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

Lima, Michele Bernardino de

doi:10.11606/d.11.2012.tde-16082012-103634

Cited by 3 publications

(6 citation statements)

References 27 publications

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“…As modern broilers have high FI, their choline intake has also increased; therefore, their choline requirement per unit of WG may have decreased. In a recent study feeding diets based on corn and soy protein concentrate for Cobb 500™ broilers, choline requirement at standard methionine levels (5.9 g/kg) was determined as 1013 mg/kg for the period of 1-21 d of age (7) , which value is intermediate between the studies mentioned in this article and the present study. According to Briz and Pérez (44) , diets based on corn and soybean contain approximately 1350 mg choline/kg and do not require supplementation (25) , even at low dietary methionine levels (17) .…”

Section: Resultscontrasting

confidence: 55%

“…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.…”

Section: Resultsmentioning

confidence: 99%

“…In Experiment II, five treatments, consisting of choline levels of 0, 200, 400, 600, or 800 mg/kg diet, were applied, with eight replicates each, except for the level of 0 mg/kg, which had 10 replicates. The choline levels used in Experiment II were selected considering the calculated choline values of the basal diets, to include both the linear and the plateau section of the performance response curves, based on the study of Lima (7) , who found choline requirement between 872 and 1013 mg/kg for broilers from 1 to 21 days. Choline requirements were determined by calculating the maximum point of weight gain (WG) equations and considering the cumulative periods in order to prevent the interference of the previous treatment.…”

Section: Methodsmentioning

confidence: 99%

“…In addition, choline prevents perosis or chondrodystrophy in poultry (4) , and it can be oxidized to betaine to donate methyl groups (5) , sharing this function with methionine, which, according to Zeisel (6) , consumes the most choline in the body. Studies have shown that the nutritional requirements of choline and methionine are interdependent, i.e., increasing the supply of one of these nutrients reduces the requirement of the other (7) . Similarly, higher dietary betaine levels reduce choline requirements (8) .…”

Section: Introductionmentioning

confidence: 99%

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Performance of Broilers Fed Different Dietary Choline Sources and Levels

et al. 2017

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Two experiments were carried out to evaluate the bioequivalence of a commercial phosphatidylcholine source (Biocholine™) as an alternative to choline chloride and the choline requirements of broilers of a fast-growth strain. In Experiment I, 672 broilers were fed four Biocholine™ levels (0, 100, 200, or 300 mg/kg) and three choline levels (200, 400, or 600 mg/kg) supplied as choline chloride between 4 and 28 days (d) of age. In Experiment II, 462 broilers received diets supplemented with 0, 200, 400, 600 or 800 mg/kg choline as choline chloride. In both experiments, diets were based on white rice, soybean meal, and corn gluten. In Experiment I, birds fed choline chloride presented higher feed intake than those fed Biocholine™. Both choline supplements linearly improved feed conversion ratio (FCR) between 15 and 28 d, but the curves presented different slopes, showing that one unit (U) of Biocholine™ was equivalent to 2.52 U of choline supplied as choline chloride. In Experiment II, the supplementation of choline had a quadratic effect on weight gain (WG) but did not affect FCR. Choline requirements for WG were determined as 778, 632, and 645 mg/kg for 1-7, 1-35, and 1-42 d of age, respectively.

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Section: Resultscontrasting

confidence: 55%

Section: Resultsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Performance of Broilers Fed Different Dietary Choline Sources and Levels

et al. 2017

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“…The commercial formulation of diets for broilers consists of combining ingredients in appropriate proportions to achieve the appropriate and desired nutritional profile, aiming at the optimum level between performance and cost and, consequently, maximum profitability [10].…”

Section: Introductionmentioning

confidence: 99%

Nonlinear Feed Formulation For Broiler

Almeida

Neto

Bueno

et al. 2020

Int J Innov Educ Res

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The current scenario requires the application of new computational tools for the feed formulation strategy that uses mathematical modeling in decision making. Noteworthy is the nonlinear programming, which aims not only to formulate a diet that meets the needs of the animal, but also the minimum cost and the maximum profit margin. Thus, the work aimed to validate the use of the nonlinear model (NLM), with maximization of the economic return, through estimates of animal performance and feed costs, according to the price variation of the kg of the broiler (price historical average of 2009 and 2010), the phases of creation and sex. For this purpose, 480 broiler broiler chickens, 240 males and 240 females of the same strain (Cobb 500) were used, from 1 to 56 days of age. The experimental design was entirely randomized, totaling 6 treatments (increasing or decreasing the average historical price of live chicken by 25% or 50%), with 4 replicates and 10 broiler chickens per experimental plot. Performance (weight gain and feed consumption), total energy consumption and profit margin were evaluated. Regarding the formulation principle (Linear and Nonlinear), the performance was very similar in relation to the studied parameters. However, when simulated values of 50% below the historical average, performance was significantly impaired in this specific condition. However, due to the profit margin, it demonstrated that the principle of nonlinear formulation allows to significantly reduce losses (P <0.05), mainly in unfavorable conditions of the price of chicken in the market. It is concluded that the nonlinear principle is more appropriate, since the requirements of all nutrients are automatically adjusted by the mathematical model and with the premise of increasing profitability, different from the linear one, which is to achieve maximum performance and not is directly related to the economic factor.

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Effects of herbal choline as a replacement for choline chloride on myopathy, locomotor system, and hepatic health of broilers

Dias,

Santin,

Brasileiro

et al. 2023

Revista Brasileira De Zootecnia

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Non-ruminantsFull-length research article Effects of herbal choline as a replacement for choline chloride on myopathy, locomotor system, and hepatic health of broilers ABSTRACT -The objective of this study was to evaluate the effects of replacing choline chloride with a plant source of choline on the locomotor system, liver health, and development of breast myopathies in broilers aged 1-42 days of age. We allocated 1,120 one-day-old Cobb broilers to four treatment groups and fed them commercial diets based on corn and soybean meal. The treatments included choline in the form of 1,800.00 mg/kg choline chloride; 1,350.00 mg/kg choline chloride + 450.00 mg/kg herbal choline; 900.00 mg/kg choline chloride + 900.00 mg/kg herbal choline; and 1,000.00 mg/kg herbal choline. Each treatment group had eight replications. Throughout the experiment, gait score, footpad dermatitis, hock burn, and leg deformities (valgus and varus) were evaluated in the birds at 28 and 35 days of age. After slaughter, parameters such as breast myopathies, tibial dyschondroplasia score, and histological slides of the pectoral muscle, liver, and proximal tibial epiphysis were assessed. The results demonstrated good hepatic and locomotor health in the broilers, as no classical signs of choline deficiency were observed. Statistical analyses indicated no significant differences between treatments in terms of liver and locomotor health, suggesting that broilers fed diets supplemented with the plant source did not experience choline deficiency. Additionally, no statistically significant differences were found between treatments regarding breast myopathies. Overall, the tested choline plant source can effectively replace choline chloride in broiler diets.

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

Cited by 3 publications

References 27 publications

Performance of Broilers Fed Different Dietary Choline Sources and Levels

Performance of Broilers Fed Different Dietary Choline Sources and Levels

Nonlinear Feed Formulation For Broiler

Effects of herbal choline as a replacement for choline chloride on myopathy, locomotor system, and hepatic health of broilers

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