scholarly journals 280 Effects of metabolizable energy and standardized ileal digestible lysine levels on lactating sow and litter performance

2020 ◽  
Vol 98 (Supplement_3) ◽  
pp. 95-96
Author(s):  
Gustavo Silva ◽  
Robyn Thompson ◽  
Brandon Knopf ◽  
Laura L Greiner ◽  
Jose A Soto ◽  
...  
Keyword(s):  
Litter Size ◽  
Feed Intake ◽  
Metabolizable Energy ◽  
Experimental Unit ◽  
Main Effect ◽  
Lactating Sows ◽  
Dietary Treatments ◽  
Daily Gain ◽  
Lactating Sow ◽  
Standardized Ileal Digestible Lysine

Abstract The objective was to determine the effects of metabolizable energy (ME) and standardized ileal digestible (SID) lysine (Lys) levels on lactating sows and litter performance. A total of 600 sows (Camborough; PIC, Hendersonville, TN) were blocked by parity (P1, P2, P3+) on d 112 of gestation and allotted to 1 of 6 treatments arranged in a 2 x 3 factorial with the main effect of ME (3.2 and 3.4 Mcal/kg) and SID Lys (0.70, 0.85, and 1.00 %). Corn-soybean meal-based diets were fed from farrowing until weaning (d 21±2.3). Litters were cross-fostered until 48-h after farrowing to equalize litter size. Sows were weighed at d 112 of gestation and at weaning. Litter size and weight were collected at 24-h post-farrow and weaning. Daily feed intake was recorded from 48-h post-farrow until weaning. Data were analyzed using the GLIMMIX procedure of SAS with sow as the experimental unit. There was no evidence of interaction between ME and SID Lys for any response criteria. There was no evidence for an ME effect on sow performance. There was a quadratic effect (P< 0.05) of SID Lys on sow average daily feed intake, with the greatest intake at 0.85% SID Lys. Increasing SID Lys levels increased sow BW change (linear, P< 0.05). Litters from sows fed 3.4 Mcal of ME/kg had greater (P< 0.05) daily gain compared to those from sows fed 3.2 Mcal of ME/kg. Increasing SID Lys levels increased (linear, P< 0.05) litter weight at weaning and piglet daily gain. Wean-to-estrus interval, percentage of sows bred after weaning, total born on the subsequent parity, litter size at weaning, and percent of piglet removals were not influenced by dietary treatments. In summary, increasing ME levels did not affect sow performance, but improved litter and piglet daily gain. Increasing SID Lys levels improved both litter and sow performance.

scholarly journals PSV-8 Effects of soybean meal concentration in lactating sow diets on sow and litter performance

2019 ◽  
Vol 97 (Supplement_2) ◽  
pp. 195-195
Author(s):  
Kiah M Gourley ◽  
Jason C Woodworth ◽  
Joel M DeRouchey ◽  
Mike D Tokach ◽  
Steve S Dritz ◽  
...  
Keyword(s):  
Litter Size ◽  
Soybean Meal ◽  
Feed Intake ◽  
Serum Urea ◽  
Litter Weight ◽  
Total Diet ◽  
Nitrogen Concentrations ◽  
D 20 ◽  
Dietary Treatments ◽  
Lactating Sow

Abstract A total of 133 sows (Line 241; DNA, Columbus, NE) were used to evaluate the effect of increasing soybean meal concentration in lactating sow diets on sow and litter performance. Sows were blocked by body weight and parity on d 112 of gestation and allotted to 1 of 3 treatments of increasing soybean meal (25, 30, or 35% of total diet). Diets were formulated to contain 1.05% SID Lys with L-Lys HCl decreasing as soybean meal increased. All other amino acids and nutrients were formulated to meet nutrient requirement recommendations with L-threonine, DL-methionine, L-tryptophan, and L-valine added to the 25% SBM diet. Diets were fed from d 112 of gestation until weaning (d 20 ± 2). Litters were cross-fostered until 48 h after farrowing to equalize litter size. Sow average daily feed intake from d 0 to 7 was similar across dietary treatments. However, ADFI decreased from d 7 to 14, d 14 to weaning, and overall, (linear, P = 0.017) sow BW loss, and tended to increase (quadratic, P = 0.052) backfat loss from farrowing to weaning. There was no evidence for difference between dietary treatments in litter size, litter weight, nursing litter weight gain at weaning, or wean to estrus interval. Sow serum urea nitrogen concentrations taken on d 14 increased (linear, P = 0.001) as soybean meal concentration increased; however, there was no evidence for difference in serum creatinine. In summary, sow feed intake decreased and sow weight and backfat loss increased with increasing soybean meal concentration with no differences observed for litter performance.

