1992
DOI: 10.2527/1992.7082493x
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Digestible tryptophan requirements of starting, growing, and finishing pigs

Abstract: Seven hundred eight crossbred pigs were used in growth and digestion trials to determine the digestible tryptophan (Trp) requirement of starting (6 to 16 kg), growing (22 to 50 kg), and finishing (55 to 97 kg) pigs. Each growth trial evaluated a corn-fish meal-corn gluten meal basal diet, the basal diet with five incremental additions of L-Trp, and a control corn-soybean meal diet. The tryptophan content of the six incremental diets ranged from .13 to .255% for starting pigs, .08 to .18% for growing pigs, and … Show more

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Cited by 30 publications
(27 citation statements)
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“…Also, optimal dietary SID Trp:Lys was not achieved by any of the response criteria measured in the same experiment. This is contrary to the results from the studies of Burgoon et al (1992), Eder et al (2001) and Guzik et al (2002) who reported increased growth performance of 6 to 16 kg, 7.5 to 24 kg and 10 to 16 kg pigs due to an increase in apparent ileal digestible, apparent ileal digestible and SID Trp:Lys in Trp-deficient diets, respectively. However, it should be noted that the Trp values for feed ingredients (barley, wheat and soyabean meal) that were used to formulate diets used in this experiment had been determined using near-infrared spectroscopy at Degussa AG (Hanau-Wolfgang, Germany).…”
Section: Discussioncontrasting
confidence: 99%
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“…Also, optimal dietary SID Trp:Lys was not achieved by any of the response criteria measured in the same experiment. This is contrary to the results from the studies of Burgoon et al (1992), Eder et al (2001) and Guzik et al (2002) who reported increased growth performance of 6 to 16 kg, 7.5 to 24 kg and 10 to 16 kg pigs due to an increase in apparent ileal digestible, apparent ileal digestible and SID Trp:Lys in Trp-deficient diets, respectively. However, it should be noted that the Trp values for feed ingredients (barley, wheat and soyabean meal) that were used to formulate diets used in this experiment had been determined using near-infrared spectroscopy at Degussa AG (Hanau-Wolfgang, Germany).…”
Section: Discussioncontrasting
confidence: 99%
“…The ADFI values observed in Experiments 1 and 2 were similar to values reported by other studies (530 g, Burgoon et al, 1992;559 g, Eder et al, 2001) for 6 to 16 kg pigs. The ADFI (Experiment 1) decreased with an increase in dietary SID Lys content, resulting in a tendency towards an increase in G:F due to an increase in dietary SID Lys content.…”
Section: Discussionsupporting
confidence: 90%
“…Similar result was obtained by Eder et al (2003), who, assessing levels of digestible tryptophan in diets for 25-to 50-kg female pigs, observed an increase in ADG GPD of up to 0.141% digestible tryptophan in the diet, corresponding to a ratio of 16.2% with the digestible lysine. The result of ADG obtained in this study is also consistent with that obtained by Burgoon et al (1992), who observed a linear increase of this variable in pigs from 22 to 50 kg fed diets with varying levels of digestible tryptophan from 0.08 to 0.18%.…”
Section: Resultssupporting
confidence: 92%
“…Similar result was obtained by Henry et al (1995), who, evaluating the interaction between protein and tryptophan levels for pigs from 38 to 53 kg, found that daily feed intake increased with the concentration of digestible tryptophan in the diet. Linear effect of tryptophan levels on feed intake of female pigs from 22 to 50 kg was also reported by Burgoon et al (1992) and Guzik et al (2005), in a study with growing pigs.…”
Section: Resultssupporting
confidence: 69%
“…Despite the similar response pattern as a result of the increased levels of digestible tryptophan on daily weight gain observed in the studies, the level of digestible tryptophan (0.175%) which provided best result of daily weight gain in animals in this study was 28% higher than the one obtained by Han et al (1993). Positive effect by the addition of tryptophan into diets on weight gain of piglets in the initial growth phase was also observed by many authors (Burgoon et al, 1992;Sawadogo et al, 1997;Ferguson & Gous, 2002;Pastuzewska et al, 2007;Fernandez & Strathe, 2009;Jansman et al, 2010).…”
Section: Resultsmentioning
confidence: 40%