文献类型：期刊文献

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

作者：Zhang, Wei[2];Zhang, Yong S.[2];Zhu, Xiao P.[2];Wang, Run L.[1];Jia, Zhi H.[2,3]

机构：[1]Guangdong Ocean Univ, Dept Anim Sci, Zhanjiang 524088, Peoples R China;[2]China Agr Univ, State Key Lab Anim Nutr, Coll Anim Sci & Technol, Beijing 100094, Peoples R China;[3]China Agr Univ, Coll Anim Sci & Technol, Beijing 100193, Peoples R China

年份：2011

卷号：143

期号：3

起止页码：1470

外文期刊名：BIOLOGICAL TRACE ELEMENT RESEARCH

收录：SCI-EXPANDED(收录号：WOS:000297348900026)、、Scopus(收录号：2-s2.0-82455192377)、WOS

基金：The research was supported by the Key Program of the National Natural Science Foundation of China (project No. 30901032; Beijing, P.R. China), the Research Program of the Key Laboratory of Animal Nutrition (project No. 2004DA125184G0803; Beijing, P.R. China).

语种：英文

外文关键词：Copper; Molybdenum; Growth performance; Follicle; Cashmere; Goats

外文摘要：A 2 x 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.