The quantification of the effect of increasing levels of various fats on body weight gain, efficiency of food conversion and food intake of growing chicks

Vermeersch, G.; Vanschoubroek, F.

doi:10.1080/00071666808415690

Cited by 31 publications

(10 citation statements)

References 40 publications

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“…Turkeys fed diets with 3,100 kcal ME n /kg grew faster and consumed less feed than those fed the CSBM diets. These results were expected on the basis of data reported by Vermeersch and Vanschoubroek (1968) with chickens and by Sell et al (1986) and Hurwitz et al (1988) with turkeys.…”

Section: Discussionsupporting

confidence: 80%

Effects of Early Immune Stress and Changes in Dietary Metabolizable Energy on the Development of Newly Hatched Turkeys.

et al. 1995

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Two experiments were conducted to document the effects of an early immunologic stress and changes in dietary ME(n) on growth and nutrient utilization of newly hatched turkeys. Treatments in both experiments consisted of a complete factorial arrangement of two types of injection and four isonitrogenous diets. Turkeys were injected i.p. with saline (SAL) or a solution of lipopolysaccharide (LPS) (100 micrograms LPS/mL SAL) at 1, 3, and 5 d of age. In Experiment 1, two diets were formulated to contain 2,800 kcal ME(n)/kg. One was a corn-soybean meal-based diet (CSBM) and the other contained 8% Solkafloc (SKF). A third diet (3,100 kcal ME(n)/kg) was formulated by substituting 8% sucrose (SUC) for the 8% SKF. The fourth diet included in Experiment 1 was formulated to contain 3,700 kcal ME(n)/kg. The CSBM and SUC diets were also included in Experiment 2. Two additional diets tested in Experiment 2 were the CSBM diet containing 74.5 mg ibuprofen/kg (IBU) and a corn-soybean meal-based diet with a ME(n) value of 3,100 kcal/kg (CS31). Injection with LPS reduced (P < .05) BW of turkeys throughout Experiment 1 and until 9 d of age in Experiment 2, as compared with injection with SAL, irrespective of dietary treatment. The reduction in BW was mainly due to a decrease in feed intake (FI) (P < .05). Turkeys fed diets with 3,100 kcal ME(n)/kg were heavier (P < .05) than those fed diets with 2,800 kcal ME(n)/kg, irrespective of injection. Inclusion of ibuprofen to the CSBM diet from 1 to 14 d improved (P < .05) BW and feed efficiency (P < .01) of turkeys at 14 d of age, compared with turkeys fed the CSBM diet. Determined ME(n) was not affected by LPS injection. Adverse effects of LPS injection on growth of turkey poults were mainly the consequence of a reduced FI and not of altered nutrient utilization. These effects were not fully alleviated by feeding a diet with 3,100 kcal ME(n)/kg.

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Section: Discussionsupporting

confidence: 80%

Effects of Early Immune Stress and Changes in Dietary Metabolizable Energy on the Development of Newly Hatched Turkeys.

et al. 1995

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“…Scott et al (1947) demonstrated that both growth rate and efficiency of feed utilization were improved by feeding diets high in digestibility and energy concentration. The effect of increased dietary energy levels upon these parameters was later confirmed by several reports, including those of Sunde (1956), Bossard and Combs (1961), Hill (1964) and Vermeersch and Vanschoubroek (1968). Sunde (1954), Aitken et al (1954), Matterson et al (1955), and Siedler et al (1955) showed improved efficiency of feed utilization with the addition of beef tallow or vegetable oils to the diet of chicks, with a growth response usually associated with the addition of the vegetable oils.…”

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confidence: 63%

Characterization of the Response of Broiler Chickens to Diets Varying in Nutrient Density Content

et al. 1976

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Studies have been conducted to examine the response of broilers to diets varying in nutrient density. Constant energy:nutrient ratios were maintained in diets for growing broilers fed 2970 to 3740 M.E. kcal./kg. and measurements made of weight gain, feed consumption, efficiency of feed utilization, calorie:gain ratios, and various carcass characteristics.Growth rate and efficiency of feed utilization were almost direct functions of the dietary nutrient density level. Broilers offered higher energy diets consumed a greater number of calories but converted these to gain with little impairment in caloric efficiency. Regression analyses were used to derive equations for predicting changes in feed consumption and growth rate associated with changes in dietary nutrient density level.

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“…The second and third hypotheses are that the broilers' growth and food utilisation are functions of the dietary metabolisable energy (Donaldson et al, 1956;Fisher and Wilson, 1974) or added fat concentrations (Vermeersch and Vanschoubroek, 1968;Nakhata and Anderson, 1982). Supporters of these hypotheses cite considerable research data.…”

Section: Introductionmentioning

confidence: 95%

The response of growing broiler chickens to dietary contents of protein, energy And Added Fat

Pesti

Smith

1984

British Poultry Science

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The results of 47 experiments with broilers over the period 1974 to 1983 were selected for regression analysis. Included were those dealing with the relationship of growth and food utilisation to content of dietary protein (DP), metabolisable energy (DME) and added fat (DAF) in conventional feedingstuffs. Significant correlations were found between DP and DME (0.50; P less than 0.01), DP and DAF (0.61; P less than 0.01), and DME and DAF (0.65; P less than 0.01) contents. Using multiple regression models, growth and food utilisation efficiency (FUE) were found to be dependent on the linear and quadratic effects of DME (r2 values = 0.67 and 0.64 respectively). Growth and FUE were also dependent on the linear and quadratic effects of DP (r2 values = 0.70 and 0.49 respectively). By including the effects of DME, DP and DAF in the gain and FUE models it was shown that growth and FUE were dependent on DME, DP and DAF (r2 values = 0.76 and 0.79 respectively). It was concluded that hypotheses concerning the broiler's response to DME and DAF were both correct but incomplete. DME, DP and DAF contents must all be known to predict accurately growth and FUE.

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The quantification of the effect of increasing levels of various fats on body weight gain, efficiency of food conversion and food intake of growing chicks

Cited by 31 publications

References 40 publications

Effects of Early Immune Stress and Changes in Dietary Metabolizable Energy on the Development of Newly Hatched Turkeys.

Effects of Early Immune Stress and Changes in Dietary Metabolizable Energy on the Development of Newly Hatched Turkeys.

Characterization of the Response of Broiler Chickens to Diets Varying in Nutrient Density Content

The response of growing broiler chickens to dietary contents of protein, energy And Added Fat

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