Effects of Dietary Calcium and Non-Phytate Phosphorus Levels on Growth Performance and Tibial Characteristics of Slow-Growing Yellow-Feathered Broilers Aged from 29 to 56 Days

WANG Yibing; WANG Weiwei; ZHANG Sheng; GOU Zhongyong; LI Long; LIN Xiajing; FAN Qiuli; YE Jinling; JIANG Shouqun

doi:10.3969/j.issn.1006-267x.2020.12.019

2020 , Vol. 32 >Issue 12: 5659 - 5666

DOI: https://doi.org/10.3969/j.issn.1006-267x.2020.12.019

Effects of Dietary Calcium and Non-Phytate Phosphorus Levels on Growth Performance and Tibial Characteristics of Slow-Growing Yellow-Feathered Broilers Aged from 29 to 56 Days

WANG Yibing ,
WANG Weiwei ,
ZHANG Sheng ,
GOU Zhongyong ,
LI Long ,
LIN Xiajing ,
FAN Qiuli ,
YE Jinling ,
JIANG Shouqun

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Institute of Animal Science, Guangdong Academy of Agricultural Sciences, State Key Laboratory of Livestock and Poultry Breeding, Key Laboratory of Animal Nutrition and Feed Science in South China, Ministry of Agriculture and Rural Affairs, Guangdong Key Laboratory of Animal Breeding and Nutrition, Guangzhou 510640, China

Received date: 2020-05-19

Online published: 2020-12-07

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Abstract

This experiment was conducted to investigate the effects of dietary calcium (Ca) and non-phytate phosphorus (NPP) levels on growth performance and tibial characteristics of slow-growing yellow-feathered broilers aged from 29 to 56 days. A total of 720 twenty-nine-day-old yellow-feathered female broilers were used, a 3 (Ca level)×3 (NPP level) factorial design was used, dietary Ca levels were 0.75%, 0.85% and 0.95%, respectively, and NPP levels were 0.35%, 0.40% and 0.45%, respectively, and there were 9 treatments with 4 replicates per treatment and 20 birds per replicate. The experiment lasted for 28 days. The results showed as follows: 1) dietary Ca and NPP levels had no significant effects on growth performance (P>0.05), bud dietary Ca level had a tendency to affect the feed to gain ratio (P=0.080); dietary Ca and NPP levels had a significant interaction on the feed to gain ratio (P<0.05), when dietary Ca level of 0.75%, NPP level of 0.35% and Ca level of 0.85%, NPP level of 0.45%, the feed to gain ratio was the lowest, and significantly lower than that when dietary Ca level of 0.85%, NPP level of 0.35% and Ca level of 0.95%, NPP level of 0.35% (P<0.05). 2) Dietary Ca level had significant effect on the tibial length (P<0.05), the main effect analysis showed that the tibial length when dietary Ca level of 0.75% and 0.85% was significantly higher than that when dietary Ca level of 0.95% (P<0.05). Dietary NPP had significant effect on the perimeter, broken strength and density of tibia (P<0.05), the main effect analysis showed that the perimeter, broken strength and density of tibia when dietary NPP of 0.35% were significantly higher than those when dietary NPP of 0.40% and 0.45% (P<0.05). Dietary NPP level had significant interactions on the perimeter, broken strength and density of tibia (P<0.05). In conclusion, under the experimental conditions, dietary Ca and NPP levels affect the tibial characteristics of slow-growing yellow-feathered broilers aged from 29 to 56 days, and have interaction effects, comprehensive the tibial index and growth performance, the recommended dietary Ca and NPP levels are 0.75% and 0.35%, respectively.

Key words： calcium; non-phytate phosphorus; slow-growing yellow-feathered broilers; growth performance; tibial characteristics; interaction

Cite this article

WANG Yibing , WANG Weiwei , ZHANG Sheng , GOU Zhongyong , LI Long , LIN Xiajing , FAN Qiuli , YE Jinling , JIANG Shouqun . Effects of Dietary Calcium and Non-Phytate Phosphorus Levels on Growth Performance and Tibial Characteristics of Slow-Growing Yellow-Feathered Broilers Aged from 29 to 56 Days[J]. Chinese Journal of Animal Nutrition, 2020 , 32(12) : 5659 -5666 . DOI: 10.3969/j.issn.1006-267x.2020.12.019

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