Effects of Dietary Vitamin D and Calcium Levels on Growth Performance, Nutrient Digestibility and Nitrogen Metabolism of Growing Minks

WANG Jing, ZHANG Haihua, XU Yi, LI Rende, ZHANG Xuelei, CUI Hu, NIE Hao, LI Guangyu

doi:10.3969/j.issn.1006-267x.2017.11.046

2017 , Vol. 29 >Issue 11: 4216 - 4226

DOI: https://doi.org/10.3969/j.issn.1006-267x.2017.11.046

Molecular Nutrition

Effects of Dietary Vitamin D and Calcium Levels on Growth Performance, Nutrient Digestibility and Nitrogen Metabolism of Growing Minks

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1. State Key Laboratory of Molecular Biology of Special Economic Animals, Institute of Special Wild Economic Animals and Plants, Chinese Academy of Agricultural Sciences, Changchun 130112, China;
2. Institute of Feed Research, Chinese Academy of Agriculture Science, Beijing 100081, China

Received date: 2017-04-18

Online published: 2017-10-31

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Abstract

The aim of this experiment was to investigate the effects of dietary vitamin D and calcium levels on growth performance, nutrient digestibility and nitrogen metabolism of growing mink at a fixed ratio of calcium to phosphorus. One hundred and seventeen healthy short black male minks at the age of (60±5) days with the similar body weight were randomly divided into 9 groups with 13 replicates per group and 1 mink per replicate. Nine experimental diets were formulated by using 3×3 double factorial experiment design. Dietary calcium to phosphorus ratio was fixed at 2, and three vitamin D levels were 2 100, 4 100 and 6 100 IU/kg, respectively, while three calcium levels were 2.3%, 2.7% and 3.1%, respectively. The levels of calcium and vitamin D in the 9 diets were 2.3% and 2 100 IU/kg (group Ⅰ), 2.3% and 4 100 IU/kg (group Ⅱ), 2.3% and 6 100 IU/kg (group Ⅲ), 2.7% and 2 100 IU/kg (group Ⅳ), 2.7% and 4 100 IU/kg (group Ⅴ), 2.7% and 6 100 IU/kg (group Ⅵ), 3.1% and 2 100 IU/kg (group Ⅶ), 3.1% and 4 100 IU/kg (group Ⅷ), 3.1% and 6 100 IU/kg (group Ⅸ), respectively. The pretrial lasted for 13 days, and the formal trial lasted for 60 days. The results showed as follows:1) dietary vitamin D and calcium levels had extremely significant effects on the final weight, average daily gain and feed/gain (P<0.01), and the final weight and average daily gain was the highest in group Ⅷ, the lowest in groupⅠ, feed/gain ratio was just the opposite. 2) There was an extremely significant difference in the fat digestibility of growing minks among groups (P<0.01), and the fat digestibility in groups Ⅱ, Ⅳ and Ⅴ was extremely significantly higher than those in groups Ⅶ and Ⅷ (P<0.01). The dry matter output of growing minks was significantly affected by the dietary calcium level (P<0.05), and it reached the highest when the dietary calcium level was 3.1%. The fat digestibility of growing minks was extremely significantly affected by the dietary calcium level (P<0.01), and it was extremely significantly lower when the dietary calcium level was 3.1% than that when the dietary calcium level was 2.3% and 2.7% (P<0.01). Dietary vitamin D level extremely significantly affected the dry matter output of growing minks (P<0.01), and it reached the lowest when the dietary vitamin D level was 4 100 IU/kg. Dietary vitamin D level significantly affected the dry matter digestibility and fat digestibility of growing minks (P<0.05), and both of them reached the highest when the dietary vitamin D level was 4 100 IU/kg. 3) Dietary calcium level had a significant effect on the nitrogen deposition of growing minks (P<0.05). And nitrogen deposition showed a tendency to increase with the increase of dietary calcium level, and it was the highest at the 3.1% calcium level. Dietary vitamin D level had significant effects on net protein utilization and protein biological value of growing minks (P<0.05), and both of them reached the highest when the dietary vitamin D level was 4 100 IU/kg. Dietary vitamin D and calcium levels had significant interaction effects on the net protein utilization and protein biological value of growing minks (P<0.05), and the highest values of them were found in the group Ⅷ. Comprehensive analysis of various indicators, when the dietary calcium to phosphorus ratio of is 2, the vitamin D level is 4 100 IU/kg, and the calcium level is 3.1%, growing minks can get the better growth performance, and the higher nutrient digestibility and nitrogen utilization in the present study.

Key words： vitamin D; calcium; phosphorus; mink; growth performance; nitrogen metabolism

Cite this article

WANG Jing, ZHANG Haihua, XU Yi, LI Rende, ZHANG Xuelei, CUI Hu, NIE Hao, LI Guangyu . Effects of Dietary Vitamin D and Calcium Levels on Growth Performance, Nutrient Digestibility and Nitrogen Metabolism of Growing Minks[J]. Chinese Journal of Animal Nutrition, 2017 , 29(11) : 4216 -4226 . DOI: 10.3969/j.issn.1006-267x.2017.11.046

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