scholarly journals 186 Effects of soybean meal concentration in lactating sow diets on sow and litter performance

2019 ◽  
Vol 97 (Supplement_2) ◽  
pp. 104-104
Author(s):  
Kiah M Gourley ◽  
Jason C Woodworth ◽  
Joel M DeRouchey ◽  
Mike D Tokach ◽  
Steve S Dritz ◽  
...  
Keyword(s):  
Litter Size ◽  
Soybean Meal ◽  
Feed Intake ◽  
Serum Urea ◽  
Litter Weight ◽  
Total Diet ◽  
Nitrogen Concentrations ◽  
D 20 ◽  
Dietary Treatments ◽  
Lactating Sow

Abstract A total of 133 sows (Line 241; DNA, Columbus, NE) were used to evaluate the effect of increasing soybean meal concentration in lactating sow diets on sow and litter performance. Sows were blocked by body weight and parity on d 112 of gestation and allotted to 1 of 3 treatments of increasing soybean meal (25, 30, or 35% of total diet). Diets were formulated to contain 1.05% SID Lys with L-Lys HCl decreasing as soybean meal increased. All other amino acids and nutrients were formulated to meet nutrient requirement recommendations with L-threonine, DL-methionine, L-tryptophan, and L-valine added to the 25% SBM diet. Diets were fed from d 112 of gestation until weaning (d 20 ± 2). Litters were cross-fostered until 48 h after farrowing to equalize litter size. Sow average daily feed intake from d 0 to 7 was similar across dietary treatments. However, ADFI decreased from d 7 to 14, d 14 to weaning, and overall, (linear, P = 0.017) sow BW loss, and tended to increase (quadratic, P = 0.052) backfat loss from farrowing to weaning. There was no evidence for difference between dietary treatments in litter size, litter weight, nursing litter weight gain at weaning, or wean to estrus interval. Sow serum urea nitrogen concentrations taken on d 14 increased (linear, P = 0.001) as soybean meal concentration increased; however, there was no evidence for difference in serum creatinine. In summary, sow feed intake decreased and sow weight and backfat loss increased with increasing soybean meal concentration with no differences observed for litter performance.

scholarly journals 147 Effects of added dietary Zn and Cu or an essential oils blend in a nursery feeding program

2019 ◽  
Vol 97 (Supplement_2) ◽  
pp. 83-83
Author(s):  
Robyn Thompson ◽  
Brandon Knopf ◽  
Laura Greiner ◽  
Jon R Bergstrom
Keyword(s):  
Essential Oils ◽  
Feed Intake ◽  
Feed Efficiency ◽  
Average Daily Gain ◽  
Negative Control ◽  
Experimental Unit ◽  
Weaned Pigs ◽  
Main Effect ◽  
Feeding Program ◽  
Daily Gain

Abstract Approximately 1,200 weaned pigs (8.8 ± 1 kg; Camborough×337, PIC, Hendersonville, TN) were used to evaluate the effects of a blend of essential oils compared to therapeutic programs [negative control (NC), Carbodox (NC + 55 ppm Mecadox, Phibro, Teaneck, NJ; MX), added ZnO and CuSO4 (NC + 2,000 ppm Zn and 150 ppm Cu in P1 and 150 ppm Cu in P2; ZnCu), and essential oils blend (NC + 0.4% Victus Liv, DSM Nutritional Products, Parsippany, NJ; VL)]. Pigs were allotted to the treatments 10 d after weaning. Treatments occurred over 2 phases: 14 d (P1) and 21 d (P2). Average daily gain (ADG), average daily feed intake (ADFI), and feed efficiency (F:G) were evaluated. Data were analyzed as a CRD using the PROC MIXED procedure of SAS with pen as the experimental unit and treatment as main effect. During P1, pigs fed MX or ZnCu had increased ADG compared with NC (P = 0.001 and P = 0.003, respectively) and VL (P = 0.007 and P = 0.018, respectively). Pigs fed MX, VL, or ZnCu had improved F:G compared to NC (P < 0.0001, P = 0.04, and P = 0.001, respectively). In P2, ZnCu or MX increased ADG compared to VL (P = 0.03, P = 0.06, respectively) and ZnCu tended to increase ADG compared to NC (P = 0.07). Overall (d 0 to 35), VL tended to decrease the percent removals compared with NC (P = 0.07). In conclusion, feeding MX or ZnCu improved ADG and F:G and diets with VL resulted in the least removals.

