scholarly journals 139 Digestibility of phosphorus in heat-treated dry extruded-expelled soybean meal and solvent-extracted and expeller-extracted canola meal fed to growing pigs

2020 ◽  
Vol 98 (Supplement_4) ◽  
pp. 105-105
Author(s):  
Jinyoung Lee ◽  
Charles Martin Nyachoti
Keyword(s):  
Heat Treatment ◽  
Soybean Meal ◽  
Energy Requirement ◽  
Sole Source ◽  
Growing Pigs ◽  
Canola Meal ◽  
Randomized Design ◽  
Heat Treated ◽  
Completely Randomized Design ◽  
Maintenance Energy Requirement

Abstract Although heat treatment affects digestibility of amino acids in feed ingredients, there is less information as to whether such an effect also applies to minerals. Therefore, the objective of this research was to investigate the effects of heat treatment on apparent (ATTD) and standardized total tract digestibility (STTD) of P in dry extruded-expelled soybean meal (DESBM), solvent-extracted canola meal (SCM), and expeller-extracted canola meal (ECM) fed to growing pigs. A total of 36 pigs (19.0 ± 1.0 kg) were assigned to 1 of 6 diets in a completely randomized design to give 6 replicates per diet. Pigs were individually housed in metabolism crates for 12 d, including 7 d for adaptation and 5 d for total collection of feces. The experimental diets were formulated to contain non-heated or heat-treated DESBM, SCM, and ECM as the sole source of P. Pigs were offered their daily ration at 2.8 times their maintenance energy requirement. Data were analyzed as a 3 × 2 factorial arrangement using the PROC MIXED of SAS with ingredients, heat treatment, and their interaction; however, no interaction was observed for any variable. Pigs fed the DESBM diet had a higher (P < 0.05) ATTD and STTD of P than pigs fed SCM and ECM diets. The ATTD and STTD of P in heat treated samples were higher (P < 0.05) than in non-heated samples. In the heat-treated samples, the values of STTD of P were 49.4, 23.2, and 25.8% for DESBM, SCM, and ECM, respectively. Respective values for STTD of P in non-heated DESBM, SCM, and ECM were 48.5, 20.2, and 22.5%. The ATTD of Ca in non-heat-treated samples was lower (P < 0.05) compared to the values for heat-treated samples. In conclusion, heat treatment increased ATTD and STTD of P in DESBM, SCM, and ECM fed to growing pigs.

Heat processing increased the digestibility of phosphorus in soybean expeller, canola meal, and canola expeller fed to growing pigs

2021 ◽  
Author(s):  
Jinyoung Lee ◽  
Charles Martin Nyachoti
Keyword(s):  
Heat Treatment ◽  
Energy Requirement ◽  
Sole Source ◽  
Growing Pigs ◽  
Heat Processing ◽  
Canola Meal ◽  
Initial Body Weight ◽  
Randomized Design ◽  
Completely Randomized Design ◽  
Maintenance Energy Requirement

Abstract It is hypothesized that heat processing may increase P digestibility in different protein sources fed to growing pigs. A study was conducted to determine the apparent total tract digestibility (ATTD) and standardized total tract digestibility (STTD) of P in soybean expeller (SBE) produced from oil extraction using dry extrusion and expelling and to investigate the effects of heat treatment on the ATTD and STTD of P in SBE, canola meal (CM), and canola expeller (CE) fed to growing pigs. Thirty-six growing barrows with an initial body weight of 19.0 ± 1.0 kg (mean ± SD) were assigned to 1 of 6 experimental diets in a completely randomized design to give 6 replicates per diet. The experimental design was a 3 × 2 factorial arrangement including three oilseed meals with or without heat treatment. The diets were formulated to contain non-autoclaved or autoclaved (at 121°C for 60 min) SBE, CM, and CE as the sole source of P. Limestone was included in diets to maintain a Ca:total P ratio of 1.3:1 across diets. Pigs were individually housed in metabolism crates for 12 days, including 7 days for adaptation and 5 days for total collection of feces. Pigs were offered their daily ration at 2.8 times their maintenance energy requirement. Data were analyzed using the PROC MIXED of SAS. Heat treatment increased (P < 0.05) the ATTD and STTD of P. Pigs fed the SBE diets had greater (P < 0.05) ATTD and STTD of P than pigs fed CM and CE diets. For the autoclaved ingredients, the values of STTD of P were 49.4, 23.2, and 25.8% for SBE, CM, and CE, respectively, whereas STTD of P in non-autoclaved SBE, CM, and CE were 48.5, 20.2, and 22.5%. Heat treatment increased (P < 0.05) the ATTD of Ca. In conclusion, heat treatment increased ATTD and STTD of P and ATTD of Ca in SBE, CM, and CE fed to growing pigs. The ATTD and STTD of P in SBE determined in the current study were 41.0 and 48.5%, respectively.

