ArticlePoultry science2019
Supplementing glycine, serine, and threonine in low protein diets for meat type chickens.
Article in Poultry science, 2019. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 19 papers.
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The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.
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Who cites it
19 citing papers in PubMed, 57 citations in OpenAlex.
- The Effects of Arginine, Guanidinoacetic Acid and Citrulline Supplementation to Reduced Protein Diets for Aged Laying Hens.Animals : an open access journal from MDPI · 2026Article
- Recent advances in protein and amino acid nutritional dynamics in relation to performance, health, welfare, and cost of production.Poultry science · 2025Review
- Integrated metabolomics and intestinal microbiota analysis to reveal anti-post-weaning diarrhea mechanisms of Modified Yupingfeng Granule in Rex rabbits.Frontiers in microbiology · 2025Article
- Interaction effects of glycine equivalent and standardized ileal digestible threonine in low protein diets for broiler grower chickens.Animal bioscience · 2024Article
- Growth performance and nitrogen excretion of broiler chickens fed low protein diets supplemented with crystalline amino acids.Journal of animal science and technology · 2024Article
- Effects of different dietary threonine and glycine supplies in broilers fed low-protein diets.Frontiers in veterinary science · 2024Article
- The future of feed formulation for poultry: Toward more sustainable production of meat and eggs.Animal nutrition (Zhongguo xu mu shou yi xue hui) · 2023Review
- The influence of non-bound amino acid inclusions and starch-protein digestive dynamics on growth performance of broiler chickens offered wheat-based diets with two crude protein concentrations.Animal nutrition (Zhongguo xu mu shou yi xue hui) · 2023Article
- Effects of L-arginine, guanidinoacetic acid and L-citrulline supplementation in reduced-protein diets on bone morphology and mineralization of laying hens.Animal nutrition (Zhongguo xu mu shou yi xue hui) · 2023Article
- Different amino acid supplementation patterns in low-protein diets on growth performance and nitrogen metabolism of goslings from 1 to 28 days of age.Poultry science · 2023Article
- Influence of increasing glycine concentrations in reduced crude protein diets fed to broilers from 0 to 48 days.Poultry science · 2022Article
- Responses of Combined Non-starch Polysaccharide Enzymes and Protease on Growth Performance, Meat Quality, and Nutrient Digestibility of Yellow-Feathered Broilers Fed With Diets With Different Crude Protein Levels.Frontiers in veterinary science · 2022Article
- Article
- Effects of L-arginine and L-citrulline supplementation in reduced protein diets for broilers under normal and cyclic warm temperature.Animal nutrition (Zhongguo xu mu shou yi xue hui) · 2021Article
- Response of laying hens to l-arginine, l-citrulline and guanidinoacetic acid supplementation in reduced protein diet.Animal nutrition (Zhongguo xu mu shou yi xue hui) · 2021Article
- Production performance and plasma metabolite concentrations of broiler chickens fed low crude protein diets differing in Thr and Gly.Animal nutrition (Zhongguo xu mu shou yi xue hui) · 2021Article
- Progress towards reduced-crude protein diets for broiler chickens and sustainable chicken-meat production.Journal of animal science and biotechnology · 2021Review
- Synthetic and Crystalline Amino Acids: Alternatives to Soybean Meal in Chicken-Meat Production.Animals : an open access journal from MDPI · 2020Review
- Reducing protein and supplementing crystalline amino acids, to alter dietary amino acid profiles in birds challenged for subclinical necrotic enteritis.Poultry science · 2020Article
Corrections and comments
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Authors and funding
6 authors at 2 institutions in 1 country.
Funding
No grant is acknowledged in the PubMed record.
Abstract
Reducing dietary protein has been of interest to the global poultry industry to improve bird health, welfare, and industry sustainability. Low protein (LP) diets are typically glycine (Gly) deficient and produce poor performance. Supplementing the diet with Gly or precursors of Gly can overcome this deficiency. A feeding experiment was conducted with 330 Ross 308 off-sex males across 5 treatments in a randomized design using 11 birds per pen replicated 6 times. Grower and finisher treatments were fed from day 7 to 21 and day 21 to 35, respectively. The objective was to test the efficacy of supplementation with Gly and Gly equivalents (Glyequiv), serine (Ser) and threonine (Thr), in plant-based LP diets on bird performance against a standard protein (SP) diet containing meat and bone meal. Glycine, Ser, or Thr were supplemented on Glyequiv basis to an approximately 3% lower CP diet to achieve the same digestible Gly and Ser level as the SP diet. Nitrogen efficiency, serum uric acid, blood plasma amino acids (AA) and AA digestibility were also investigated to monitor potential metabolic effects. Birds fed the LP diet were only 3.3% lower in final body weight than the SP treatment (2,556 vs. 2,641 g) while the supplementation of Gly or Ser had no effect. Supplementation of Thr reduced final body weight by 9.5% (P < 0.05). Reducing CP increased N efficiency by 9.6% (P < 0.05) and decreased blood serum uric acid by 26.9% (P < 0.001) in the finisher treatments. Glycine and Ser supplementation in LP diets had no effect on these parameters. The LP diet reduced AA digestibility and blood plasma AA while the supplementation with either Gly, Ser, or Thr increased overall AA digestibility (P < 0.05) but had no overall effect on blood plasma AA. Further research is required into Gly metabolism; however, Thr supplementation depressed growth and therefore is not feasible to cover Gly deficiency in LP diets on a Glyequiv basis.
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