scholarly journals Effects of reduced dietary protein level and fat addition on heat production and nitrogen and energy balance in growing pigs

2001 ◽  
Vol 50 (3) ◽  
pp. 227-238 ◽  
Author(s):  
Jean Noblet ◽  
Laurent Le Bellego ◽  
Jaap Van Milgen ◽  
Serge Dubois
Keyword(s):  
Energy Balance ◽  
Heat Production ◽  
Dietary Protein ◽  
Protein Level ◽  
Growing Pigs ◽  
Dietary Protein Level

scholarly journals Nitrogen balance response to varying levels of dietary protein in slow-growing Windsnyer pigs

2021 ◽  
Vol 50 (5) ◽  
Author(s):  
V.A. Hlatini ◽  
C.N. Ncobela ◽  
M. Chimonyo
Keyword(s):  
Linear Relationship ◽  
Total Nitrogen ◽  
Nitrogen Balance ◽  
Dietary Protein ◽  
Protein Level ◽  
Growing Pigs ◽  
Nitrogen Utilization ◽  
Dietary Protein Level ◽  
Quadratic Relationship ◽  
Slow Growing

Protein requirements for slow-growing pigs have not been defined. The study was designed to determine the relationship between the level of dietary protein and nitrogen balance in slow-growing Windsnyer pigs. Thirty Windsnyer pigs with an initial bodyweight of 34.7 (SD = 0.85) kg were randomly assigned to six experimental diets containing 193, 174, 154, 135, 117, and 97 g/kg of crude protein (CP). Pigs were penned individually. There were five pigs in each diet. The faecal nitrogen output (NFO) showed a decreasing quadratic relationship with protein level. A linear relationship between protein level and urinary nitrogen excretion was observed (P =0.0001). The total nitrogen excreted showed a significant quadratic relationship to decreasing levels of CP in the diets (P =0.0001). The apparent digestibility of nitrogen had a linear relationship with dietary CP level (P =0.0005). A quadratic relationship between dietary protein level and N utilization was observed (P =0.0001). The optimum protein level for total nitrogen excreted, nitrogen utilization and biological value of feed protein were attained at 135 g/kg protein level. The efficiency of nitrogen utilization supports the low protein diet. The present results suggest reducing the dietary protein level for Windsnyer pigs to decrease amount of excreted N that is deposited into the environment.Protein requirements for slow-growing pigs have not been defined. The study was designed to determine the relationship between the level of dietary protein and nitrogen balance in slow-growing Windsnyer pigs. Thirty Windsnyer pigs with an initial bodyweight of 34.7 (SD = 0.85) kg were randomly assigned to six experimental diets containing 193, 174, 154, 135, 117, and 97 g/kg of crude protein (CP). Pigs were penned individually. There were five pigs in each diet. The faecal nitrogen output (NFO) showed a decreasing quadratic relationship with protein level. A linear relationship between protein level and urinary nitrogen excretion was observed (P =0.0001). The total nitrogen excreted showed a significant quadratic relationship to decreasing levels of CP in the diets (P =0.0001). The apparent digestibility of nitrogen had a linear relationship with dietary CP level (P =0.0005). A quadratic relationship between dietary protein level and N utilization was served (P =0.0001). The optimum protein level for total nitrogen excreted, nitrogen utilization and biological value of feed protein were attained at 135 g/kg protein level. The efficiency of nitrogen utilization supports the low protein diet. The present results suggest reducing the dietary protein level for Windsnyer pigs to decrease amount of excreted N that is deposited into the ironment. Keywords: apparent nitrogen digestibility, ideal protein level, nitrogen retention, excreted nitrogen, nitrogen utilization

scholarly journals 118 Functional amino acid supplementation, regardless of dietary protein content, improves growth performance, acute-phase response, and bacterial shedding in Salmonella-challenged pigs

2020 ◽  
Vol 98 (Supplement_4) ◽  
pp. 99-100
Author(s):  
Lucas Rodrigues ◽  
Michael O Wellington ◽  
Jack E Krone ◽  
Caroline González-Vega ◽  
John K Htoo ◽  
...  
Keyword(s):  
Amino Acid ◽  
Growth Performance ◽  
Dietary Protein ◽  
Protein Level ◽  
Interactive Effect ◽  
Average Daily Gain ◽  
Growing Pigs ◽  
Post Inoculation ◽  
Amino Acid Supplementation ◽  
Dietary Protein Level

Abstract The present study investigated the interactive effect of functional amino acid (AA) supplementation and dietary protein level on growth performance and immune status in Salmonella-challenged pigs. Thirty-two growing pigs (8 pigs/treatment; 13.9 ± 0.82 kg initial body weight) had ad libitum access to 1 of 4 experiment diets in a 2×2 factorial arrangement with factors of dietary protein (LP: Low, 16% protein vs. High: HP, 20% protein) and 2 levels of functional AA supply (AA-: basal vs. AA+: Thr, Met, and Trp provided at 20% above requirement). After 7 d of adaptation, pigs were orally inoculated with saline containing Salmonella typhimurium (ST). Performance parameters [average daily gain (ADG), feed intake, and gain:feed (GF)] were measured in the pre- and post-inoculation periods. Blood samples were collected on d0, 4 and 7 post-inoculation for serum haptoglobin and albumin analysis. Shedding of ST (d1, 2, 4 and 6 post-inoculation) and quantification in digesta (ileum, cecum and colon; d7 post-inoculation) were analyzed. There was no effect of diet on pre-inoculation performance (P > 0.05). Pigs fed AA+ showed increased ADG (0.457 vs. 0.298 ± 0.051 kg/d; P < 0.05) and a trend for improved GF (0.67 vs. 0.40 ± 0.07 kg/kg; P < 0.10) post-inoculation compared to AA- regardless of dietary protein level. Feeding AA+ increased overall albumin levels (35.7 vs. 34.2 ± 0.9 g/L; P < 0.05) and decreased overall haptoglobin levels (1.64 vs. 1.81 ± 0.12 g/L; P < 0.05) and decreased overall shedding score of ST (2.27 vs. 2.51 ± 0.09; P < 0.05) compared to AA-. The ST counts in cecal digesta increased (2.78 vs. 2.23 ± 0.18 Log10 cfu/g; P < 0.05) in pigs fed HP compared to LP-fed pigs and ST counts in colon were reduced (2.08 ± 0.18 vs. 2.61 ± 0.19 Log10 cfu/g; P < 0.05) in AA+ compared to AA- pigs. Supplementation of diets with specific functional AA improved performance and health status of pigs when exposed to an enteric disease challenge.

Dietary protein level affects nutrient digestibility and ileal microbiota structure in growing pigs

2017 ◽  
Vol 89 (3) ◽  
pp. 537-546 ◽  
Author(s):  
Kai Qiu ◽  
Xin Zhang ◽  
Ning Jiao ◽  
Doudou Xu ◽  
Caiyun Huang ◽  
...  
Keyword(s):  
Dietary Protein ◽  
Protein Level ◽  
Nutrient Digestibility ◽  
Growing Pigs ◽  
Dietary Protein Level ◽  
Microbiota Structure
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