文献类型： 外文期刊
作者： Wang, H. 1 ; Wang, X. Y. 1 ; Zhan, Y. C. 1 ; Peng, B. 2 ; Zhang, H. Q. 3 ; Wang, W. C. 1 ; Yang, L. 1 ; Zhu, Y. W. 1 ;
作者机构： 1.South China Agr Univ, Coll Anim Sci, State Key Lab Livestock & Poultry Breeding, Guangzhou 510000, Peoples R China
2.Guangzhou Huashang Vocat Coll, Guangzhou 510000, Peoples R China
3.Tongren Vocat & Tech Coll, Key Open Lab Chinese Vet Med, State Ethn Affairs Commiss, Tongren 554300, Peoples R China
关键词： Vitamin D-3 requirement; Geese; Calcium-phosphorus metabolism; Tibia development
期刊名称：ANIMAL FEED SCIENCE AND TECHNOLOGY （ 影响因子：3.2； 五年影响因子：3.6 ）
ISSN： 0377-8401
年卷期： 2023 年 304 卷
页码：
收录情况： SCI
摘要： The present study was conducted to investigate the effect of dietary vitamin D-3 levels (0, 200, 400, 800, 1600, and 3200 IU/kg) on growth performance, calcium-phosphorus metabolism, and tibia development of goslings from 1 to 21 days of age. A total of 720 one-day-old Magang male goslings with similar initial body weight were randomly divided into 6 treatments with 6 replicates per treatment and 20 geese per replicate. The goslings fed with 400 IU vitamin D-3/kg of diet obtained the maximum average daily gain, while vitamin D-3 supplementation significantly improved the feed/gain of goslings aged from 1 to 21 days (P < 0.05). The vitamin D-3 requirement of gosling aged from 1 to 21 days for optimal feed/gain ratio and average daily gain were estimated from three regression models (one-slope straight, two-slope straight, and quadratic broken-line model) to be 246-352 IU/kg diet and 400-518 IU/kg diet, respectively. Serum calcium and phosphorus contents, parathyroid hormone level, and 25-hydroxycholecalciferol level responded to increasing dietary vitamin D-3 levels (P < 0.05) and reached a plateau at 800, 0, and 200 IU vitamin D-3/kg diet, respectively. The mRNA expressions of target genes related to calcium homeostasis such as vitamin D-3 receptor, Na+/Ca2+ exchanger 1, and plasma membrane calcium ATPase 1b in the duodenum and kidney (P < 0.05) and parathyroid hormone receptor mRNA expression in the kidney (P < 0.05) were increased linearly and quadratically with the increasing dietary vitamin D-3 levels, respectively. Graded doses of dietary vitamin D-3 from 0 to 3200 IU/kg produced linear responses in tibial density (P < 0.05). The vitamin D-3 requirement of gosling aged from 1 to 21 days ranged from 519 to 698 IU/kg diet when tibial density as an evaluation criterion. In conclusion, the vitamin D-3 requirement of gosling aged from 1 to 21 days for optimal growth performance (feed/gain and average daily gain) and tibial density was estimated to be 246-352 IU/kg of diet, 400-518 IU/kg of diet, and 519-698 IU/kg of diet based on three regression models (one-slope straight, two-slope straight, and quadratic broken-line model), respectively. The most appropriate vitamin D-3 requirement was recommended at 602 IU/kg of diet of young geese based on the mean estimated values of three regression models for the tibial density with the highest coefficient of determination and lowest mean square error.
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