Wang Jianguo, Han Jincheng, Chen Guanhua, Qu Hongxia, Wang Zhixiang, Yan Yongfeng, Cheng Yeonghsiang
College of Animal Husbandry and Veterinary Science, Henan Agricultural University, China.
Department of Animal Science, College of Life Science, Shangqiu Normal University, China.
J Poult Sci. 2016 Jan 25;53(1):22-28. doi: 10.2141/jpsa.0150009.
The present study aims to compare the relative bioavailability (RBV) of 1-hydroxycholecalciferol (1-OH-D) to cholecalciferol (D) in 1- to 21-d-old broiler chicks fed with calcium (Ca)- and phosphorus (P)-deficient diets. A total of 400 male of 1-d-old Ross 308 broilers were randomly assigned to 8 treatments with 5 replicates each. Five levels of D (0, 2.5, 5, 10, and 20 g/kg) and three levels of 1-OH-D (1.25, 2.5, and 5 g/kg) were added to a basal diet. The basal diet contained 0.50% Ca and 0.25% non-phytate phosphorus (NPP), without D. The RBV of 1-OHD to D was determined by the slope ratio method. Using bodyweight gain, feed intake, feed efficiency, and plasma Ca as criteria, the RBV of 1-OH-D to D were 4.78, 4.75, 4.50, and 4.21, respectively. Using tibia breaking-strength, weight, length, width, ash weight and content, and Ca and P content as criteria, the RBV of 1-OH-D to D were 5.58, 5.16, 4.42, 4.70, 5.03, 4.46, 4.70, and 4.79. Using femur weight, length, width, ash weight and content, and Ca and P content as criteria, the RBV of 1-OH-D to D were 5.09, 4.43, 3.19, 5.83, 5.21, 5.27, and 5.31. Using metatarsus weight, length, width, ash weight and content, and Ca and P content as criteria, the RBV of 1-OHD to D were 5.00, 4.05, 5.94, 4.73, 5.33, 5.64, and 4.28. These data indicate that the RBV of 1-OH-D to D is 4.84 in promoting growth performance and bone mineralization in broilers from 1 to 21 d of age.
本研究旨在比较1-羟基胆钙化醇（1-OH-D）与胆钙化醇（D）对1至21日龄饲喂钙（Ca）和磷（P）缺乏日粮的肉鸡的相对生物利用度（RBV）。总共400只1日龄罗斯308雄性肉鸡被随机分配到8个处理组，每组5个重复。在基础日粮中添加了5个水平的D（0、2.5、5、10和20 g/kg）和3个水平的1-OH-D（1.25、2.5和5 g/kg）。基础日粮含有0.50%的Ca和0.25%的非植酸磷（NPP），不含D。1-OHD相对于D的RBV采用斜率比法测定。以体重增加、采食量、饲料效率和血浆Ca为标准，1-OH-D相对于D的RBV分别为4.78、4.75、4.50和4.21。以胫骨断裂强度、重量、长度、宽度、灰分重量和含量以及Ca和P含量为标准，1-OH-D相对于D的RBV分别为5.58、5.16、4.42、4.70、5.03、4.46、4.70和4.79。以股骨重量、长度、宽度、灰分重量和含量以及Ca和P含量为标准，1-OH-D相对于D的RBV分别为5.09、4.43、3.19、5.83、5.21、5.27和5.31。以跖骨重量、长度、宽度、灰分重量和含量以及Ca和P含量为标准，1-OHD相对于D的RBV分别为5.00、4.05、5.94、4.73、5.33、5.64和4.28。这些数据表明，在促进1至21日龄肉鸡生长性能和骨矿化方面，1-OH-D相对于D的RBV为4.84。
