diet) were allotted to seven treatments consisting of increasing ratios of calcium to available phosphorus (Ca:aP): 1.25, 1.50, 1.75, 2.00, 2.25, 2.50, and 2.75. From day −7 to 0, pigs were fed a common diet. They were then fed the treatment diets during two experimental phases from day 1 to 14 and 15 to 28, respectively. Available P was formulated to 0.33% and 0.27% (approximately 90% of requirement) in dietary phases 1 and 2, respectively. BW, average daily gain (ADG), average daily feed intake (ADFI), and gain-to-feed ratio (G:F) were determined. BMC of the femur was measured on day 28 on one pig per pen using dual x-ray absorptiometry. Data were analyzed as a linear mixed model using PROC MIXED (SAS, 9.3). Orthogonal polynomial contrasts were used to determine the linear and quadratic effects of increasing the Ca:aP. Over the 28-d experimental period, increasing Ca:aP resulted in a linear decrease in ADG (353, 338, 328, 304, 317, 291, and 280 g/d; P < 0.01), ADFI (539, 528, 528, 500, 533, 512, and 489 g/d; P < 0.05), and G:F (0.68, 0.66, 0.64, 0.62, 0.61, 0.59, and 0.58; P < 0.01). Increasing Ca:aP also resulted in decreased BW on days 14 and 28 (P < 0.01). The BMC of the femur decreased with increasing Ca:aP (6.2, 6.3, 5.7, 5.9, 5.5, 5.6, and 5.3 g; P < 0.05). Regression analysis explained the impact of Ca:aP as follows on ADG (ADG [g/d] = 339 − 36x; r2 = 0.81), G:F (G:F = 0.61 – 0.03x; r2 = 0.72), and BMC (BMC [g] = 6.4 – 0.27x; r2 = 0.43), where x is the Ca:aP. In conclusion, all outcomes indicated that any level of calcium above the minimum used in this experiment impaired growth performance and skeletal development. Further research using even lower levels of dietary Ca is warranted.

scholarly journals Effects of increasing dietary inclusion of camelina cake on growth performance of growing-finishing pigs

2021 ◽  
Vol 5 (3) ◽  
Author(s):  
A M Hilbrands ◽  
L J Johnston ◽  
R B Cox ◽  
F Forcella ◽  
R Gesch ◽  
...  
Keyword(s):  
Growth Performance ◽  
Soybean Meal ◽  
Repeated Measures ◽  
Control Diet ◽  
Average Daily Gain ◽  
Carcass Traits ◽  
Dietary Treatment ◽  
Feed Ratio ◽  
Experimental Unit ◽  
Finishing Pigs

Abstract The objective of this experiment was to determine the dietary inclusion rate of camelina cake (CC) that would support the growth performance of growing-finishing pigs similar to that of a corn-soybean meal-based diet. Pigs (n = 192; BW = 35.2 kg; Duroc x (Yorkshire x Landrace)), balanced for sex and initial weight, were assigned to pens (8 pigs/pen) and pens were assigned randomly to one of four dietary treatments (6 pens/treatment). Treatments consisted of a non GMO corn-soybean meal control diet (CON), or CON containing 5% (5CC), 10% (10CC), or 15% (15CC) camelina cake. Feed disappearance on a pen basis and individual body weights of pigs were recorded every other week to calculate average daily gain (ADG), average daily feed intake (ADFI), and gain to feed ratio (G:F) on a pen basis. Prior to harvest, real-time ultrasonic measurements of back fat depth and loin eye area were collected on all live pigs. Pigs were harvested as a single group at about 23 weeks of age at a commercial abattoir. Data were analyzed using Proc Glimmix with dietary treatment as a fixed effect and pen serving as the experimental unit. Growth performance data collected over time were analyzed using repeated measures within the Proc Glimmix procedure. Overall, pigs fed CON exhibited similar ADG to those consuming 5CC and higher ADG than pigs consuming 10CC and 15CC diets (1.10 kg vs. 1.05 kg for 10CC and 1.02 kg for 15CC; P < 0.05 for both mean comparisons). Pigs fed CON consumed more feed than pigs fed any of the CC diets (ADFI = 2.66 kg for CON vs. 2.46 kg for 5CC, 2.46 kg for 10CC and 2.47 kg for 15CC; P < 0.05 for all). These differences resulted in heavier (P < 0.05) CON-fed pigs at marketing than 10CC or 15CC-fed pigs. There were no differences in any carcass traits analyzed. From these data, we conclude that feeding up to 5% CC in corn-soybean meal-based diets did not negatively influence growth performance, or carcass traits of growing-finishing pigs.

