scholarly journals 284 Effect of formulating diets based on a ratio between STTD Ca and STTD P and the inclusion of phytase on growth performance, plasma Ca and P, and bone ash of pigs from 11 to 130 kg

2020 ◽  
Vol 98 (Supplement_3) ◽  
pp. 104-105
Author(s):  
Vanessa Lagos ◽  
Mike R Bedford ◽  
Hans H Stein
Keyword(s):  
Growth Performance ◽  
Repeated Measures ◽  
Finishing Pigs ◽  
Short Term ◽  
Diet Formulation ◽  
Bone Ash ◽  
Microbial Phytase ◽  
The Right ◽  
Main Effects ◽  
Interaction Phase

Abstract A 126-d experiment was conducted to test the hypothesis that the requirement for Ca expressed as a ratio between standardized total tract digestible (STTD) Ca and STTD P obtained in short-term experiments may be applied to pigs fed diets without or with microbial phytase from 11 to 130 kg. In a 5-phase program, 160 pigs (11.2 ± 1.8 kg) were randomly allotted to 32 pens and 4 corn-soybean meal diets in a 2 × 2 factorial design with 2 formulation strategies (total Ca or STTD Ca), and 2 phytase levels (0 or 500 units/kg) assuming phytase released 0.11% STTD P and 0.16% total Ca. The STTD Ca:STTD P ratios were 1.40:1, 1.35:1, 1.25:1, 1.18:1, and 1.10:1 for phases 1 to 5. At the conclusion of each phase, weights of pigs and feed left in feeders were recorded and a blood sample from 1 pig per pen was collected. At the end of phases 1 (d 24) and 5, the right femur of 1 pig per pen was collected. Data were analyzed as main effects of formulation strategy and phytase level and their interaction. Phase effect was analyzed by repeated measures. No interactions were observed and formulation strategy and phytase did not impact growth performance, bone ash, or plasma Ca and P on d 24 (Table 1). On d 126, an interaction (P < 0.05) between main effects was observed. Without phytase, pigs fed diets based on total Ca had greater bone ash than STTD Ca pigs, but with phytase, no differences were observed. A negative quadratic effect (P < 0.05) of phase for plasma Ca and P was observed. In conclusion, STTD Ca:STTD P ratios can be used in diet formulation for growing-finishing pigs without affecting growth performance. Phytase ameliorates bone resorption caused by low Ca in STTD Ca diets.

scholarly journals Formulating diets based on digestible calcium instead of total calcium does not affect growth performance or carcass characteristics, but microbial phytase ameliorates bone resorption caused by low calcium in diets fed to pigs from 11 to 130 kg

2021 ◽  
Author(s):  
L Vanessa Lagos ◽  
Su A Lee ◽  
Mike R Bedford ◽  
Hans H Stein
Keyword(s):  
Bone Resorption ◽  
Growth Performance ◽  
Blood Sample ◽  
Phase 1 ◽  
Carcass Characteristics ◽  
Phase 2 ◽  
Diet Formulation ◽  
Bone Ash ◽  
Microbial Phytase ◽  
The Right

Abstract An experiment was conducted to test the hypothesis that the requirement for Ca expressed as a ratio between standardized total tract digestible (STTD) Ca and STTD P obtained in short-term experiments may be applied to pigs fed diets without or with microbial phytase from 11 to 130 kg. In a 5-phase program, 160 pigs (body weight: 11.2 ± 1.8 kg) were randomly allotted to 32 pens and 4 corn-soybean meal based diets in a 2 × 2 factorial design with 2 diet formulation principles (total Ca or STTD Ca), and 2 phytase inclusion levels (0 or 500 units/kg of feed) assuming phytase released 0.11% STTD P and 0.16% total Ca. The STTD Ca:STTD P ratios were 1.40:1, 1.35:1, 1.25:1, 1.18:1, and 1.10:1 for phases 1 to 5, and STTD P was at the requirement. Weights of pigs and feed left in feeders were recorded at the end of each phase. At the conclusion of phase 1 (d 24), 1 pig per pen was euthanized and a blood sample and the right femur were collected. At the end of phases 2 to 5, a blood sample was collected from the same pig in each pen. At the conclusion of the experiment (d 126), the right femur of 1 pig per pen was collected and carcass characteristics from this pig were measured. No interactions were observed between diet formulation principle and phytase inclusion for growth performance in any phase and no differences among treatments were observed for overall growth performance. Plasma Ca and P and bone ash at the end of phase 1 were also not influenced by dietary treatments. However, on d 126, pigs fed non-phytase diets formulated based on total Ca had greater bone ash than pigs fed STTD Ca based diets, but if phytase was used, no differences were observed between the 2 formulation principles (interaction P < 0.05). At the end of phases 2 and 3, pigs fed diets without phytase had greater (P < 0.05) plasma P than pigs fed diets with phytase, but no differences were observed at the end of phases 4 and 5. A negative quadratic effect (P < 0.05) of phase (2 to 5) on the concentration of plasma Ca was observed, whereas plasma P increased (quadratic; P < 0.05) from phase 2 to 5. However, there was no interaction or effect of diet formulation principle or phytase inclusion on any carcass characteristics measured. In conclusion, STTD Ca to STTD P ratios can be used in diet formulation for growing-finishing pigs without affecting growth performance or carcass characteristics and phytase inclusion ameliorates bone resorption caused by low dietary Ca and P.

