Catalogo Articoli (Spogli Riviste)

OPAC HELP

Titolo:
Effects of dietary threonine on performance, plasma parameters and immune function of growing pigs
Autore:
Li, DF; Xiao, CT; Qiao, SY; Zhang, JH; Johnson, EW; Thacker, PA;
Indirizzi:
Univ Saskatchewan, Dept Anim Sci, Saskatoon, SK S7N 5B5, Canada Univ Saskatchewan Saskatoon SK Canada S7N 5B5 skatoon, SK S7N 5B5, Canada PMX Technol, Mcleansboro, IL 62859 USA PMX Technol Mcleansboro IL USA 62859 X Technol, Mcleansboro, IL 62859 USA China Agr Univ, Beijing 100094, Peoples R China China Agr Univ Beijing Peoples R China 100094 ng 100094, Peoples R China
Titolo Testata:
ANIMAL FEED SCIENCE AND TECHNOLOGY
fascicolo: 3-4, volume: 78, anno: 1999,
pagine: 179 - 188
SICI:
0377-8401(199904)78:3-4<179:EODTOP>2.0.ZU;2-I
Fonte:
ISI
Lingua:
ENG
Soggetto:
AMINO-ACID SUPPLEMENTATION; SOYBEAN MEAL DIETS; LOW-PROTEIN; LYSINE REQUIREMENT; WEIGHING 5; 15 KG; METHIONINE; SWINE; 20-KILOGRAM; RESPONSES;
Keywords:
threonine; growing pigs; growth performance; plasma constituents; immunity;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Agriculture,Biology & Environmental Sciences
Citazioni:
33
Recensione:
Indirizzi per estratti:
Indirizzo: Thacker, PA Univ Saskatchewan, Dept Anim Sci, Saskatoon, SK S7N 5B5, Canada Univ Saskatchewan Saskatoon SK Canada S7N 5B5 S7N 5B5, Canada
Citazione:
D.F. Li et al., "Effects of dietary threonine on performance, plasma parameters and immune function of growing pigs", ANIM FEED S, 78(3-4), 1999, pp. 179-188

Abstract

Sixty-four growing pigs (Beijing Black x Landrace x Duroc), weighing an average of 17.5 +/- 0.5 kg, were divided into four groups with four pens per treatment (two gilts and two castrates per pen) and fed diets containing various levels of threonine to determine its effects on performance, plasma levels of free amino acids, plasma urea nitrogen and immune function during a 4 week trial. The basal diet was based on maize and soybean meal, supplemented with rapeseed meal and cottonseed meal, and contained 9.2 g kg(-1) lysine and 5.9 g kg(-1) threonine. L-threonine was added to the basal diet toprovide 6.8, 7.7 and 8.9 g kg(-1) threonine in the remaining three diets. On day 7, all pigs were injected with either Bovine Serum Albumin (BSA) or Swine Fever Attenuated Vaccine (SFAV) to determine humoral antibody response. The addition of threonine improved weight gain with the quadratic and cubic polynomial contrasts being significant (p < 0.05). Feed conversion was also significantly improved with the linear, quadratic and cubic polynomialcontrasts being significant (p < 0.01). The highest weight gain occurred at 6.8 g kg(-1) threonine and the best feed conversion at 8.9 g kg(-1) threonine. The concentration of plasma urea nitrogen decreased (p < 0.01) and reached a plateau when dietary threonine increased from 5.9 to 6.8 g kg(-1). Serum threonine increased (p < 0.01) and serum lysine decreased (p < 0.01) as dietary threonine increased, with both amino acids showing sharp inflection points at 6.8 g kg(-1) dietary threonine. Increasing dietary threonine levels increased serum IgG concentration (p < 0.01) and anti-BSA antibody (p < 0.01) level. In conclusion, although maximum growth rare of 17-31 kg pigs occurred at a dietary threonine level of 6.8 g kg(-1), higher threonine levels were needed to maximize humoral antibody production and Ige levels. (C) 1999 Elsevier Science B.V. All rights reserved.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 25/09/20 alle ore 22:22:40