Effects of Diets with Different Calcium and Phosphorus Levels on Growth Performance, Nutrient Digestibility, Calcium and Phosphorus Metabolism of 12 to 15 Months Old Sika Deer

SUN Weili; ZHAO Haiping; WANG Xiaoxu; FAN Yanyan; BAO Kun; WANG Yanmei; LI Guangyu

doi:10.3969/j.issn.1006-267x.2016.12.029

2016 , Vol. 28 >Issue 12: 3952 - 3961

DOI: https://doi.org/10.3969/j.issn.1006-267x.2016.12.029

Molecular Nutrition

Effects of Diets with Different Calcium and Phosphorus Levels on Growth Performance, Nutrient Digestibility, Calcium and Phosphorus Metabolism of 12 to 15 Months Old Sika Deer

SUN Weili ,
ZHAO Haiping ,
WANG Xiaoxu ,
FAN Yanyan ,
BAO Kun ,
WANG Yanmei ,
LI Guangyu

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1. Jilin Provincial Key Laboratory for Molecular Biology of Special Economic Animals, Institute of Special Animal and Plant Sciences, Chinese Academy of Agriculture Sciences, Changchun 130112, China;
2. Changchun Sci-Tech University, Changchun 130600, China

Received date: 2016-05-16

Online published: 2016-12-17

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Abstract

This experiment aimed to study the effects of diets with different calcium and phosphorus levels on growth performance, nutrient digestibility, calcium and phosphorus metabolism of 12 to 15 months old sika deer, in order to confirm the appropriate calcium and phosphorus levels for 12 to 15 months old sika deer. Sixteen healthy male sika deer of similar hereditary were randomly divided into four groups, and the difference in body weight was not significant among groups (P>0.05). Each group contained four replicates and each replicate had one deer. The levels of calcium and phosphorus in the four groups were 0.49% and 0.33% (group Ⅰ), 0.82% and 0.56% (group Ⅱ), 1.16% and 0.80% (group Ⅲ), 1.61% and 1.12% (group Ⅳ), respectively. The experimental period was from May 15th, 2015 to August 7th, 2015. The results showed as follows:1) there were no significant differences in body weight, average daily gain (ADG), average daily feed intake (ADFI) and feed weight ratio (F/G) of 12 to 15 months old sika deer in different time among four groups (P>0.05). From the whole experimental period, the growth performance of group Ⅳ was better than other three groups. 2) Serum calcium level in group Ⅲ was significantly lower than that in groups Ⅰ and Ⅳ on the 30th day (P<0.05), but there was no significant difference among four groups on the other time points (the 1st day, the 60th day and the 83rd day) (P>0.05). As the extension of experimental time, serum calcium level in groups Ⅰ, Ⅱ and Ⅲ had no significant change (P>0.05), but the group Ⅳ showed a gradually upward trend, and obtained the highest value of 2.415 nmol/L on the 83rd day which significantly higher than the value of 2.280 nmol/L on the 1st day (P<0.05). There was no significant difference in serum phosphorus level among different groups on the same time point (P>0.05), and the serum phosphorus level in each group had no significant change on different time points (P>0.05). Serum magnesium level in group Ⅰ was significantly higher than that in groups Ⅲ and Ⅳ on the 1st day (P<0.05), and significantly higher than that in group Ⅲ on the 30th day (P<0.05). As the extension of experimental time, serum magnesium level in groups Ⅰ, Ⅱ and Ⅲ had no significant change (P>0.05), but the group Ⅳ showed a trend of first increasing and then decreasing and it on the 30th day and the 60th day was significantly higher than that on the 1st day and the 83rd day (P<0.05).3) Serum testosterone and estradiol levels showed no significant changes in each group (P>0.05), and serum parathyroid hormone, osteocalcin levels and alkaline phosphatase activity also showed no significant changes with the calcium and phosphorus levels increasing (P>0.05).4) During the whole experimental period, the digestibility of crude protein, crude fat, calcium and phosphorus in the group Ⅲ was the highest, and the digestibility of calcium and phosphorus was 51.08% and 67.71%, respectively. In conclusion, dietary calcium and phosphate levels have no significant effects on the serum sex hormone, calcium, magnesium and phosphate levels of 12 to 15 months old sika deer, but the nutrient digestibility is the highest in group Ⅲ, so it is recommended that diet with 1.16% calcium and 0.80% phosphorus is suitable for 12 to 15 months old sika deer.

Key words： sika deer; calcium; phosphorus; growth performance; serum biochemical indices; digestibility

Cite this article

SUN Weili , ZHAO Haiping , WANG Xiaoxu , FAN Yanyan , BAO Kun , WANG Yanmei , LI Guangyu . Effects of Diets with Different Calcium and Phosphorus Levels on Growth Performance, Nutrient Digestibility, Calcium and Phosphorus Metabolism of 12 to 15 Months Old Sika Deer[J]. Chinese Journal of Animal Nutrition, 2016 , 28(12) : 3952 -3961 . DOI: 10.3969/j.issn.1006-267x.2016.12.029

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