scholarly journals PSI-11 Standardized total tract digestibility of phosphorus in high-protein sunflower meal fed to growing pigs with or without phytase supplementation

2019 ◽  
Vol 97 (Supplement_3) ◽  
pp. 292-292
Author(s):  
Jinyoung Lee ◽  
Jong Woong Kim ◽  
C Martin Nyachoti
Keyword(s):  
Energy Requirement ◽  
Basal Diet ◽  
Experimental Period ◽  
Growing Pigs ◽  
High Protein ◽  
Sunflower Meal ◽  
P Loss ◽  
Randomized Design ◽  
P Utilization ◽  
Maintenance Energy Requirement

Abstract The objective of this research was to estimate the apparent (ATTD) and standardized (STTD) total tract digestibility of phosphorus (P) in high-protein sunflower meal (HP-SFM) fed to growing pigs with or without phytase supplementation. Twenty-four individually-housed pigs (19.5 ± 1.9 kg) were assigned to 1 of 4 diets in a completely randomized design to give 6 replicates per diet. The experimental diets consisted of a corn-soybean meal-based basal diet and a diet containing 30% of HP-SFM, both of which were fed without or with phytase supplementation at 500 phytase units/kg. Pigs were given their daily feed allowance at 2.8 times the maintenance energy requirement. The experimental period lasted for 15 d including 10 d for adaptation to experimental diets and 5 d for total collection of feces. The STTD of P was calculated by correcting the ATTD of P with the basal endogenous P loss, which was assumed to be 190 mg/kg dry matter intake. Phytase supplementation decreased (P < 0.05) both calcium (Ca; 1.34 vs. 2.14%) and P concentrations in feces (3.23 vs. 4.44%) in HP-SFM including diets. Addition of dietary phytase to the HP-SFM-contained diets also reduced (P < 0.05) daily Ca output from 3.08 to 1.86 g/d and daily P output from 6.41 to 4.51 g/d. The ATTD of Ca and P and STTD of P increased (P < 0.05) by providing phytase in both basal and HP-SFM including diets. The ATTD and STTD of P in HP-SFM were 18.4 and 19.3% for without phytase and 36.5 and 37.5% for with phytase, respectively, and there was a tendency (P = 0.063) for phytase supplementation to increase P utilization in HP-SFM fed to growing pigs. The standardized total tract digestible P content in HP-SFM was calculated at 3.61 g/kg.

scholarly journals Growth performance, morphometric analysis of the intestinal mucosa and thyroid of broiler fed canola meal

2018 ◽  
Vol 70 (1) ◽  
pp. 187-194
Author(s):  
P.O. Moraes ◽  
L. Novelini ◽  
E.L. Krabbe ◽  
V.L. Kawski ◽  
J.K. Nunes ◽  
...  
Keyword(s):  
Intestinal Mucosa ◽  
Soybean Meal ◽  
Liver Steatosis ◽  
Relative Weight ◽  
Follicular Epithelium ◽  
Canola Meal ◽  
Liver Histopathology ◽  
Follicle Diameter ◽  
Randomized Design ◽  
Completely Randomized Design

ABSTRACT The aim of this study was to evaluate the effect of replacing soybean meal with canola meal in broiler diets on performance, liver histopathology, morphometry of the intestinal mucosa and thyroid. One-day-old Cobb chicks (n=300) were distributed in a completely randomized design, with increasing levels of replacement of soybean meal with canola meal (0, 25, 50, 75 and 100%) and 6 repetitions of 10 birds each. Weight gain decreased linearly (P< 0.05) with increasing levels of inclusion of canola meal, in all stages. Villus height in the duodenum and jejunum linearly decreased (P< 0.05). Follicle diameter and thyroid follicular epithelium height increased linearly with increasing levels of canola meal (P< 0.05). Similarly, there was an increase in relative weight of liver and heart, and liver steatosis in the highest levels of replacement. In conclusion, the replacement of soybean meal with canola meal can reduce performance, adversely affecting the thyroid, liver and the morphometric characteristics in the duodenum and jejunum.

