The lysine requirement for reproduction in swine

Woerman, Robert Lee

doi:10.31274/rtd-180817-3384

Cited by 12 publications

(44 citation statements)

References 12 publications

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“…Increasing dietary Lys had no effect on litter size or litter birthweight in the present study. These findings agree with the results reported by Woerman and Speer () who evaluated the effects of Lys levels on litter size or litter birthweight. Cooper et al.…”

Section: Discussionsupporting

confidence: 93%

“…In the present study, gilt body weight gain in late gestation was maximized at the 0.70% SID Lys level. Woerman and Speer () estimated requirement using nitrogen balance and reported that the total Lys requirement was 0.43% (7.8 g/day) with a constant feed intake throughout pregnancy. However, the amount of protein accretion in the maternal body increased rapidly in the middle and late gestation compared with early gestation (King et al., ; Pettigrew and Yang, ).…”

Section: Discussionmentioning

confidence: 99%

“…Several studies have been conducted to estimate the optimum total dietary Lys levels in diets on the performance of primiparous gestating sows (Rippel et al., ; Duée and Rérat, ; Woerman and Speer, ), but the optimum standardized ileal digestible (SID) Lys level has not been determined. SID values have been suggested as the best choice to be used for routine feed formulation (Stein et al., ), because they are additive in mixed diets and there is no need to measure the specific endogenous amino acid loss (Stein et al., ).…”

Section: Introductionmentioning

confidence: 99%

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Estimation of the standardized ileal digestible lysine requirement for primiparous pregnant sows

Shi

et al. 2015

Animal Physiology Nutrition

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This experiment was conducted to determine the optimal standardized ileal digestible lysine (SID Lys) level in diets fed to primiparous sows during gestation. A total of 150 (Landrace × Large White) crossbred gilts (weighing 149.9 ± 3.1 kg) were fed gestation diets (12.55 MJ of ME/kg) containing SID Lys levels of 0.43, 0.52, 0.60, 0.70 or 0.80% respectively. Gilts were fed 2.0 kg/day from day 1 to 80 and 3.0 kg/day from day 80 to 110 of gestation respectively. Gilts were allocated to treatments based on their body weight on the day of breeding. Weight gain from day 80 to 110 increased with increasing dietary SID Lys levels (p = 0.044). Fitted broken-line (p = 0.031) and quadratic plot (p = 0.047) analysis of body weight gain indicated that the optimal SID Lys level for primiparous sows was 0.70 and 0.69% respectively. During gestation, neither backfat thickness nor loin eye area was affected by dietary SID Lys level. Increasing dietary Lys had no effect on the litter size at birth or pigs born alive per litter. Litter weight at birth was not affected by dietary SID Lys level. The litter weight variation at birth quadratically decreased with increasing dietary SID Lys (p = 0.021) and was minimized at 0.70% dietary SID Lys. Gilts fed the 0.70% SID Lys diet had the highest dry matter (p = 0.031) and protein (p = 0.044) content in colostrum. On day 110 of gestation, gilts fed the 0.70% SID Lys diet tended to have the highest serum prolactin (p = 0.085) and serum insulin (p = 0.074) levels. The data demonstrate that the optimal dietary SID Lys was 0.70% for pregnant gilts, which is similar to the recommendation of 0.69% that was estimated by the NRC (2012).

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Section: Discussionsupporting

confidence: 93%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Estimation of the standardized ileal digestible lysine requirement for primiparous pregnant sows

Shi

et al. 2015

Animal Physiology Nutrition

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“…The plasma free level of the amino acid in question remains at a low, but constant concentration until the dietary requirement is met, then increases rapidly, with higher dietary levels resulting in a rapid accumulation of the amino acid in the plasma (Zimmerman and Scott, 1965;Mitchell et al, 1968;Bravo et al, 1970;Stockland et al, 1970;Stockland et al, 1971). Similar data have been reported by Oestemer et al (1973), Tontisirin et al (1973), Tontisirin et al (1974), Henry et al (1976) and Woerman and Speer (1976).…”