scholarly journals Effects of soybean meal concentration in lactating sow diets on sow and litter performance and blood criteria1

2020 ◽  
Vol 4 (2) ◽  
pp. 594-601
Author(s):  
Kiah M Gourley ◽  
Jason C Woodworth ◽  
Joel M DeRouchey ◽  
Mike D Tokach ◽  
Steve S Dritz ◽  
...  
Keyword(s):  
Litter Size ◽  
Soybean Meal ◽  
Feed Intake ◽  
Dietary Treatment ◽  
Creatinine Concentration ◽  
Urea Nitrogen ◽  
Litter Weight ◽  
Total Diet ◽  
Dietary Treatments ◽  
Lactating Sow

Abstract A total of 131 sows (Line 241; DNA, Columbus, NE) were used in a study to evaluate the effect of increasing soybean meal concentration in lactating sow diets on sow and litter performance. Sows were blocked by body weight (BW) within parity on day 112 of gestation and allotted to one of three treatments of increasing dietary soybean meal (25%, 30%, or 35% of the total diet). Diets were formulated to 1.05% standardized ileal digestible lysine (Lys) with L-Lys HCl decreasing as soybean meal increased. All other amino acids and nutrients were formulated to meet nutrient requirement recommendations. Diets were fed from day 112 of gestation until weaning (day 20 ± 2). Litters were cross-fostered up to 48 h after farrowing to equalize litter size. Increasing soybean meal concentration increased (linear, P = 0.017) sow BW loss and tended to increase (quadratic, P = 0.052) sow backfat loss from farrowing to weaning. Sow average daily feed intake (ADFI) from day 0 to 7 was similar (P &gt; 0.10) across dietary treatments. However, from day 7 to 14, 14 to weaning, and overall, ADFI decreased (linear, P = 0.01) as soybean meal concentration increased. Despite the linear response in ADFI, the greatest decrease was observed as soybean meal concentration increased from 30% to 35% of the diet. There was no evidence for difference (P &gt; 0.10) in wean-to-estrus interval, litter size, litter weight, or litter weight gain between dietary treatments. Sow serum urea nitrogen concentrations taken on day 14 of lactation increased (linear, P = 0.001) as soybean meal concentration increased. There was no difference (P &gt; 0.05) for sow creatinine concentration, regardless of dietary treatment, suggesting that the increased urea nitrogen was a reflection of the increased dietary crude protein as opposed to increased protein catabolism. In summary, sow feed intake decreased and weight loss increased as soybean meal concentration of the diet increased, with the greatest decrease observed at 35% of the total diet. Although there were no differences in litter performance, it appeared that 35% soybean meal in the lactation diet negatively affected feed intake.

scholarly journals PSII-20 Evaluation of Different Vitamin Concentrations in a Commercial Wean-to-Finish Program

2020 ◽  
Vol 98 (Supplement_3) ◽  
pp. 170-171
Author(s):  
Robyn Thompson ◽  
Brandon Knopf ◽  
Carine Vier ◽  
Ning Lu ◽  
Wayne Cast ◽  
...  
Keyword(s):  
Vitamin E ◽  
Growth Performance ◽  
Feed Intake ◽  
Block Design ◽  
Average Daily Gain ◽  
Serum Vitamin ◽  
Experimental Unit ◽  
Final Body Weight ◽  
Dietary Treatments ◽  
Daily Gain