514 Late-Breaking: Effects of Feeding a High Canola Meal-containing Diet and Multi-carbohydrase Supplementation on Growth Performance and Intestinal Ecology of Piglets

2021 ◽  
Vol 99 (Supplement_3) ◽  
pp. 206-207
Author(s):  
Debora Holanda ◽  
Alemu Regassa ◽  
Robert Patterson ◽  
Martin Nyachoti
Keyword(s):  
Growth Performance ◽  
Soybean Meal ◽  
Relative Proportion ◽  
Isobutyric Acid ◽  
Canola Meal ◽  
Experimental Unit ◽  
Randomized Design ◽  
Completely Randomized Design ◽  
Intestinal Ecology ◽  
Microbiome Data

Abstract The objective was to investigate the effects of a high canola meal-containing diet and multi-carbohydrase supplementation on growth performance and intestinal pH, short-chain fatty acid (SCFA) profile, and microbiome in weaned piglets. Twenty-four piglets (7.46 ± 0.23 kg BW) were individually assigned to 1 of 3 diets in a completely randomized design. Diets were fed for 21 d: SB, corn and soybean meal-based diet; CM, 25% canola meal substituting soybean meal and adjusted to meet energy and nutrient requirements of piglets (NRC, 2012); and CM+E, CM supplemented with multi-carbohydrase (0.01%). Feed disappearance and BW were recorded weekly. On d 21, piglets were euthanized to assess digesta pH, SCFA profile, and gut microbiome. Data were analyzed using the MIXED procedure of SAS using the piglet as the experimental unit. There were no differences (P &gt; 0.10) in growth performance and digesta pH. Piglets fed CM+E tended to (P = 0.051) or had significantly lower (P &lt; 0.05) butyric acid in the cecum than piglets fed CM and SB, respectively. Piglets fed SB had higher (P &lt; 0.05) isobutyric acid in the colon than piglets fed CM+E. Piglets fed SB and CM tended to have higher (P &lt; 0.05) isovaleric acid in the colon than piglets fed CM+E. Piglets fed SB tended to have lower (P &lt; 0.10) proportion of Bifidobacteria, and had lower (P &lt; 0.05) Enterobacteriaceae, Enterococcus, and Lactobacillus than piglets fed CM. Piglets fed CM+E tended to have lower (P &lt; 0.10) Bifidobacteria and higher Clostridium XIVa than piglets fed CM, and had lower (P &lt; 0.05) Enterococcus, but higher (P &lt; 0.05) Lactobacillus than piglets fed CM. In conclusion, feeding 25% of canola meal in substitution to soybean meal with or without multi-carbohydrase supplementation changed the intestinal environment by modifying SCFA profile and relative proportion of microbiome, but without affecting digesta pH or growth performance in nursery piglets.

scholarly journals 170 Energy values and digestibility of amino acids in dried yeast and soybean meal fed to pigs

2020 ◽  
Vol 98 (Supplement_3) ◽  
pp. 61-61
Author(s):  
Chan Sol Park ◽  
Ayodeji S Aderibigbe ◽  
Gary Hayen ◽  
Olayiwola Adeola
Keyword(s):  
Amino Acids ◽  
Soybean Meal ◽  
Block Design ◽  
Basal Diet ◽  
Sole Source ◽  
Metabolizable Energy ◽  
Canola Meal ◽  
Ileal Digestibility ◽  
Randomized Complete Block Design ◽  
Blocking Factors