515 Late-Breaking: Effects of Dietary Phytase with or without Multi-carbohydrase Supplementation on Growth Performance, Nutrient Digestibility, and Bone Traits in Nursery Pigs

2021 ◽  
Vol 99 (Supplement_3) ◽  
pp. 207-208
Author(s):  
Olumide E Adeshakin ◽  
Bonjin Koo ◽  
Robert Patterson ◽  
Martin Nyachoti
Keyword(s):  
Body Weight ◽  
Growth Performance ◽  
Block Design ◽  
Average Daily Gain ◽  
Metacarpal Bone ◽  
Nutrient Digestibility ◽  
Experimental Unit ◽  
Deficient Diet ◽  
Nursery Pigs ◽  
Metacarpal Bones

Abstract The aim was to determine the effects of supplementing increasing doses of phytase (PHY) alone or in combination with multi-carbohydrase (MC) blend to a P-deficient diet for nursery pigs on growth performance, nutrient digestibility, and metacarpal bone characteristics. A total of 192 weaned pigs (7.7 ± 0.05 kg BW) were allotted to 1 of 8 dietary treatments each with 8 replicates in a randomised complete block design based on initial body weight. Diets consisted of a P-deficient negative control (NC), NC + 250 FTU/kg (TRT1), NC + 500 FTU/kg (TRT2), NC + 1,000 FTU/kg (TRT3), NC + 0.2g/kg MC (TRT4), TRT4 + 250 FTU/kg (TRT5), TRT4 + 500 FTU/kg (TRT6), and TRT4 + 1,000 FTU/kg (TRT7). Fecal samples (d 18, 19, and 20) and metacarpal bones (d21) were collected to determine apparent total tract digestibility (ATTD) of energy and nutrients and bone mineralization, respectively. Data were analyzed using the MIXED procedure of SAS with orthogonal polynomial contrast statements with a pen as an experimental unit for growth performance and digestibility and 1 pig per pen for bone traits. During week 2, MC supplementation tended to increase (P = 0.05) body weight whereas by week 3, increasing doses of PHY linearly (P < 0.05) increased average daily gain (ADG). Overall, PHY supplementation had a quadratic effect (P < 0.05) increasing ADG. However, there was an interaction (P < 0.05) whereby PHY and MC in combination acted synergistically to increase percentage of ash and P ATTD. Phytase had linear (P < 0.05) and quadratic (P < 0.05) by increasing fat-free dry weight, ash content, and P in metacarpal bone. In conclusion, increasing levels of PHY quadratically improved growth performance, nutrient digestibility, and bone traits of pigs fed a P-deficient diet.

scholarly journals Evaluation of two-stage weaning and trace mineral injection on receiving cattle growth performance and behavior

2018 ◽  
Vol 3 (1) ◽  
pp. 155-163
Author(s):  
Jordan C Rauch ◽  
Rebecca S Stokes ◽  
Daniel W Shike
Keyword(s):  
Growth Performance ◽  
Average Daily Gain ◽  
Feed Ratio ◽  
Experimental Unit ◽  
Saline Injection ◽  
Trace Mineral ◽  
Two Stage ◽  
Growing Period ◽  
And Behavior ◽  
Daily Gain