scholarly journals 282 Effect of formulating diets based on a ratio between STTD Ca and STTD P and the inclusion of phytase on the calcium and phosphorus balance of growing pigs

2020 ◽  
Vol 98 (Supplement_3) ◽  
pp. 103-104
Author(s):  
Vanessa Lagos ◽  
Mike R Bedford ◽  
Hans H Stein
Keyword(s):  
Block Design ◽  
Random Effect ◽  
Growing Pigs ◽  
Diet Formulation ◽  
Randomized Complete Block Design ◽  
Microbial Phytase ◽  
P Utilization ◽  
P Balance ◽  
Main Effects ◽  
P Absorption

Abstract An experiment was conducted to test the hypothesis that formulating diets for pigs based on a ratio between standardized total tract digestible (STTD) Ca and STTD P instead of total Ca and STTD P increases the efficiency of Ca and P utilization. Forty barrows (59.4 ± 3.8 kg) were individually housed in metabolism crates and allotted to 4 corn-soybean meal diets and 2 periods of 11 d in a randomized complete block design. Diets were formulated using a 2 × 2 factorial design with 2 Ca requirement estimates (total Ca or STTD Ca) and 2 inclusion levels of microbial phytase (0 or 500 units/kg). Phytase was assumed to release 0.11% STTD P and 0.16% total Ca. Diets were formulated based on requirements for total Ca and STTD P and the ratio between STTD Ca and STTD P was 1.25:1 in diets formulated based on STTD Ca. Fecal and urine samples were collected from feed provided from d 6 to 9. Data for Ca and P balance were analyzed using a model that included the main effects of diet formulation and phytase level, the interaction between main effects, and the random effect of period. Interactions (P < 0.05) between diet formulation and phytase level were observed for Ca intake, Ca in feces, Ca digestibility, Ca retained as a percentage of intake, P digestibility, P absorbed, and P in urine (Table 1). Despite being provided less (P < 0.05) Ca, pigs fed diets formulated based on STTD Ca did not absorb or retain less Ca than pigs fed total Ca diets, but they absorbed more (P < 0.05) P than pigs fed diets formulated based on total Ca. In conclusion, by formulating diets based on values for STTD Ca, P absorption was increased confirming detrimental effects of oversupplying Ca.

Effect of Monitor Placement on the Daily Step Counts of Wrist and Hip Activity Monitors

2020 ◽  
Vol 3 (2) ◽  
pp. 164-169
Author(s):  
Susan Park ◽  
Lindsay P. Toth ◽  
Scott E. Crouter ◽  
Cary M. Springer ◽  
Robert T. Marcotte ◽  
...  
Keyword(s):  
Repeated Measures ◽  
Styloid Process ◽  
Pairwise Comparisons ◽  
Daily Step ◽  
Ulnar Styloid ◽  
Activity Monitors ◽  
Step Counts ◽  
Main Effect ◽  
The Right ◽  
Main Effects

Purpose: To examine the effect of activity monitor placement on daily step counts when monitors are worn at different positions on the wrist/forearm and the hip. Methods: Participants (N = 18) wore eight different models (four wrist and four hip models) across four days. Each day, one hip and one wrist model were selected, and four identical monitors of each model were worn on the right hip and the non-dominant wrist/forearm, respectively, during all waking hours. Step counts of each monitor were compared to the same model worn in the referent position (wrist: proximal to ulnar styloid process; hip: midline of thigh). Percent of referent steps and mean difference between observed and referent positions were computed. Significant differences in steps between positions for each method were determined using one-way repeated measures ANOVAs. For significant main effects, pairwise comparisons with Bonferroni corrections were used to determine which positions were significantly different. Results: All wrist methods showed a significant main effect for placement (p < .05) and alternate positions were 1–16% lower than the referent position. For hip methods, only the Omron HJ-325 differed across positions (p < .05), but differences were among non-referent positions and all were within ±2% of steps recorded by the referent position. Conclusions: Researchers should be aware that positions that deviate from the manufacturer’s recommended position at the wrist could influence step counts. Of all hip methods examined, the Omron had a significant placement effect which did not constitute a practical difference.

