NDLI: Effect of Different Levels of Copper and Molybdenum Supplements on Performance, Nutrient Digestibility, and Follicle Characteristics in Cashmere Goats

Content Provider	Springer Nature Link
Author	Zhang, Wei Zhang, Yong S. Zhu, Xiao P. Wang, Run L. Jia, Zhi H.
Copyright Year	2011
Abstract	A 2 × 3 factorial arrangement of treatments was used to investigate the effects of different levels of copper (Cu, 0, 19, and 38 mg/kg, dry matter (DM)) and molybdenum (Mo, 0 and 5 mg/kg, DM) supplements and an interaction of these two factors on growth performance, nutrient digestibility, and cashmere and follicle characteristics in cashmere goats. Thirty-six Liaoning cashmere goats (approximately 1.5 years of age; 27.53 ± 1.38 kg of body weight) were assigned randomly to one of six treatments and fed with Chinese wildrye- and alfalfa hay-based treatment diets (the basal diet contained 4.72 mg Cu/kg, 1.65 mg Mo/kg, and 0.21% S.). Body weight was measured on two consecutive days at the start and the end of the 70-day experimental period. On day 30, the metabolism trial was conducted to study the effects of dietary Cu and Mo on nutrient digestibility. The cashmere and skin samples were collected on day 70. Copper supplementation increased (P < 0.05) growth performance and fiber digestion, but there were no differences (P > 0.05) between Cu-supplemented groups. Addition of 19 mg Cu/kg DM increased (P < 0.05) cashmere growth length or growth rate by increasing the number of active secondary follicles. Molybdenum supplementation decreased (P < 0.05) growth, but did not affect (P > 0.05) nutrient digestion, cashmere, and follicle characteristics. There is a tendency or significant interaction effect of Cu and Mo on growth performance (P = 0.057), cashmere growth (P = 0.076), or diameter (P < 0.05) which might be accomplished by changing the number of secondary follicle and active secondary follicle, and secondary to primary follicle ratio. In conclusion, the optimal supplemental Cu level for Liaoning cashmere goats fed with the basal diet was 19 mg/kg DM (the total dietary Cu level of 23.72 mg/kg DM), while 38 mg Cu/kg DM supplementation was found to be needed when 5 mg Mo/kg was added in the basal diet during the cashmere growing period.
Starting Page	1470
Ending Page	1479
Page Count	10
File Format	PDF
ISSN	01634984
Journal	Biological Trace Element Research
Volume Number	143
Issue Number	3
e-ISSN	15590720
Language	English
Publisher	Humana Press Inc
Publisher Date	2011-01-15
Publisher Place	New York
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Copper Molybdenum Growth performance Follicle Cashmere Goats Nutrition Biochemistry Oncology Biotechnology
Content Type	Text
Resource Type	Article
Subject	Biochemistry (medical) Endocrinology, Diabetes and Metabolism Clinical Biochemistry Biochemistry Inorganic Chemistry

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