The choline and sulphur amino acid requirements of broiler chickens fed on semi‐purified diets

Performance of Broilers Fed Different Dietary Choline Sources and Levels

“…While some researchers did not find any influence of choline supplementation on FCR (24,25) , other studies demonstrated that choline had a positive effect on this parameter (15,26,27) . This may be explained by differences in sulfur amino acid levels because choline did not affect FCR only in studies where diets contained high levels of these amino acids, as in the present study.…”

“…Pesti et al (42) supported the theory that performance parameters are not adequate to Performance of broilers fed different dietary choline sources and levels evaluate choline requirements in poultry because when choline-deficient diets are offered, birds utilize other sources, such as methionine, betaine, and cystine, to supply this deficiency. Studies have shown that when dietary choline level is increased, methionine requirement is reduced and vice versa, which is called the methionine-sparing effect (7,26) . Studies using diets with low methionine levels (3.8 and 3.2 g/kg) determined choline requirements of 1200 (14) and 1910 mg/kg (10) in starter broilers.…”

Modelos matemáticos para predição das exigências nutricionais da colina para frangos de corte

“…O NRC (1994) preconiza uma exigência de 1.300 mg/kg de colina para frangos de corte de 1 a 21 dias de idade, este valor de exigência é baseado em vários trabalhos (WEST et al, 1951;QUIILIN, 1961;FRITZ et al, 1967;MOLITORIS;BAKER, 1976a;LIPSTEIN et al, 1977;DERILO;BALNAVE, 1980;BAKER et al, 1983;LOWRY et al, 1987;TSIAGBE et al, 1987).…”

Beneficial Impacts of Choline in Animal and Human With Special Reference to Its Role Against Fatty Liver Syndrome

“…Increased in the number of mortality and many other pathological changes that are involving in various number of tissues that were observed in birds fed on a low choline diet on the other hand, the same later authors reported that the Neither choline nor cystine significantly affected the requirement of methionine or SAA, as estimated by body weight gain (Blachman & Waldroup, 1980). Derilo & Balnave (1980) obtained that when different dietary combinations of choline and TSAA were used with broiler chicks fed purified diet, maximum growth was obtained with a combination of high choline (>1750 mg/kg) and high TSAA (8.49/ kg diet). Anderson & Dobson (1982) showed that increasing the amount of choline supplementation in the avian diet range from 300 to 800 mg/kg feed did not increase the performance or reduce the value of the supplementary methionine.…”

“…Pesti et al (1979; reported large increases at the rate of 12% in body weight gain with supplementation of choline at 0.04 to 0.39% into the practical type diets for chicks and poults from day-old chicks up to 3 weeks of age. Derilo & Balnave (1980) showed that growth of broiler was reduced with the low dietary level of choline. However, these effects were highlighted by very low nutritional total sulphur amino acid (TSAA).…”