scholarly journals 173 Effects of dietary analyzed calcium to analyzed phosphorus ratio on growth performance, carcass characteristics, and bone mineralization in 26- to 127-kg pigs

2019 ◽  
Vol 97 (Supplement_2) ◽  
pp. 101-101
Author(s):  
Carine M Vier ◽  
Steve S Dritz ◽  
Mike D Tokach ◽  
Márcio A D Gonçalves ◽  
Uislei A D Orlando ◽  
...  
Keyword(s):  
Growth Performance ◽  
Bone Mineralization ◽  
Block Design ◽  
Experimental Unit ◽  
Finishing Pigs ◽  
Bone Ash ◽  
Dietary Treatments ◽  
Best Fit ◽  
Growth Trial ◽  
Ca:P Ratio

Abstract Our objective was to determine the effects of feeding different analyzed calcium to phosphorus (Ca:P) ratios on performance of growing-finishing pigs from 26 to 127-kg. A total of 1,134 barrows and gilts (PIC 359×Camborough, initial BW 26.3 ± 0.71 kg) were used in a 110-d growth trial with 27 pigs per pen and 7 pens per treatment in a randomized complete block design. The 6 dietary treatments were formulated to contain 0:75:1, 1.00:1, 1.25:1, 1.50:1, 1.75:1, and 2.00:1 analyzed Ca:P ratio. All diets were corn-soybean meal-based and were formulated to contain adequate standardized total tract digestible P (approximately 122% of NRC 2012 estimates) for the weight range in all 4 dietary phases. Treatments were achieved by increasing calcium carbonate at the expense of corn while maintaining a constant level of monocalcium phosphate. Experimental data were analyzed using generalized linear and nonlinear mixed models with pen as the experimental unit. Increasing analyzed Ca:P ratio increased (quadratic, P < 0.05) ADG, ADFI, and final BW. Feed efficiency (G:F) was relatively similar across analyzed Ca:P ratios of 0.75:1 to 1.75:1 but worsened (quadratic, P < 0.05) at the highest ratio of 2.00:1. Hot carcass weight (HCW) and carcass ADG increased (quadratic, P < 0.05) while carcass yield decreased (quadratic, P < 0.05) with increasing analyzed Ca:P ratio. Bone mineralization increased (quadratic, P < 0.05) with increasing analyzed Ca:P ratio. For ADG, ADFI, G:F, and bone ash, the quadratic polynomial model demonstrated the best fit. The maximum responses in ADG, ADFI, G:F, HCW, and bone ash were estimated at 1.38:1, 1.49:1, 1.29:1, 1.25:1, and 1.93:1 analyzed Ca:P ratio, respectively. In conclusion, for growing-finishing pigs from 26 to 127-kg fed diets adequate in STTD P, the analyzed Ca:P ratio to maximize growth performance and HCW criteria ranged from 1.25:1 to 1.49:1. A higher analyzed Ca:P ratio, estimated at 1.93:1, was required to maximize bone mineralization.

scholarly journals Influence of dietary 1αlpha-hydroxycholecalciferol, individually or in combination with microbial phytase in calcium and phosphorus deficient diets on growth performance and tibia parameter of Japanese quails (Coturnix japonica)

2018 ◽  
Vol 41 (1) ◽  
pp. 42540
Author(s):  
Farshd Kheiri ◽  
Mohammad Poshtvar ◽  
Sayed Mohammad Ali Jalali Haji Abadi ◽  
Nasir Landy
Keyword(s):  
Body Weight ◽  
Growth Performance ◽  
Coturnix Japonica ◽  
Deficient Diet ◽  
Japanese Quails ◽  
Bone Ash ◽  
Microbial Phytase ◽  
Calcium Phosphorus ◽  
Calcium And Phosphorus ◽  
Tibia Ash