Abstract Our objective was to evaluate the effects of different vitamin concentrations on growth performance of wean-to-finish pigs under commercial conditions. A total of 900 barrows and gilts (PIC337×Camborough; initially 5.34±0.13 kg) were used in a 136-d growth trial with 25 pigs per pen and 12 pens per treatment in a randomized complete block design. Experimental diets were fed in 3 phases during nursery (5-6, 6-13, and 13-26 kg) and 5 phases during grow-finish (26-44, 44-65, 65-87, 87-108, and 108-128 kg). Dietary treatments consisted of: 1) NRC: vitamin concentrations following NRC (2012) recommendations; 2) PIC: vitamin concentrations following PIC (2016) recommendations; 3) Low-PIC: vitamin concentrations that ranged from 0 to 91% of PIC recommendations. Data were analyzed using the GLIMMIX procedure of SAS with pen as the experimental unit. During the nursery period, pigs fed PIC and Low-PIC diets had greater (P&lt; 0.05) average daily feed intake (ADFI) compared to pigs fed NRC diets. There was no evidence (P &gt;0.10) for differences in average daily gain (ADG) and feed efficiency (G:F). During the grow-finish period, there was no evidence (P &gt;0.10) for differences in growth performance. During the overall wean-to-finish period, pigs fed PIC diets had lower (P&lt; 0.05) ADG and final body weight compared to pigs fed NRC and Low-PIC diets. There was no evidence (P &gt;0.10) for differences in ADFI or G:F. Pigs fed PIC diets had the greatest serum vitamin D3 at the end of nursery and finish periods (P&lt; 0.05) and the greatest serum Vitamin E at the end of nursery period (P&lt; 0.05). In summary, pigs fed PIC and Low-PIC diets had greater nursery feed intake and serum vitamin E and D3 concentrations compared to pigs fed NRC diets. Data from this study have demonstrated that pigs fed diets with reduced vitamin concentrations compared to PIC (2016) recommendations had improved wean-to-finish growth rate.

scholarly journals 279 Evaluation of the NRC (2012) model in estimating standard maintenance metabolizable energy requirement of PIC sows during mid-gestation

2020 ◽  
Vol 98 (Supplement_3) ◽  
pp. 98-98
Author(s):  
Mark Knauer ◽  
Jerry Purvis ◽  
Ning Lu ◽  
Uislei Orlando ◽  
Carine Vier ◽  
...  
Keyword(s):  
Body Weight ◽  
Energy Requirement ◽  
Average Daily Gain ◽  
Regression Equation ◽  
Metabolizable Energy ◽  
Experimental Unit ◽  
Score Change ◽  
Randomized Design ◽  
Daily Gain ◽  
Standardized Ileal Digestible Lysine

Abstract The objective was to evaluate the NRC (2012) model in predicting standard maintenance metabolizable energy (MEm) of PIC sows during mid-gestation. A total of 201 PIC Camborough sows (parity 1 to 10) were randomly assigned to 1 of 4 treatments in a complete randomized design between day 36 and 46 post-breeding. Treatments consisted of feeding sows with daily feed allowances to meet 80, 90, 100 or 110% of MEm calculated as MEm, kcal/day = 100 × (body weight)0.75. A common corn-soybean meal-based diet with 3,302 kcal of ME/kg and 0.61% standardized ileal digestible lysine was fed for 28 days. Sow body weight (BW) and sow body condition caliper score (CS) were captured at day 0, 14 and 28. Data were analyzed with PROC GLM of SAS with sow as experimental unit. Average sow parity and feed allowance were 4.2 and 1.79 kg/day, respectively. Average sow BW and sow CS at day 0, 14 and 28 were 234, 233 and 242 kg and 14.9, 14.9 and 14.8, respectively. Increasing feed allowances to meet 80 to 110% of MEm requirement increased (linear, P&lt; 0.01) average daily gain (ADG; 0.100, 0.259, 0.417 and 0.440 kg/d, respectively). The estimated regression equation was ADG, kg/day = -0.83 + 1.193 × MEm, estimating the MEm to maintain BW was below 80% of NRC (2012) estimate. Caliper score change (CSC) increased (linear, P&lt; 0.01) with increasing feed allowances to meet 80 to 110% of MEm requirement (-0.78, -0.26, 0.13, and 0.35, respectively). The estimated regression equation was CSC = -3.73 + 3.78 × MEm, estimating the MEm to maintain CS at 98.7% of NRC (2012) estimate. In summary, results showed that the MEm to maintain BW and CS for PIC sows during mid-gestation was below 80% and at 98.7%, respectively, of NRC (2012) estimated requirement.

