Effect of Sex and Dietary Organic Zinc on Growth Performance, Carcass Traits, Tissue Mineral Content, and Blood Parameters of Broiler Chickens
| Autor: | Cheorun Jo, H.M. Salim, Bong Duk Lee, Soo Kee Lee, Hak R. Lee |
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| Rok vydání: | 2011 |
| Předmět: |
Blood Glucose
Male medicine.medical_specialty Meat Animal feed Endocrinology Diabetes and Metabolism Clinical Biochemistry chemistry.chemical_element Zinc Biology Biochemistry Inorganic Chemistry Eating chemistry.chemical_compound Sex Factors Animal science Internal medicine Organometallic Compounds medicine Animals Skin Analysis of Variance Minerals Dose-Response Relationship Drug Cholesterol Body Weight Biochemistry (medical) Broiler food and beverages General Medicine Animal development Animal Feed Diet Dose–response relationship Endocrinology chemistry Dietary Supplements Calcium Female Collagen Analysis of variance Blood parameters Chickens |
| Zdroj: | Biological Trace Element Research. 147:120-129 |
| ISSN: | 1559-0720 0163-4984 |
| Popis: | Zinc (Zn) is an essential mineral for animal development and function. A study was carried out to evaluate the effect of sex and dietary organic zinc (OZ) on growth performance, carcass traits, tissue mineral content, and blood parameters of broiler chickens. A total of 240 1-day-old male and 240 female broiler chicks (Cobb × Cobb) were assigned to two dietary levels of OZ (2 × 2 factorial) with six replicates per treatment (20 birds/replicate pen). The OZ supplementation levels were 0 and 25 ppm. Results showed that OZ supplementation did not affect the growth performance of male and female broilers, but the males showed significantly better (P < 0.05) growth performance than females did. Similarly, OZ supplementation did not affect the thickness of both the back and thigh skin of male and female broilers; however, males had thicker skin than females. Dietary OZ supplementation did not affect collagen contents in the skin and meat samples. Male broilers had higher skin collagen contents than females, but no sex difference was found in meat collagen contents. OZ supplementation did not affect the shear force values of skin and meat samples. Male broilers had higher shear force values of back skin than females, but not in the meat samples. Dietary OZ supplementation increased (P < 0.05) the thigh meat Zn content in both sexes. The plasma Ca content was significantly (P < 0.05) increased by dietary OZ supplementation; however, other blood parameters were not affected by dietary OZ supplementation. Males had higher plasma glucose and cholesterol content than females. It is concluded that dietary OZ supplementation at the level of 25 ppm does not affect the growth performance and skin quality of broiler chickens but increases the Zn content in thigh meat and Ca content in plasma of broiler chickens. Male broilers had better growth performance and skin quality than females. |
| Databáze: | OpenAIRE |
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