  The effect of 1α-OH-D3 in calcium-phosphorus (Ca-P) deficient diets on Japanese quail growth performance and tibia parameters was investigated. Eight-day-old (n = 160) newly hatched quails were weighed and randomly allocated to 20 groups, each with 4 replicate pens of 8 birds. Treatments were as follows: T1, Ca-P-adequate; T2,Ca-P-deficient; T3, Ca-P-deficient + 500 FTU kg-1 of phytase (Ph); T4, Ca-P-deficient diet + 5 µg kg-1 of 1α-OH-D3; T5,Ca-P-deficient + Ph + 5 µg kg-1 of 1α-OH-D3. Results showed that quails fed Ca-P-adequate had significantly higher body weight compared with quails fed Ca-P-deficient, Ca-P deficient supplemented with 1α-OH-D3 and Ca-P-deficient supplemented with 1α-OH-D3 and phytase, but did not differ from Ca-P-deficient diet supplemented with phytase. Quails fed Ca-P deficient were unable to achieve FCR comparable to quails fed Ca-P-adequate (p < 0.05). The percentage of bone ash data indicated that quails fed Ca-P-adequate had higher tibia ash compared with other groups except for quails fed Ca-P deficient diet supplemented with combination of 1α-OH-D3 and phytase. Quails fed Ca-P-adequate had higher tibia P compared with quails fed Ca-P-deficient. In conclusion, these results indicated that quails fed Ca-P-deficient supplemented with 5 µg kg-1 of 1α-OH-D3 in combination of 500 FTU kg-1 of phytase were able to achieve the same tibia ash and Ca compared with quails fed Ca-P-adequate. 

scholarly journals Effects of Feed Removal during Acute Heat Stress on the Cytokine Response and Short-Term Growth Performance in Finishing Pigs

Animals ◽  
2021 ◽  
Vol 11 (1) ◽  
pp. 205
Author(s):  
Kouassi R. Kpodo ◽  
Alan W. Duttlinger ◽  
Jacob M. Maskal ◽  
Betty R. McConn ◽  
Jay S. Johnson
Keyword(s):  
Heat Stress ◽  
Growth Performance ◽  
Average Daily Gain ◽  
Temperature Treatment ◽  
Cytokine Response ◽  
Finishing Pigs ◽  
Short Term ◽  
Study Objective ◽  
Acute Heat Stress ◽  
Interleukin 1Α

The study objective was to evaluate the effects of feed removal during acute heat stress (HS) on the cytokine response and its short-term effect on growth performance in finishing pigs. Thirty-two pigs (93.29 ± 3.14 kg initial body weight; 50% barrows and 50% gilts) were subjected to thermoneutral (TN; 23.47 ± 0.10 °C; n = 16 pigs) or HS (cycling of 25 to 36 °C; n = 16 pigs) conditions for 24 h. Within each temperature treatment, 50% of the pigs were provided with feed (AF; n = 8 pigs/temperature treatment) and 50% of the pigs had no feed access (NF; n = 8 pigs/temperature treatment). Following the 24 h temperature and feeding treatment (TF) period, all pigs had ad libitum access to feed and water and were maintained under TN conditions for 6 d. During the first 12 h of the TF period, gastrointestinal (TGI) and skin (Tsk) temperatures were recorded every 30 min. Serum cytokines were determined at 0, 4, 8, 12, and 24 h during the TF period and on Days 3 and 6 of the post-TF period. Average daily gain (ADG) and average daily feed intake were measured on Days 1, 3, and 6 of the post-TF period. Behavioral data were collected from Days 1 to 6 of the post-TF period. Heat stress increased (p < 0.02) the TGI and Tsk. During the post-TF period, interleukin-1α was greater (p < 0.01) in HS + NF compared to HS + AF and TN + NF pigs. From Days 1 to 2 of the post-TF period, the ADG was reduced (p < 0.01) in TN + AF compared to HS + AF, HS + NF, and TN + NF pigs. In conclusion, feed removal during an acute HS challenge did not reduce the cytokine response or improve short-term growth performance in finishing pigs.

scholarly journals Effects of narasin or virginiamycin on growth performance and carcass characteristics of growing and finishing pigs

2021 ◽  
Author(s):  
Sara K Linneen ◽  
Roger A Arentson ◽  
J Jeffrey Chewning ◽  
Scott N Carr
Keyword(s):  
Growth Performance ◽  
Block Design ◽  
Animal Health ◽  
Carcass Characteristics ◽  
Experimental Unit ◽  
Finishing Pigs ◽  
Incomplete Block Design ◽  
Finishing Pig ◽  
Effect Of Treatment ◽  
Main Effects

