Lysine requirements of high-producing multiparous sows during lactation

Akane ASHIHARA; Hitoshi Murakami; Hideyuki Ohmori; Hiroaki Inoue; Aiko Ishida

doi:10.2508/chikusan.96.325

November 25, 2025Nihon Chikusan GakkaihoOpen Access

Lysine requirements of high-producing multiparous sows during lactation

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Key Points

To determine the standardized ileal digestible (SID) lysine requirements of high-producing multiparous sows throughout a 28-day lactation period.
Assigned 32 Landrace × Large White multiparous sows (parities 2–6, pre-farrowing body weight 264 ± 16 kg) to diets containing 0.69%, 0.83%, 0.94%, or 1.07% SID lysine from day 2 postpartum to weaning at day 28.
Evaluated sow performance, litter weight gain, milk composition, plasma free lysine, and plasma urea nitrogen using a broken-line regression model against daily SID lysine intake and diet concentration.
Litter weight gain during weeks 2 and 3 was greater in the 0.83% SID lysine group than in the 0.69% group, whereas overall sow performance, piglet mortality, and milk composition showed no differences across treatments.
Broken-line model analysis of plasma free lysine and plasma urea nitrogen estimated that sows nursing 12.66 piglets at week 4 require 62.1 g/day of SID lysine, corresponding to a dietary SID lysine content of 0.80% to 0.85%.

Implication

Feeding trial reveals optimal dietary lysine requirements in high-producing lactating sows, suggesting a daily intake of 62.1 grams supports peak piglet growth and lactation performance.

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Cite This Study

ASHIHARA et al. (2025) studied this question.

synapsesocial.com/papers/6a8367db7185a3e2a8dfab1f https://doi.org/10.2508/chikusan.96.325

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Lysine requirements of high-producing multiparous sows during lactation

Key Points

Implication

Abstract

Discussion

Cite This Study

Lysine requirements of high-producing multiparous sows during lactation

Key Points

Implication

Abstract

Discussion

Cite This Study

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