Section: Plasma Amino Acids As Indicators Of Amino Acid Requirementsmentioning

confidence: 59%

“…Bravo et al (1970), Oestemer et al (1973) and Henry et al (1976) reported similar responses with growing pigs in determining the Isoleucine requirement. Ramamurthy and Stothers (1974) observed increasing plasma isoleucine in lactating sows In past amino acid studies, an inverse relationship between plasma urea concentration and that of the amino acid in question has been shown (Lewis and Speer, 1973;Brown and Cline, 197^5 Lewis and Speer, 1974a;Sohail et âl., 1974;Lewis and Speer, 1975a;Woerman and Speer, 1976).…”

Section: Plasma Amino Acids and Urea Responsesmentioning

confidence: 99%

Isoleucine and leucine requirements of the lactating sow

Haught

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Efficiency of standardized ileal digestible lysine utilization for whole body protein deposition in pregnant gilts and sows during early-, mid-, and late-gestation

Ramirez-Camba

Dunn²,

Htoo

et al. 2020

Journal of Animal Science

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The efficiency of SID Lys utilization (kSID Lys) in gilts and sows during early (d 48-52), mid (d 75-79) and late gestation (d 103-107) was investigated using 88 pregnant females (PIC 1050; 27 gilts, 27 parity 1 sows, 34 parity 2+ sows; 192.96 ± 22.84 kg at d 42 ±1 of gestation) and whole body nitrogen (N) retention balance studies. Females were assigned to one of 4 SID Lys levels ranging from 40 to 70% of the daily SID Lys requirements above maintenance for a parity 1 sow according to the NRC (2012) gestating sow model in each gestation period. Experimental diets were isocaloric (3,335 kcal ME/kg) and isoproteic (11.75 % CP) and dietary indispensable AA were set to meet or exceed 100% of AA:Lys ratios. The slope of the linear response to graded SID Lys intake was defined as kSID Lys. With the aim of increasing the accuracy of kSID Lys estimates, gilt data from the current study was combined with gilt data from a previous study conducted at the same facility using 4 SID Lys levels ranging from 60 to 90% of the daily SID Lys requirements above maintenance for gilts according to the NRC (2012) gestating sow model. Whole body Lys retention of the combined gilt data set was assessed with different broken-line and nonlinear models. The kSID Lys was 0.65, 0.38 and 0.52 for early, mid, and late gestation, respectively in gilts. A linear response to graded SID Lys intake was found in late gestation only in parity 1 and 2+ sows; kSID Lys was determined as 0.44 and 0.52 in late gestation for parity 1 and parity 2+ sows , respectively. There were no differences in kSID Lys in late gestation between parities. For the combined gilt data, the model of best performance (reduced error and greater goodness of fit) was the Hoerl model. Maximum kSID Lys (i.e. g SID Lys retention/g SID Lys intake) in gilts was 0.67, 0.54, and 0.53 in early, mid and late gestation predicted at 7.2, 9.1 and 13.5 g of SID Lys intake/d, respectively based on the Hoerl model. Maximum SID Lys retention in gilts was similarly predicted at 8.5, 10.5 and 20.9 g of SID Lys intake/d in early, mid and late gestation and resultant kSID Lys of 0.61, 0.51 and 0.44, respectively. The findings of this study demonstrate that kSID Lys varies by stage of gestation and SID Lys intake level and that, at least in gilts, a dynamic kSID adjusted for daily intake more adequately reflects biological response and hence allows more precise feeding of pregnant females.

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The lysine requirement for reproduction in swine

Cited by 12 publications

References 12 publications

Estimation of the standardized ileal digestible lysine requirement for primiparous pregnant sows

Estimation of the standardized ileal digestible lysine requirement for primiparous pregnant sows

Isoleucine and leucine requirements of the lactating sow

Efficiency of standardized ileal digestible lysine utilization for whole body protein deposition in pregnant gilts and sows during early-, mid-, and late-gestation

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