Abstract The objective was to evaluate the effects of two-stage weaning and injectable trace mineral (ITM) on receiving cattle growth performance and behavior. Angus and Simmental × Angus steers (n = 136; body weight [BW] = 200 ± 26 kg) were utilized in a 2 × 2 factorial design. Calves were blocked by source, and assigned to one of four treatments: 1) two-stage weaning and ITM (2MM), 2) two-stage weaning and saline injection (2SAL), 3) abrupt weaning and ITM (AbtMM), or 4) abrupt weaning and saline injection (AbtSAL). On d−6, calves were weighed, plastic calf weaner devices (used to prevent calf from nursing) were inserted in two-stage weaned calves, and ITM or saline injections (1 mL/45.4 kg BW) were administered. On day 0, plastic calf weaner devices were removed, and calves were weighed and shipped 272 km to Urbana, IL. Steer behavior was observed the 2 d following separation from dam. Receiving period was day 0 to 42 and growing period was day 42 to 124. Data were analyzed using the MIXED procedure of SAS and pen (six per treatment) was the experimental unit. Abruptly weaned calves had greater (P < 0.01) preweaning average daily gain (ADG) than two-stage weaned calves. Treatment did not affect (P ≥ 0.16) ADG during the receiving or growing period; however, calves that received ITM tended (P 0.06) to have greater ADG from day 0 to 124. During the receiving period, abruptly weaned calves tended (P = 0.08) to eat more than two-stage calves and ITM calves ate more (P = 0.03) than calves that received saline. There was a weaning strategy × ITM interaction (P < 0.01) for dry matter intake (DMI) from day 0 to 124; 2MM calves ate more (P < 0.01) than 2SAL, but DMI was not different (P = 0.58) between AbtMM and AbtSAL calves. There was a weaning strategy × ITM interaction (P < 0.01) for gain-to-feed ratio (G:F) from day 0 to 124; 2SAL calves had greater (P = 0.05) G:F than AbtSAL, with 2MM and AbtMM calves being intermediate and not different (P = 0.38) than each other. Two-stage weaning decreased (P ≤ 0.02) the percentage of calves walking, standing, and vocalizing, and increased (P ≤ 0.02) the percentage of calves lying and eating following separation from dam. Two-stage weaning decreased preweaning ADG and behavioral signs of stress at feedlot arrival, but had no effect on overall growth. In addition, ITM had no effect on calf BW or behavior, but increased overall DMI in two-stage weaned calves compared to abruptly weaned calves and tended to increase overall ADG regardless of weaning strategy.

scholarly journals 267 Determining the effects of diet complexity and body weight categories on growth performance of nursery pigs

2020 ◽  
Vol 98 (Supplement_3) ◽  
pp. 92-92
Author(s):  
Raquel Lunedo ◽  
Dani Perondi ◽  
Carine Vier ◽  
Uislei Orlando ◽  
Gustavo Lima ◽  
...  
Keyword(s):  
Body Weight ◽  
Growth Performance ◽  
Average Daily Gain ◽  
Experimental Unit ◽  
Nursery Pigs ◽  
Nutrition Programs ◽  
Two Phases ◽  
D 20 ◽  
Kg Medium ◽  
Dietary Strategies

