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Titolo:
Dietary formulation with rendered spent hen meals on a total amino acid versus a digestible amino acid basis
Autore:
Douglas, MW; Parsons, CM;
Indirizzi:
Univ Illinois, Dept Anim Sci, Urbana, IL 61801 USA Univ Illinois Urbana IL USA 61801 is, Dept Anim Sci, Urbana, IL 61801 USA
Titolo Testata:
POULTRY SCIENCE
fascicolo: 4, volume: 78, anno: 1999,
pagine: 556 - 560
SICI:
0032-5791(199904)78:4<556:DFWRSH>2.0.ZU;2-S
Fonte:
ISI
Lingua:
ENG
Soggetto:
BROILERS;
Keywords:
chick; amino acid digestibility; amino acid supplementation; spent hen meal;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Agriculture,Biology & Environmental Sciences
Citazioni:
16
Recensione:
Indirizzi per estratti:
Indirizzo: Parsons, CM Univ Illinois, Dept Anim Sci, 328 Mumford Hall, Urbana, IL 61801 USA Univ Illinois 328 Mumford Hall Urbana IL USA 61801 L 61801 USA
Citazione:
M.W. Douglas e C.M. Parsons, "Dietary formulation with rendered spent hen meals on a total amino acid versus a digestible amino acid basis", POULTRY SCI, 78(4), 1999, pp. 556-560

Abstract

Previous results indicated that performance of chicks fed a high level (15%) of rendered spent hen meal (SHM) was lower than performance of chicks fed a corn-soybean meal (SBM) diet. The latter difference was hypothesized tobe due to variation in digestible amino acid (AA) levels among the diets. This study evaluated diets containing SHM formulated on an equivalent totalAA basis vs an equivalent digestible AA basis compared to a corn-SBM diet. Three SHM (A, B, and C), produced in commercial rendering plants, were evaluated. Mean true digestibility coefficients (percentages) for 17 AA in SHMA, B, and C were 73.1, 63.4, and 75.5, respectively. In two chick trials, l-wk-old New Hampshire x Columbian male chicks were fed from 8 to 20 d of age a corn-SBM diet or diets containing 15% SHM formulated to be equal in total or digestible AA to the corn-SBM diet. All diets contained 21.5% CP and3,200 kcal TMEn/kg. Chicks fed 15% SHM (A, B, or C) diets formulated on a total AA basis had significantly lower (P < 0.05) weight gain and feed efficiency than chicks consuming the corn-SBM diet. Formulating diets containing SHM B or SHM C on a digestible AA basis yielded growth performance equivalent to chicks fed the corn-SBM diet. Growth performance of chicks fed the SHM A diet formulated on a digestible AA basis was greater (P < 0.05) than that obtained from the SHM A diet formulated on a total BA basis but was still lower than performance of chicks consuming the corn-SBM diet. Additional AA and energy supplementation of the SHM A diet formulated on a digestible AA basis only partially alleviated the latter performance difference. Theresults of this study indicated that formulation of diets containing SHM on a digestible AA basis is superior to formulation on a total AA basis and that 15% inclusion of two of the three SHM in chick diets had no detrimental effects on performance if the diets were formulated to contain adequate levels of digestible AA.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 23/09/20 alle ore 13:01:15