Abstract Two experiments were conducted to evaluate the digestible energy (DE), metabolizable energy (ME), and standardized ileal digestibility (SID) of amino acids (AA) in dried yeast (DY) and soybean meal (SBM) fed to pigs. In Exp. 1, 30 barrows with an initial body weight (BW) of 20.7 ± 1.01 were assigned to 5 diets in a randomized complete block design with period and BW as blocking factors. A basal diet was prepared to contain corn, canola meal, and soybean oil as energy-contributing ingredients. Four additional diets were prepared by adding 5 or 10 g/kg DY or SBM at the expense of energy-contributing ingredients in the basal diet to estimate the DE and ME in test ingredients by regression analysis. On a dry matter basis, estimated DE and ME in DY were 4,022 and 3,352 kcal/kg, respectively, and those in SBM were 3,876 and 3,601kcal/kg, respectively. There was no difference in estimated DE or ME between DY and SBM. In Exp. 2, 21 barrows (initial BW = 20.0 ± 1.31 kg) surgically fitted with T-cannulas at the distal ileum were assigned to 3 diets in a randomized complete block design with BW as a blocking factor. Two diets were prepared to contain DY or SBM as the sole source of nitrogen, and a nitrogen-free diet was prepared to determine the basal ileal endogenous losses of AA. The SID of AA, except for Gly and Pro, in SBM were greater (P &lt; 0.05) than in DY. The SID of indispensable AA in DY ranged from 64.7% for Thr to 86.1% for Arg, whereas those in SBM ranged from 84.8% for Thr to 92.3% for Arg. In conclusion, energy values in DY was comparable with SBM, but the SID of most AA in DY were less than in SBM.

Energy content of intact and heat-treated dry extruded-expelled soybean meal fed to growing pigs

2021 ◽  
Author(s):  
Bonjin Koo ◽  
Olumide Adeshakin ◽  
Charles Martin Nyachoti
Keyword(s):  
Heat Production ◽  
Soybean Meal ◽  
Energy Content ◽  
Basal Diet ◽  
Growing Pigs ◽  
Metabolizable Energy ◽  
Energy Utilization ◽  
Experimental Unit ◽  
Net Energy ◽  
Heat Treated

Abstract An experiment was performed to evaluate the energy content of extruded-expelled soybean meal (EESBM) and the effects of heat treatment on energy utilization in growing pigs. Eighteen growing barrows (18.03 ± 0.61 kg initial body weight) were individually housed in metabolism crates and randomly allotted to one of three dietary treatments (six replicates/treatment). The three experimental diets were: a corn-soybean meal-based basal diet and two test diets with simple substitution of a basal diet with intact EESBM or heat-treated EESBM (heat-EESBM) at a 7:3 ratio. Intact EESBM was autoclaved at 121°C for 60 min to make heat-treated EESBM. Pigs were fed the experimental diets for 16 d, including 10 d for adaptation and 6 d for total collection of feces and urine. Pigs were then moved into indirect calorimetry chambers to determine 24-h heat production and 12-h fasting heat production. The energy content of EESBM was calculated using the difference method. Data were analyzed using the Mixed procedure of SAS with the individual pig as the experimental unit. Pigs fed heat-EESBM diets showed lower (P &lt; 0.05) apparent total tract digestibility of dry matter (DM), gross energy, and nitrogen than those fed intact EESBM. A trend (P ≤ 0.10) was observed for greater heat increments in pigs fed intact EESBM than those fed heat-EESBM. This resulted in intact EESBM having greater (P &lt; 0.05) digestible energy (DE) and metabolizable energy (ME) contents than heat-EESBM. However, no difference was observed in net energy (NE) contents between intact EESBM and heat-EESBM, showing a tendency (P ≤ 0.10) toward an increase in NE/ME efficiency in heat-EESBM, but comparable NE contents between intact and heat-EESBM. In conclusion, respective values of DE, ME, and NE are 4,591 kcal/kg, 4,099 kcal/kg, and 3,189 kcal/kg in intact EESBM on a DM basis. It is recommended to use NE values of feedstuffs that are exposed to heat for accurate diet formulation.

scholarly journals PSI-12 Effect of a carbohydrase mixture on apparent and standardized ileal digestibility of amino acids in dry extruded-expelled soybean meal fed to growing pigs

2019 ◽  
Vol 97 (Supplement_3) ◽  
pp. 292-293
Author(s):  
Jichen Song ◽  
Ahmed Aljuobori ◽  
C Martin Nyachoti ◽  
Gustavo A Mejicanos
Keyword(s):  
Soybean Meal ◽  
Mixed Model ◽  
Latin Square ◽  
Experimental Period ◽  
Sole Source ◽  
Antinutritional Factors ◽  
Nutrient Digestibility ◽  
Growing Pigs ◽  
Mean Values ◽  
Ileal Digestibility