Abstract The objective of this experiment was to determine the effects of narasin (NAR; Skycis®; Elanco Animal Health, Greenfield, IN) or virginiamycin (VIR; Stafac®; Phibro Animal Health Corporation, Teaneck, NJ) on finishing pig growth performance and carcass characteristics. Two separate experiments were conducted at the same site in 2013 and 2014. A total of 576 pigs (initial BW = 23.2 ± 0.19 kg) were housed in 24 pens with 8 pigs per pen in Exp. 1. In Exp. 2, a total of 888 pigs (initial BW = 26.2 ± 0.12 kg) were housed in 39 pens with 8 pigs per pen. Treatments consisted of a series of unmedicated corn-soybean meal diets (CON), CON + NAR (15 mg/kg), or CON + VIR (11 mg/kg) fed for 108 d (Exp. 1) or 109 d (Exp. 2). Pen was the experimental unit in both studies. Data were analyzed as a randomized complete block design with the main effects of block and treatment (Exp. 1) and as an incomplete block design with the fixed effect of treatment and the random effects of barn and barn within block (Exp. 2). In Exp.1, NAR and VIR increased (P &lt; 0.05) ADG and ADFI from d 0 to 28, and BW on d 28, 56, 76 and 97 as compared to pigs fed CON. During day 0 to 28, pigs fed NAR had a greater (P &lt; 0.05) G:F than those fed CON or VIR. Also, during d 28 to 56 pigs fed VIR had a greater (P &lt; 0.05) ADFI than pigs fed CON. Pigs fed NAR or VIR had greater (P &lt; 0.05) carcass yield than those fed CON. In Exp.2, feeding NAR increased (P &lt; 0.05) pig BW from d 54 through 96 compared to pigs fed CON or VIR. No differences (P &gt; 0.05) in ADG were detected between pigs fed VIR and CON through the first 74 d, but ADG of pigs fed VIR was similar to (P &gt; 0.05) those fed NAR from d 26 to 54. From do 0 to 109, NAR improved ADG compared to pigs fed VIR, which also had similar gain to those consuming CON (P = 0.04). Feed efficiency was similar between pigs fed NAR and VIR with pigs fed CON intermediate (P = 0.05). Pigs fed NAR had a greater (P &lt; 0.05) HCW and loin depth than those fed CON or VIR. A subtherapeutic dose of VIR showed improvements in growth performance that were similar to NAR in one experiment. Although there were differences in the magnitude of growth and carcass effects of NAR between the two studies, pigs fed NAR showed at least a tendency to have greater G:F and in some cases increased carcass weight and yield compared to pigs consuming nonmedicated feed.

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 &lt; 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 &lt; 0.05 for all). These differences resulted in heavier (P &lt; 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.

The effect of design of mono-place feeders on growth performance of finishing pigs

1991 ◽  
Vol 1991 ◽  
pp. 69-69
Author(s):  
N. Walker
Keyword(s):  
Water Supply ◽  
Growth Performance ◽  
Conversion Ratio ◽  
Feed Conversion Ratio ◽  
Finishing Pigs ◽  
Feed Conversion ◽  
Short Term ◽  
Ad Libitum ◽  
Growth Trial

When feed is offered ad libitum from hopper feeders, with water supply remote from the feeder, the feed conversion ratio with pelleted diets is improved by around 10% compared with non-pelleted diets (Patterson and Walker, 1989). This difference was reduced to around 6% when mono-place feeders with built-in water supply were used (Walker, 1990). The improved digestibility due to pelleting accounts for only 1% unit of these differences and the majority therefore appears to be due to feed wastage. A hopper feeder was developed by Baxter (1989) which minimised feed wastage of both pelleted and non-pelleted diets when assessed by short term collections of spilled feed. It was considered that a longer term growth trial would be a good indicator of the benefits of this feeder compared with other designs which had been used here in previous experiments.

Toward operationalizing the process of attention in SLA: Evidence for Tomlin and Villa's (1994) finegrained analysis of attention

1998 ◽  
Vol 19 (1) ◽  
pp. 133-159 ◽  
Author(s):  
Ronald P. Leow
Keyword(s):  
Second Language Acquisition ◽  
Repeated Measures ◽  
Empirical Support ◽  
Production Task ◽  
Short Term ◽  
Attentional Function ◽  
Fine Grained ◽  
Beginning Learners ◽  
Main Effects ◽  
Function Time

AbstractThis study investigates, from a task-based approach and at a morphological level, Tomlin and Villa's (1994) fine-grained analysis of attention in second language acquisition. Four groups of beginning learners of Spanish completed one of four crossword puzzles designed to isolate the effects of alertness, orientation, and detection. Repeated-measures ANOVAs performed on the raw scores obtained on the pretest and three posttests of a recognition and written production task revealed significant main effects for type of attentional function, time, and significant interactions. The results lend strong empirical support to Tomlin and Villa's (1994) fine-grained analysis of attention while indicating short-term effects of detection.

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