Evaluation of standardized ileal digestibility of amino acids in corn, barley, wheat bran fed to primiparous sows during gestation, lactation, and post-weaning period.
[en] This study determined the apparent ileal digestibility (AID) and standardized ileal digestibility (SID) of crude protein (CP) and amino acids (AA) of corn, barley, and wheat bran in primiparous sows. Four physiological stages of primiparous sows were examined: a gestation stage where sows were restricted-fed, a lactation stage where sows were fed ad libitum, and then two post-weaning stages, an ad libitum-fed phase followed by a restricted-fed phase. A total of 8 primiparous sows fitted with T-cannulas in the distal ileum were assigned to an 8 × 3 Youden square design with 4 diets (corn, barley, wheat bran, and nitrogen [N]-free diet) and three periods, resulting in a total of 6 replicates per treatment. The basal endogenous losses of CP and AA were determined after feeding an N-free diet. For barley, the AID of His, Ile, Lys, and Thr was higher in gestating sows compared to restricted-fed post-weaning sows. For wheat bran, the AID of Ile, Leu, Thr, Val, Ala, Asp, Glu, Gly, Ser, and Tyr was higher in lactating sows compared to gestating sows (P < 0.05). For corn, the AID of CP and most AA did not differ across physiological states. Regarding the SID of barley in gestating sows, only the SID of His was higher than in lactating sows and restricted-fed post-weaning sows (P < 0.01), and the SID of Gly was higher than in lactating sows (P < 0.05). For wheat bran, the SID of Glu, Ser, and Tyr in gestating sows was lower than in lactating sows (P < 0.01). The SID of Val and Tyr in lactating sows was higher than in ad libitum access post-weaning sows (P < 0.05). For corn, the SID of Lys, Ala, and Gly in gestating sows was higher than in lactating sows (P < 0.05). The SID of Ile, Lys, Phe, Thr, and Ala in gestating sows was higher than in ad libitum post-weaning sows (P < 0.05). The findings indicate that similar SID values are found for barley in different physiological stages of primiparous sows under the same diet and feed regime, whether ad libitum or restricted. However, for wheat bran, which has a high fiber content, lactating sows exhibited higher AID values and SID values compared to gestating sows for part of AA. For corn, which has a low fiber content, gestating sows exhibited higher SID values compared to lactating sows and ad libitum post-weaning sows. [en] Accurate evaluation of amino acid digestibility is essential for optimizing precision feeding strategies in sows. This study demonstrated that the digestibility of crude protein and amino acids in corn, barley, and wheat bran varies across different physiological stages in primiparous sows. The findings suggest that standardized ileal digestibility values remain stable for barley, while wheat bran, which has higher fiber content, exhibits higher digestibility in lactating sows. In contrast, corn, which contains low fiber content, shows higher standardized ileal digestibility values in gestating sows. These results provide valuable data for formulating diets tailored to different reproductive stages, potentially improving nutrient utilization and feeding efficiency in primiparous sows.
Disciplines :
Animal production & animal husbandry
Author, co-author :
Wei, Zixi ✱; Université de Liège - ULiège > TERRA Research Centre ; Key Laboratory of Feed Biotechnology of Ministry of Agriculture and Rural Affairs, Institute of Feed Research, Chinese Academy of Agricultural Sciences, Beijing 100081, China
Xu, Lei ✱; Key Laboratory of Feed Biotechnology of Ministry of Agriculture and Rural Affairs, Institute of Feed Research, Chinese Academy of Agricultural Sciences, Beijing 100081, China
Yang, Jiaqi; Key Laboratory of Feed Biotechnology of Ministry of Agriculture and Rural Affairs, Institute of Feed Research, Chinese Academy of Agricultural Sciences, Beijing 100081, China
Schroyen, Martine ; Université de Liège - ULiège > TERRA Research Centre > Animal Sciences (AS)
Jiang, Xianren; Key Laboratory of Feed Biotechnology of Ministry of Agriculture and Rural Affairs, Institute of Feed Research, Chinese Academy of Agricultural Sciences, Beijing 100081, China
Cui, Sheng ; College of Veterinary Medicine, Yangzhou University, Yangzhou, Jiangsu 225009, China
Li, Xilong; Key Laboratory of Feed Biotechnology of Ministry of Agriculture and Rural Affairs, Institute of Feed Research, Chinese Academy of Agricultural Sciences, Beijing 100081, China
Pi, Yu ; Key Laboratory of Feed Biotechnology of Ministry of Agriculture and Rural Affairs, Institute of Feed Research, Chinese Academy of Agricultural Sciences, Beijing 100081, China
✱ These authors have contributed equally to this work.
Language :
English
Title :
Evaluation of standardized ileal digestibility of amino acids in corn, barley, wheat bran fed to primiparous sows during gestation, lactation, and post-weaning period.
CAAS - Chinese Academy of Agricultural Sciences NSCF - National Natural Science Foundation of China CSC - China Scholarship Council
Funding text :
This study was financially supported by the National Key Research and Development Program of China (2021YFD1300202), the Agricultural Science and Technology Innovation Program of the Feed Research Institute of the Chinese Academy of Agricultural Sciences (CAAS-IFR-ZDRW202301), the Central Public-interest Scientific Institution Basal Research Fund (1610382023011), the National Natural Science Foundation of China (32272908), and the China Scholarship Council (Award to Zixi-Wei for 1 year\u2019s study abroad at the University of Li\u00E8ge).
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