Abstract Heat treatment could effectively decrease the antinutritional factors in soybean during meal processing. One such progress is the combination of extrusion with expelling, which produces the dry extruded-expelled soybean meal (DESBM), and there is a great interest in exploring its utilization as a dietary ingredient for swine. Thus, eight ileal-cannulated barrows (initial BW = 30 ± 1.3 kg) were used to determine the ileal amino acid (AA) digestibility of DESBM fed to growing pigs with or without multi-carbohydrase (MC) supplementation. Pigs were randomly assigned to 1 of 4 treatments in a replicated 4 × 4 Latin square design to give eight observations per treatment. The experimental diets were formulated to contain one of the two batches of DESBM (DESBM-1 and DESBM-2) as the sole source of protein. All diets contained titanium dioxide (0.3%) as an indigestible marker to calculate nutrient digestibility. Each experimental period lasted for seven days, and ileal digesta samples were collected on d 6 and d 7. The standardized ileal digestibility (SID) of AA were calculated using published mean values to estimate ileal endogenous AA losses. Data were analyzed using the mixed model procedures of SAS, and the final model had treatment, batch, and the interaction between treatment and batch as the main effects. In general, the SID of AA in DESBM-1 and DESBM-2 were not different, such as Ile, Lys, Met, Thr, and Val, which averaged 88.97%, 89.77%, 89.08%, 84.38%, and 86.85% respectively. There were no effects of MC supplementation on AID and SID of AA digestibility in DESBM except for the AID of Trp (P &lt; 0.05). Also, there were no interaction effects of MC supplementation and batch on AA digestibility in DESBM. In conclusion, enzyme supplementation did not improve the AID and SID of AA in DESBM fed to growing pigs.

scholarly journals 166 Fate of pentoses in the small intestine and hindgut of growing pigs

2019 ◽  
Vol 97 (Supplement_2) ◽  
pp. 95-95 ◽  
Author(s):  
Jerubella J Abelilla ◽  
Hans H Stein
Keyword(s):  
Fatty Acids ◽  
Small Intestine ◽  
Corn Starch ◽  
Growing Pigs ◽  
Energy Utilization ◽  
Distal Ileum ◽  
Energy Status ◽  
Randomized Design ◽  
Completely Randomized Design

Abstract Two experiments were conducted to test the hypotheses that pentoses absorbed from the small intestine of pigs reduce energy utilization and that pentoses that reach the hindgut are fermented. In Exp. 1, 24 barrows (9.95 ± 0.51 kg) with a T-cannula in the distal ileum were allotted to a completely randomized design with 3 diets that contained 15% glucose, 15% xylose, or 15% arabinose. Ileal digesta, feces, and urine were collected from all pigs. Data were analyzed via ANOVA using the Proc Mixed Procedure of SAS. No differences among diets were observed for apparent total tract digestibility of GE or for DE, but ME in xylose and arabinose diets was reduced (P < 0.01) compared with the glucose diet (Table 1) indicating that xylose and arabinose that are absorbed from the small intestine are excreted in the urine. In Exp. 2, 21 barrows (18.02 ± 1.1 kg) were allotted to a completely randomized design with 3 treatments and 7 pigs per treatment. A diet based on corn starch, casein, and 15% glucose was fed for 11 d. On d 4 through 11, saline, xylose, or arabinose (3% of the daily feed) was infused into the cecum of pigs via an ileal cannula, and feces and urine were collected. Data were analyzed as in Exp. 1. Infused xylose or arabinose was not detected in feces of the pigs infused with pentoses indicating that pentoses are fully fermented in the hindgut (Table 1). In conclusion, dietary free pentoses are absorbed prior to the end of the small intestine, but partially excreted in the urine, and therefore may reduce energy utilization. If pentoses are liberated in the hindgut, they may contribute to the energy status of the pig by being fermented with a subsequent absorption of short chained fatty acids.

scholarly journals Economic analysis of the finishing of lambs under confinement conditions using licuri cake ( Syagrus coronata Mart. Becc.)

