Impact of Rearing Strategies on the Metabolizable Energy and SID Lysine Partitioning in Pigs Growing from 90 to 200 kg in Body Weight

Animals

Gianluca Galassi¹  Luca Rapetti¹  Isaac Hyeladi Malgwi²  Luigi Gallo²  Stefano Schiavon²  Diana Giannuzzi²  Paolo Carnier³  Veronika Halas⁴ 

[1] Department of Agricultural and Environmental Sciences—Production, Landscape, Agroenergy (DiSAA), University of Milan, Via G. Celoria 2, I-20133 Milan, Italy;Department of Agronomy, Food, Natural Resources, Animals and Environment (DAFNAE), University of Padova, Viale dell’ Università 16, I-35020 Legnaro, Italy;Department of Comparative Biomedicine and Food Science (BCA), University of Padova, Agripolis, Viale dell’Università 16, I-35020 Legnaro, Italy;Department of Farm Animal Nutrition, Kaposvár Campus, Hungarian University of Agriculture and Life Sciences, MATE, Guba Sándor Utca 40, H-7400 Kaposvár, Hungary;

关键词: feed restriction;    heavy pigs;    nutrient partitioning;    protein deposition;    SID lysine;   

DOI  :  10.3390/ani12060689

来源: DOAJ

【 摘 要 】

The current nutrient recommendations focus on pigs fed ad libitum up to 140 kg in body weight (BW). It remains unclear whether this applies to pigs weighing above 140 kg in BW under different rearing conditions. This study aimed to estimate protein (Pd) and lipid (Ld) depositions and the metabolizable energy (ME), standardized ileal digestible lysine (SID lysine) requirement and partitioning in 224 C21 Goland pigs (90–200 kg in BW). The control pigs (C) received diets limiting ME up to 170 kg in slaughter weight (SW) at 9 months of age (SA); older (OA) pigs had restricted diets limiting ME and SID lysine up to 170 kg in SW at >9 months SA; younger (YA) pigs were fed nonlimited amounts of ME and SID lysine up to 170 kg in SW at <9 months SA; and greater weight (GW) pigs were fed as the YA group, with 9 months SA at >170 kg in SW. The estimated MEm averaged 1.03 MJ/kg^0.60. An 11% increase in MEm was observed in OA pigs compared to the controls. Energy restriction had negligible effects on the estimated MEm. The marginal efficiency of SID lysine utilization for Pd averaged 0.725, corresponding to a SID lysine requirement of 9.8 g/100 g Pd.

【 授权许可】

Unknown