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Titolo:
Effect of different dietary CP levels on the growth, nutrient utilization and carcass characteristics of finishing barrows and gilts reared in phase feeding regimen.
Autore:
Lee, JH; Kim, JD; Kim, JH; Kim, IH; Han, IK;
Indirizzi:
Seoul Natl Univ, Coll Agr & Life Sci, Dept Anim Sci & Technol, Suwon 441744, South Korea Seoul Natl Univ Suwon South Korea 441744 hnol, Suwon 441744, South Korea
Titolo Testata:
JOURNAL OF APPLIED ANIMAL RESEARCH
fascicolo: 2, volume: 19, anno: 2001,
pagine: 145 - 163
SICI:
0971-2119(200106)19:2<145:EODDCL>2.0.ZU;2-0
Fonte:
ISI
Lingua:
ENG
Soggetto:
LYSINE; PIGS; PERFORMANCE; REQUIREMENTS; KILOGRAMS; SWINE;
Keywords:
phase feeding; growth performance; nutrient digestibility; excretion; sexes; carcass characteristics; finishing pigs;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Agriculture,Biology & Environmental Sciences
Citazioni:
21
Recensione:
Indirizzi per estratti:
Indirizzo: Lee, JH Seoul Natl Univ, Coll Agr & Life Sci, Dept Anim Sci & Technol, Suwon 441744, South Korea Seoul Natl Univ Suwon South Korea 441744 won 441744, South Korea
Citazione:
J.H. Lee et al., "Effect of different dietary CP levels on the growth, nutrient utilization and carcass characteristics of finishing barrows and gilts reared in phase feeding regimen.", J APPL AN R, 19(2), 2001, pp. 145-163

Abstract

This experiment was to investigate the effects of different crude protein (CP) sequences on growth performance, nutrients utilization and carcass characteristics of finishing barrows and gilts under three phase feeding regimen. A total of 120 finishing pigs (LandracexLarge WhitexDurox) averaging 53.3 +/-0.91 kg of body weight and 30 pigs (averaging 52.5 +/-0.57 81.8 +/-0.79 and. 100.7 +/-0.89, respectively) were assigned to the feeding and the metabolic trial, respectively. Experiment was arranged as a 2x3 factorial design, barrows and gilts and three dietary treatments. Each treatment had four replicates with five pigs per replicate. Finishing period (53 to 107 kg)was divided into three phases (53 to 69 kg, 69 to 88 kg and 88 to 107 kg). Dietary treatments included 1) 17%-15%-13% (high CP), 2) 16%-14%-12% (medium CP), 3) 15%-13%-11% (low CP) sequence for finishing period. During the overall experimental period (53 to 107 kg), there was no interaction betweensexes and dietary CP levels on growth performances. Barrows consumed more feed (p <0.01) and grew faster (p <0.01) than gilts did. ADG of pigs fed onhigh dietary CP feeding group was improved significantly than that of pigsfed on low dietary CP feeding group (p <0.05). Average values of essentialamino acids (EAA), non-essential amino acids (NEAA) and total amino acids digestibilities were generally not influenced by dietary CP levels and sexes. However, fecal daily nitrogen (N) excretion averaged over all periods was significantly higher in high dietary CP feeing group than in medium and low dietary CP feeding groups (p <0.05). Averaged blood urea nitrogen (BUN) concentration was greater (p <0.05) in barrows than in gilts and was increased as dietary CP concentration increased (p <0.05). Backfat (BF) thicknesswas greater in barrows than in gilts (p <0.05). Longissimus muscle area (LEA) was greater in gilts than in barrows (p <0.01) and was greater in high and medium dietary CP feeding regimens than in low dietary CP feeding regimen (p <0.05). It is concluded that 16%-14%-12% dietary CP sequence is desirable in respect of economics and environment for practical three phase feeding regimen for gilts and barrows during finishing period.

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Documento generato il 19/09/20 alle ore 18:41:33