2019 ◽  
Vol 20 ◽  
Author(s):  
Jonival Barreto COSTA ◽  
Ronaldo Lopes OLIVEIRA ◽  
Thadeu Mariniello SILVA ◽  
Ossival Lolato RIBEIRO ◽  
Rebeca Dantas Xavier RIBEIRO ◽  
...  
Keyword(s):  
Soybean Meal ◽  
Dry Matter ◽  
Randomized Design ◽  
Economic Parameters ◽  
Completely Randomized Design ◽  
The Impact ◽  
Operation Cost ◽  
Different Levels ◽  
Ground Corn ◽  
Corn Grain

SUMMARY The present study endeavors to determine the impact of the inclusion of licuri tart in the diet of finishing lambs, Santa Inês mestizos, by evaluating the economic parameters. For this purpose, a total of 44 lambs, including both uncastrated as well as vaccinated and wormed lambs, with an average age of six months and a mean body weight of 21.2 kg ± 2.7 kg, were employed. Initially, the lambs were fed on the diet which consisted of 40% Tifton-85 hay and 60% of a concentrated mixture, mainly composed of ground corn grain, soybean meal, mineral premix, being further followed by the inclusion of the licuri cake at four different levels (a) 0.0, (b) 8.0,(c) 16.0, and (d) 24% with respect to the dry matter. Principally, the soybean meal and milled corn were replaced by the licuri cake with these levels, thereby constituting four treatments and 11 replicates (11 lambs per treatment) in a completely randomized design. Further, for subjecting the lambs to the above mentioned four different levels of treatment, the lambs were confined for 70 days. The analysis of various economic parameters revealed that upon including the licuri cake up to the level of 24%, the operation cost decreases, which in turn results in higher profitability. However, its cost at the time of use will eventually determine its use for feeding lambs, because of the possible price variations of the ingredients used to formulate the diets along with the model of production of the rural property.

scholarly journals Standardized total tract digestibility of calcium varies among sources of calcium carbonate, but not among sources of dicalcium phosphate, but microbial phytase increases calcium digestibility in calcium carbonate1

2019 ◽  
Vol 97 (8) ◽  
pp. 3440-3450 ◽  
Author(s):  
Su A Lee ◽  
L Vanessa Lagos ◽  
Carrie L Walk ◽  
Hans H Stein
Keyword(s):  
Energy Requirement ◽  
Basal Diet ◽  
Growing Pigs ◽  
Dicalcium Phosphate ◽  
Adaptation Period ◽  
Randomized Design ◽  
Microbial Phytase ◽  
Formulated Feed ◽  
Ca Carbonate ◽  
Different Sources

Abstract Two experiments were conducted to test the hypothesis that standardized total tract digestibility (STTD) of Ca and the response to microbial phytase is constant among different sources of Ca carbonate and that the STTD of Ca is constant among different sources of dicalcium phosphate (DCP) when fed to growing pigs. In Exp. 1, 80 pigs (initial BW: 19.0 ± 1.9 kg) were randomly allotted to 10 diets and 2 blocks with 4 pigs per diet in each block. Four sources of Ca carbonate were used, and each source was included in a diet without microbial phytase and a diet with microbial phytase (500 units/kg diet). Two Ca-free diets without or with microbial phytase were also formulated. Feed allowance was 2.7 times the maintenance energy requirement for ME and daily feed allotments were divided into 2 equal meals. The initial 4 d of each period were considered the adaptation period to the diets followed by 4 d of fecal collection using the marker-to-marker procedure. Pigs fed diets containing exogenous phytase had lower (P < 0.05) basal endogenous loss of Ca compared with pigs fed diets containing no phytase. There were no interactions between phytase and source of Ca carbonate. Values for STTD of Ca were greater (P < 0.05) for diets containing microbial phytase (77.3% to 85.4%) compared with diets without exogenous phytase (70.6% to 75.2%), and values for STTD of Ca differed (P < 0.05) among the 4 sources of Ca carbonate. In Exp. 2, 40 pigs (initial BW: 14.9 ± 1.3 kg) were allotted to a completely randomized design with 5 diets and 8 replicate pigs per diet. A basal diet in which all Ca was supplied by Ca carbonate was formulated. Three diets were formulated by adding 3 sources of DCP to the basal diet and a Ca-free diet was also used. Feeding and collection methods were as described for Exp. 1. Results indicated that values for STTD of Ca and ATTD of P were not different among diets, indicating that under the conditions of this experiment, the digestibility of Ca and P in DCP appears to be constant regardless of origin of DCP. In conclusion, use of microbial phytase reduces the basal endogenous loss of Ca and increases Ca digestibility in Ca carbonate. The STTD of Ca varies among sources of Ca carbonate, regardless of phytase inclusion, but that appears not to be the case for the STTD of Ca in different sources of DCP.

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