Abstract Our objective was to determine the effects of feeding complex or simple diets to nursery pigs sorted by body weight (BW) on growth performance. A total of 1,296 pigs (PIC 337×Camborough, initially 5.8±0.10 kg) were used in a 35-d study. Pens of pigs were blocked by gender and randomly allotted to 1 of 6 treatments. Treatments included three BW categories: light (4.7±0.10 kg), medium (5.8±0.10 kg), and heavy (7.1±0.10 kg); and two dietary strategies: simple (SD) or complex (CD) diets. Treatments were fed in two phases from d 0-10 and 10-20, followed by 15-d with common diet. Simple diets had greater soybean meal (20/26 vs 12/20%) and phytase levels (2,000 vs 500FTU/kg), lower specialty protein (8.1/4.2 vs 12.0/6.8%) and lactose levels (12/5.3 vs 18/11.5%) compared to CD. There were 8 or 11 pens per treatment and 24 pigs per pen. Data were analyzed using the GLIMMIX procedure of SAS with pen as the experimental unit. There was no evidence of interaction for any response criteria. During the treatment period (d 0-20), pigs fed CD had greater (P< 0.05) average daily gain (ADG), average daily feed intake (ADFI), and improved (P< 0.10) feed efficiency (G:F) compared to pigs fed SD. During the common period (d 20-35), pigs fed SD had greater (P< 0.05) ADG and ADFI compared to pigs fed CD. Overall (d 0-35), there was no evidence of differences in ADG, ADFI, G:F, and final BW between SD or CD. Heavy pigs had the greatest (P< 0.05) ADG and ADFI followed by medium and light pigs. In conclusion, pigs fed SD after weaning had poorer performance compared to pigs fed CD but were able to recover the loss in performance when switched to a common diet. This indicates nursery nutrition programs can be simplified without negatively affecting performance from 5.8 to 16.6 kg.

scholarly journals 73 Effects of dietary neutral detergent fiber and standardized ileal digestible lysine levels on growth performance and carcass characteristics of growing-finishing pigs

2020 ◽  
Vol 98 (Supplement_3) ◽  
pp. 57-58
Author(s):  
Uislei Orlando ◽  
Ning Lu ◽  
Carine Vier ◽  
Wayne Cast ◽  
Xun Zhou ◽  
...  
Keyword(s):  
Growth Performance ◽  
Block Design ◽  
Average Daily Gain ◽  
Neutral Detergent Fiber ◽  
Feed Ratio ◽  
Experimental Unit ◽  
Finishing Pigs ◽  
Dietary Treatments ◽  
Daily Gain ◽  
Standardized Ileal Digestible Lysine

Abstract Our objective was to determine the effects of feeding different neutral detergent fiber (NDF) and standardized ileal digestible (SID) lysine (Lys) levels on performance of growing-finishing pigs from 30- to 130-kg. A total of 2,016 barrows and gilts (PIC 280×Camborough, initial BW of 29.6±0.53 kg) were allotted to a randomized complete block design with a 2×2 factorial arrangement. Dietary treatments (Table 1) consisted with two NDF levels (13% or 20%) and two SID Lys curves (PIC2008 or PIC2016). There were 21 mixed-sex pigs per pen, and 24 pens per treatment. The experiment diets were fed in 3 phases. Wheat, wheat by-products, peas, and canola oil were used with NRC (2012) loading values to achieve treatments, and all diets were formulated to be iso-caloric (2,420 kcal NE/kg). Experimental data were analyzed using generalized linear mixed models with pen as the experimental unit. Increasing NDF level resulted in a reduction (P< 0.05) in average daily gain (ADG), average daily feed intake, hot carcass weight, carcass yield, carcass ADG, and backfat depth (Table 2), and tended to decrease percentage of removals and mortality (P=0.10). Pigs fed PIC2016 Lys curve had greater ADG and carcass ADG as compared to those fed PIC2008 Lys curve (P< 0.05). There were NDF×Lys interactions (P< 0.10) for ADG, gain to feed ratio (G:F), carcass ADG, and carcass G:F. These response criteria were improved for pigs fed PIC2016 Lys curve compared to those fed PIC2008 Lys curve when NDF level was 13%; while no evidence of differences was observed at 20% NDF. Results indicate that increasing NDF level from 13 to 20% deteriorate performance of 30- to 130- kg pigs; and the improved growth performance of pigs fed PIC2016 Lys curve as compared to those fed PIC2008 Lys curve was only observed when lower NDF level was presented.

Sign in / Sign up

Export Citation Format

Share Document