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Titolo:
Effect of nutrient intake in lactation on sow performance: Determining thethreonine requirement of the high-producing lactating sow
Autore:
Cooper, DR; Patience, JF; Zijlstra, RT; Rademacher, M;
Indirizzi:
Prairie Swine Ctr Inc, Saskatoon, SK S7H 5N9, Canada Prairie Swine Ctr Inc Saskatoon SK Canada S7H 5N9 oon, SK S7H 5N9, Canada Univ Saskatchewan, Dept Anim & Poultry Sci, Saskatoon, SK S7N 5B5, Canada Univ Saskatchewan Saskatoon SK Canada S7N 5B5 skatoon, SK S7N 5B5, Canada Degussa Huls AG, D-63403 Hanau, Germany Degussa Huls AG Hanau Germany D-63403 sa Huls AG, D-63403 Hanau, Germany
Titolo Testata:
JOURNAL OF ANIMAL SCIENCE
fascicolo: 9, volume: 79, anno: 2001,
pagine: 2378 - 2387
SICI:
0021-8812(200109)79:9<2378:EONIIL>2.0.ZU;2-S
Fonte:
ISI
Lingua:
ENG
Soggetto:
LYSINE REQUIREMENT; 1ST-LITTER SOWS; SUCKLING SOWS; PROTEIN; NITROGEN; SUPPLEMENTATION; DEPENDENCE; LEVEL;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Agriculture,Biology & Environmental Sciences
Citazioni:
23
Recensione:
Indirizzi per estratti:
Indirizzo: Patience, JF Prairie Swine Ctr Inc, POB 21057,2105 8th St E, Saskatoon, SKS7H 5N9, Canada Prairie Swine Ctr Inc POB 21057,2105 8th St E Saskatoon SKCanada S7H 5N9
Citazione:
D.R. Cooper et al., "Effect of nutrient intake in lactation on sow performance: Determining thethreonine requirement of the high-producing lactating sow", J ANIM SCI, 79(9), 2001, pp. 2378-2387

Abstract

Reproductive performance is steadily increasing within the pork industry; logically, amino acid requirements need to be redefined for sows producing larger litters. The objective of this study was to determine the threonine requirement of the high-producing lactating sow and to determine the effectof lysine on this requirement. A total of 419 PIC C-15 sows were assigned randomly to treatment within parity groups (1, 2, and 3+) and gestation treatment at d 110 of gestation. Lactation diets were formulated to contain 0.80% total lysine (tLYS) with 0.30, 0.35, 0.40, 0.45, 0.50, 0.55, 0.60, or 0.65% total threonine (tTHR) or 1.06% tLYS with 0.40, 0.45, 0.50, 0.55, 0.60, 0.65, or 0.70% tTHR. Litters were standardized to a minimum of 11 pigletswithin 48 h after farrowing, and sows had free access to feed throughout lactation (lactation length = 20.1 0.1 d). Sow ADFI exceeded expectation, averaging 6.90, 7.40, and 7.20 kg/d for Parities 1, 2, and 3+, respectively. Daily tLYS intake was 58 g/d (47 g of apparent ileal digestible lysine [dLYS] per day) and 74 g/d (59 g dLYS/d) for the low- and high-lysine group, respectively. Lysine intake did not affect sow or litter performance (P > 0.10). Sows gained an average of 4.8 kg in lactation. Using regression analysis, BW gain was maximized at 0.54% tTHR for all parity groups (quadratic; P < 0.05). Litter weaning weight (67.1, 67.9, and 66.2 kg for Parities 1, 2, and 3+, respectively) and litter weight gain (2.49, 2.53, and 2.44 kg/d forParities 1, 2, and 3+, respectively) were maximized at 0.53% tTHR using regression analysis, for all parity groups (quadratic; P < 0.05). Based on regression analysis, plasma urea nitrogen on d 10 and 18 was minimized at 0.54% tTHR (P < 0.05). Lysine levels in excess of 58 g of tLYS/d did not benefit sow or litter performance. The requirement for threonine to minimize sowtissue mobilization was 37, 40, and 38 g tTHR/d (28, 30, and 30 g of apparent ileal digestible threonine [dTHR] per day) for Parities 1, 2, and 3+ sows, respectively. The threonine required to maximize litter performance was36, 39, and 38 g of tTHR/d (28, 30, and 29 g of dTHR/d) for Parities 1, 2,and 3+ sows, respectively. Alternatively, the requirement can be expressedas 14.3 g tTHR (11.8 g dTHR) per kilogram of litter gain.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 29/09/20 alle ore 10:03:05