The effects of dietary cholecalciferol and 1α-hydroxycholecalciferol levels in a calcium- and phosphorus-deficient diet on growth performance and tibia quality of growing broilers
Journal Title: Journal of Animal and Feed Sciences - Year 2013, Vol 22, Issue 2
Abstract
This study aims to evaluate the effects of cholecalciferol (vitamin D3, 0, 5, 10, 25, 50, 100, 250, 500, and 1000 mg · kg–1) and 1α-hydroxycholecalciferol (1a-OH D3, 0, 2.5, and 5 mg · kg–1) on growth performance and tibia quality and to compare the relative potency of 1α-OH D3 to vitamin D3 in 1- to 21-day-old female broilers fed a calcium (Ca)- and phosphorus (P)-deficient diet. The basal diet contained 0.50% Ca, 0.25% non-phytate phosphorus (NPP) and was not supplemented with vitamin D3, whereas the control diet contained 1.00% Ca, 0.45% NPP, and 25 mg · kg–1 vitamin D3. Dietary vitamin D3 levels significantly affected body weight gain (BWG), feed intake (FI), serum Ca and tibia parameters. The addition of 5 mg · kg–1 1α-OH D3 resulted in greater BWG, FI, and serum Ca as well as tibia ash weight and content, breaking strength, and Ca and P contents, compared with the birds fed the basal diet. Using BWG, serum Ca, tibia ash weight and content, and tibia Ca and P content as the criteria, the vitamin D3 requirements of 1- to 21-day-old broilers fed Ca- and P-deficient diets were 64.0, 16.2, 173.0, 65.1, 33.1 and 30.0 mg · kg–1, and the relative potencies of 1α-OH D3 to vitamin D3 were 5.03, 2.19, 18.00, 5.14, 4.09 and 3.33, respectively. These data indicate that high levels of vitamin D3 can spare the use of P in broiler diets and that the potency of 1α-OH D3 is higher than that of vitamin D3
Authors and Affiliations
J. C. Han, H. X. Qu, J. Q. Wang, J. H. Yao, C. M. Zhang, G. L. Yang, Y. H. Cheng, X. S. Dong
Keywords
Related Articles
- EP ID EP72971
- DOI -
- Views 75
- Downloads 0
Improved performance due to dietary supplementation with selected herbal extracts of broiler chickens infected with Eimeria spp.
The aim of the study was to investigate the effect of dietary herbal extracts derived from garlic (Allium sativum), rosemary (Rosmarinus officinalis), sage (Salvia officinalis), oregano (Origanum vulgare), nettle (Urtica...
The effect of feeding raw and germinated Lupinus luteus and Lupinus angustifolius seeds on the growth performance of young pigs
Two 33-day experiments were conducted. In each experiment, fifty male pigs about 9 kg body weight were divided into five groups and fed ad libitum a mixture containing soya bean meal in the control group (SBM), whereas i...
The influence of dietary fatty acids on their metabolism in liver and subcutaneous fat in growing pigs
The aim of the study was to determine the influence of fatty acids sources on their metabolism in the liver and subcutaneous fat. Four iso-energetic and iso-protein diets with different ratio of PUFA/SFA and C 18:2 n-6/C...
Localization of kisspeptin neurons in the hypothalamus of peripubertal female lambs; possible connection with gonadotrophin releasing hormone and neuropeptide Y neurons
Hypothalamic peptide kisspeptin (kp) plays a major role in the initiation of pubertal events in mammals through the activation of gonadotrophin- -releasing hormone (GnRH) neurons. The present study was designed to analys...
Sources of omega-6 fatty acids do not alter the rumen degradation and transit of fibre from dairy cow diets
The objective of this study was to evaluate the behaviour of fibre in the digestive tract on the basis of the passage kinetics of forage and concentrate particles in cows fed different omega-6 fatty-acid sources. The sci...