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&lt; 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&lt; 0.05). There were NDF×Lys interactions (P&lt; 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.

scholarly journals 198 Effects of different dietary standardized ileal digestible lysine specifications on growth performance of grow-finish pigs

2020 ◽  
Vol 98 (Supplement_3) ◽  
pp. 56-57
Author(s):  
Ning Lu ◽  
Carine Vier ◽  
Wayne Cast ◽  
Uislei Orlando ◽  
Dan Hamilton ◽  
...  
Keyword(s):  
Growth Performance ◽  
Feed Intake ◽  
Block Design ◽  
Average Daily Gain ◽  
Experimental Unit ◽  
Randomized Complete Block Design ◽  
Similar Growth ◽  
Daily Gain ◽  
Growth Trial ◽  
Standardized Ileal Digestible Lysine

Abstract The objective was to determine the effects of different standardized ileal digestible (SID) lysine (Lys) specifications on performance of grow-finish pigs. A total of 2,106 pigs (PIC 359×Camborough, initially 22.0±0.43 kg) were used in a 72-d growth trial with 27 pigs per pen and 13 pens per treatment in a randomized complete block design. Pigs were fed corn-soybean-meal-based diets in three phases from 22-41, 41-62, and 62-91 kg body weight (BW). Treatments consisted of low (L) or high (H) SID Lys in each phase: LLL (1.05, 0.88, and 0.73%); LLH (1.05, 0.88, and 0.82%); LHH (1.05, 0.99, and 0.82%); HLL (1.18, 0.88, and 0.73%); HHL (1.18, 0.99, and 0.73%); and HHH (1.18, 0.99, and 0.82%). Lysine curves from PIC2008 and PIC2016 nutrient specification manuals were used to estimate SID Lys levels for L or H diets, respectively. Data were analyzed using generalized linear mixed models with pen as the experimental unit. From 22-41 kg, feeding high Lys improved (P&lt; 0.10) average daily gain (ADG), feed efficiency (G:F), and final BW compared to low Lys. From 22-62 kg, feeding HH Lys increased (P&lt; 0.05) ADG compared feeding LL or HL Lys. Pigs fed HH Lys or LH Lys had improved (P&lt; 0.05) G:F compared to those fed LL Lys. Pigs fed LH or HH Lys had greater (P&lt; 0.05) final BW compared to pigs fed HL. Pigs fed HH Lys had greater (P&lt; 0.05) feed intake compared to pigs fed HL. From 22-91 kg, there was no evidence for differences in ADG, feed intake, G:F, or final BW. In summary, pigs fed 1.18% SID Lys had improved ADG, G:F, and final BW compared to pigs fed 1.05% SID Lys from 22-41 kg. Feeding a range of Lys specifications resulted in similar growth performance from 22-91 kg.

scholarly journals Impact of feed intake in early gestation on maternal growth and litter size according to body reserves at weaning of young parity sows

2020 ◽  
Vol 98 (3) ◽  
Author(s):  
André L Mallmann ◽  
Gabriela S Oliveira ◽  
Rafael R Ulguim ◽  
Ana Paula G Mellagi ◽  
Mari L Bernardi ◽  
...  
Keyword(s):  
Litter Size ◽  
Body Condition ◽  
Feed Intake ◽  
Body Condition Score ◽  
Metabolizable Energy ◽  
Early Gestation ◽  
Unit Class ◽  
Condition Score ◽  
Farrowing Rate ◽  
Standardized Ileal Digestible Lysine

