Kim, Y.H.
(Department of Animal Science and Technology, College of Agriculture and Life Sciences, Seoul National University)
,
Han, In K.
(Department of Animal Science and Technology, College of Agriculture and Life Sciences, Seoul National University)
,
Choi, Y.J.
(Department of Animal Science and Technology, College of Agriculture and Life Sciences, Seoul National University)
,
Shin, I.S.
(American Soybean Association)
,
Chae, B.J.
(Department of Animal Science and Technology, College of Agriculture and Life Sciences, Seoul National University)
,
Kang, T.H.
(Department of Animal Science, KongJu National University)
An experiment was conducted to evaluate the effects of dietary levels of chromium in the form of chromium picolinate on growth performance, nutrient utilizability, carcass composition, serum traits, and in vitro lipolysis and lipogenesis in adipose tissues of Arbor Acre broiler chicks. Experimental ...
An experiment was conducted to evaluate the effects of dietary levels of chromium in the form of chromium picolinate on growth performance, nutrient utilizability, carcass composition, serum traits, and in vitro lipolysis and lipogenesis in adipose tissues of Arbor Acre broiler chicks. Experimental diets containing six different levels of chromium (0, 100, 200, 400, 600 and 800 ppb) were fed for 6 weeks. Individual treatment had six replicates of eight birds each and their average initial weight was 59.2 g. Dietary addition of chromium did not affect growth performance and nutrient utilizability. However, mortality appeared to be reduced with addition of chromium to the diet. It was obvious that chromium supplementation significantly decreased serum cholesterol and increased serum HDL cholesterol (p < 0.05), but serum insulin, glucose, triglyceride and non-esterified fatty acid concentrations were inconsistent among dietary supplementation levels of chromium. The in vitro lipolysis and lipogenesis in adipose tissues were significantly influenced by dietary addition of chromium (p < 0.05). Chicks fed diets containing 200 or 400 ppb chromium showed the highest protein content and the lowest fat content in their carcass.
An experiment was conducted to evaluate the effects of dietary levels of chromium in the form of chromium picolinate on growth performance, nutrient utilizability, carcass composition, serum traits, and in vitro lipolysis and lipogenesis in adipose tissues of Arbor Acre broiler chicks. Experimental diets containing six different levels of chromium (0, 100, 200, 400, 600 and 800 ppb) were fed for 6 weeks. Individual treatment had six replicates of eight birds each and their average initial weight was 59.2 g. Dietary addition of chromium did not affect growth performance and nutrient utilizability. However, mortality appeared to be reduced with addition of chromium to the diet. It was obvious that chromium supplementation significantly decreased serum cholesterol and increased serum HDL cholesterol (p < 0.05), but serum insulin, glucose, triglyceride and non-esterified fatty acid concentrations were inconsistent among dietary supplementation levels of chromium. The in vitro lipolysis and lipogenesis in adipose tissues were significantly influenced by dietary addition of chromium (p < 0.05). Chicks fed diets containing 200 or 400 ppb chromium showed the highest protein content and the lowest fat content in their carcass.
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제안 방법
Three chicks at three and six weeks of age were randomly housed in a metabolic cage individually, and experimental diets and water were fed ad libitum. After four days of adaptation, total excreta were collected four times a day for the three consecutive days by avoiding the contamination of foreign materials such as feed, feathers and scales. Samples were pooled and dried in an airforced drying oven at 60℃ for 72 hours to gain constant dry weight.
Treatments were experimental diets supplemented at 0, 100, 200, 400, 600 and 800 ppb of chromium in the form of chromium picolinate. Arbor Acre broiler chicks were used as experimental subjects.
데이터처리
Statistical analysis for the data was carried out by comparing means according to Duncan's multiple range test (Duncan, 1955), using General Linear Model (GLM)
Procedure of SAS (1985) package program.
이론/모형
Six chicks from each treatment were sacrificed by cervical dislocation and then frozen for determination of final carcass composition. Carcass sanpies were freezedried (ISE, Korea), ground and analyzed by AOAC (1990) methods.
성능/효과
In finishing period (4-6 weeks), the utilizability of dry matter and crude protein were not affected by levels of chromium. The utilizability of crude fat and crude ash showed significant differences among treatments (p < 0.05); at 200 ppb chromium, crude fat utilizability was lower than control and 100 ppb chromium level, whereas
crude ash utilizability was lower in control and 600 ppb chromium than 100 ppb chromium.
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