Tryptophan supplementation in low-protein diets of sows during late gestation and lactation: Effects on sow performance and piglet growth.

Yuan Gao, Mengliao Wan, Zhiwei Kong, Qiuping Guo, Fengna Li, Yehui Duan

Abstract read

In one paragraph

Article in Animal nutrition (Zhongguo xu mu shou yi xue hui), 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.

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4 · The record

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5 · Who and what money

Authors and funding

6 authors.

Yuan GaoHunan Provincial Key Laboratory of Animal Nutritional Physiology and Metabolic Process, National Engineering Laboratory for Pollution Control and Waste Utilization in Livestock and Poultry Production, Institute of Subtropical Agriculture, Chinese Academy of Sciences, Changsha 410125, Hunan, China.

Mengliao WanHunan Provincial Key Laboratory of Animal Nutritional Physiology and Metabolic Process, National Engineering Laboratory for Pollution Control and Waste Utilization in Livestock and Poultry Production, Institute of Subtropical Agriculture, Chinese Academy of Sciences, Changsha 410125, Hunan, China.

Zhiwei KongGuangxi Key Laboratory of Livestock and Poultry Breeding and Disease Control, Department of Animal Sciences, Guangxi University, Nanning 530004, Guangxi, China.

Qiuping GuoHunan Provincial Key Laboratory of Animal Nutritional Physiology and Metabolic Process, National Engineering Laboratory for Pollution Control and Waste Utilization in Livestock and Poultry Production, Institute of Subtropical Agriculture, Chinese Academy of Sciences, Changsha 410125, Hunan, China.

Fengna LiHunan Provincial Key Laboratory of Animal Nutritional Physiology and Metabolic Process, National Engineering Laboratory for Pollution Control and Waste Utilization in Livestock and Poultry Production, Institute of Subtropical Agriculture, Chinese Academy of Sciences, Changsha 410125, Hunan, China.

Yehui DuanHunan Provincial Key Laboratory of Animal Nutritional Physiology and Metabolic Process, National Engineering Laboratory for Pollution Control and Waste Utilization in Livestock and Poultry Production, Institute of Subtropical Agriculture, Chinese Academy of Sciences, Changsha 410125, Hunan, China.

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

This study aimd to investigate the effects of tryptophan (Trp) supplementation in low-protein diets on sow performance and piglet growth, and its potential mechanisms. Sixty-six multiparous sows (Large White × Landrace) with similar parity (2.87 ± 0.34 parities), body weight (250.75 ± 11.24 kg), and backfat thickness (16.06 ± 1.94 mm) were randomly assigned to six groups. There were eleven sows in each group and one replicate per sow. They were fed the following diets: normal protein diets (18% crude protein [CP], control group [CON]) or low-protein diets (15% CP) containing different levels of Trp (0.15%, 0.21%, 0.27%, 0.33%, and 0.39%, respectively). The results showed that low-protein diets containing 0.21% Trp achieved performance comparable to the CON group. Specifically, no significant differences were observed between the 0.21% Trp group and the CON group in sow average daily feed intake, milk yield from 3 to 21 d, and piglet growth parameters (litter weight and individual weight at 3, 14, and 21 d, as well as average daily gain (ADG) from 3 to 21 d (

Indexed as

Lactating sowLow-protein dietMechanismsPiglet growthTryptophan

Identifiers

PMID42317453

DOI10.1016/j.aninu.2026.01.006

PMCPMC13272582

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Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.