A Study of Relative Bioavailability of Mono-Dicalcium Phosphate on Broilers

WAN Minyan, ZHANG Baohai, WANG Hongbo, TANG Defu

doi:10.3969/j.issn.1006-267x.2018.09.003

Chinese Journal of Animal Nutrition >

2018 , Vol. 30 >Issue 9: 3353 - 3363

DOI: https://doi.org/10.3969/j.issn.1006-267x.2018.09.003

Molecular Nutrition

A Study of Relative Bioavailability of Mono-Dicalcium Phosphate on Broilers

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College of Animal Science and Technology, Gansu Agricultural University, Lanzhou 730070, China

Received date: 2018-02-12

Online published: 2018-09-20

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Abstract

This experiment was to study the effects of dicalcium phosphate (DCP) and mono-dicalcium phosphate (MDCP) on growth performance, tibia indices and serum biochemical indices of broilers, and to assess the relative bioavailability of MDCP with DCP as the control. The experiment used a 2×6 two factor randomized block design, diets contained 2 phosphate sources (DCP and MDCP) and 6 phosphate supplemental levels (0, 0.05%, 0.10%, 0.15%, 0.20% and 0.25%). A total of 990 one-day old Cobb male broilers were randomly divided into 11 groups (control group shared) with 6 replicates per group and 15 broilers per replicate. The experiment lasted for 21 days. The results showed that there were not significant interactions between phosphate source and phosphate supplemental level for growth performance, nutrient apparent metabolic rate, tibia indices and serum biochemical indices of broilers (P>0.05). The feed intake, body weight gain, tibia ash content and serum phosphorus content of broilers in MDCP supplemental group were significantly higher than those in DCP supplemental group (P<0.05), but the serum alkaline phosphatase activity was significantly lower than that in DCP supplemental group (P<0.05). With the phosphate supplemental level increasing, the feed intake, body weight gain of broilers were significantly improved (P<0.05), the ratio of feed to gain and mortality were significantly decreased (P<0.05). The calcium apparent metabolic rate in 0.25% supplemental group was significantly higher than that in control group and 0.05% supplemental group (P<0.05), and the phosphorus metabolic rate, tibia calcium content, tibial phosphorus content and tibial strength in 0.25% supplemental group were significantly higher than those in control group (P<0.05). With the phosphate supplemental level increasing, the serum phosphorus content was significantly increased (P<0.05), but the serum alkaline phosphatase activity was significantly decreased (P<0.05). According to body weight gain, tibia indices and serum biochemical indices of broilers, the bioavailability for broilers of MDCP relative to DCP (100%) is 112.5%.

Key words： broilers; MDCP; DCP; bioavailability

Cite this article

WAN Minyan, ZHANG Baohai, WANG Hongbo, TANG Defu . A Study of Relative Bioavailability of Mono-Dicalcium Phosphate on Broilers[J]. Chinese Journal of Animal Nutrition, 2018 , 30(9) : 3353 -3363 . DOI: 10.3969/j.issn.1006-267x.2018.09.003

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