Abstract The effect of increasing the feed level (1.8, 2.5, and 3.2 kg/d) during early gestation in parity 1 (PO1) and parity 2 (PO2) sows on maternal growth and litter size was evaluated. A total of 361 sows were group-housed and fed a diet based on a corn–soybean meal (3.15 Mcal Metabolizable Energy (ME) per kg and 0.68% standardized ileal digestible lysine) from day 6 of gestation until day 30. Sows were weighed at weaning and on day 30 of gestation. Farrowing rate, number of total piglets born, piglets born alive, stillborn piglets, and mummified fetuses were recorded at farrowing. The effect of feed level on the total number of piglets born was also evaluated according to classes of body weight (BW), body condition score (BCS), backfat (BF), and caliper unit at weaning for each parity order. There was no evidence for significant effect of the interaction between feed level × parity on the variables related to maternal growth and reproductive performance (P ≥ 0.128). Greater feed levels linearly increased the gains in body condition (i.e., BW, BCS, BF, and caliper unit) between weaning and day 30 of gestation (P &lt; 0.001). Farrowing rate was not influenced by the feed level (P ≥ 0.200) and parity (P ≥ 0.209). The number of total piglets born decreased linearly as the feed level increased (P = 0.041), whereas no evidences for differences were observed on piglets born alive among treatments (P ≥ 0.317), neither between parities (P ≥ 0.904). For PO1 sows, the total piglets born on BW classes (≤183 vs. &gt;183 kg) and on classes of BF (≤11.5 vs. &gt; 11.5 mm) were quadratically affected by the feed levels (P ≤ 0.041). In contrast, the number of total piglets born was marginally affected (linear; P ≤ 0.094) by the feed level in the different classes of BW, BCS, and caliper unit in PO2 sows. There was no evidence for differences for the interaction of feed level and classes of body condition (P ≥ 0.199) for PO2 sows. Similarly, no interactions between feed level and classes of BW, BCS, and BF at weaning were observed (P ≥ 0.233) for PO1 sows; however, the total piglets born were affected by an interaction between feed level and caliper unit class (P = 0.042). In conclusion, increased feed intake from day 6 of gestation until day 30 resulted in increased maternal BW gain but reduced the number of total piglets born. Furthermore, lighter and in a poor BCS PO1 sows at weaning produced fewer total born piglets with no benefits from greater amounts of feed.

PSIV-15 Influence of Particle Size of Enogen Feed Corn and Conventional Yellow Dent Corn on Lactating Sow Performance

2021 ◽  
Vol 99 (Supplement_1) ◽  
pp. 182-183
Author(s):  
Hadley Williams ◽  
Mike D Tokach ◽  
Jason C Woodworth ◽  
Robert D Goodband ◽  
Joel M DeRouchey ◽  
...  
Keyword(s):  
Particle Size ◽  
Feed Intake ◽  
Dietary Treatment ◽  
Experimental Unit ◽  
Dent Corn ◽  
Main Effect ◽  
Source Particle ◽  
Size Interaction ◽  
Main Effects ◽  
Lactating Sow

Abstract A total of 107 sows (Line 241; DNA, Columbus, NE) across 4 batch farrowing groups were used to evaluate the effects of corn source and particle size on sow and litter performance. Treatments were arranged in a 2×2 factorial with main effects of corn source (Enogen® Feed corn (Syngenta Seeds, Downers Grove, IL) or conventional yellow dent corn) and ground corn particle size (600 or 900 µm). Sows were blocked by parity and BW upon arrival to the farrowing house. There were approximately 27 sows per treatment, sow was considered the experimental unit, dietary treatment was a fixed effect, and sow group and block were used as random effects. Main effects of corn source and particle size as well as their interactions were tested. From farrowing to weaning, there was a tendency for a source×particle size interaction (P=0.065) for sow BW change. Sows fed 900 µm Enogen Feed corn had decreased BW loss compared to sows fed other treatments which were similar in BW loss. There was a source×particle size interaction (P=0.048) for lactation ADFI with sows fed 900 µm conventional yellow dent corn having lower feed intake than the sows fed 600 µm conventional yellow dent corn, whereas sows fed 900 µm Enogen Feed corn had greater feed intake compared to the sows fed 600 µm Enogen Feed corn. There was a tendency for a particle size main effect (P&lt;0.10) for litter ADG (2,849 vs 2,635 g/d) and total litter gain (45.7 vs 42.3 kg), with sows fed corn ground to 600 µm having increased litter ADG and total litter gain compared to sows fed corn ground to 900 µm. In summary, there were few differences in sow or litter characteristics among corn sources. Reducing particle size of both corn sources tended to increase litter ADG and weaning weights.

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