文献类型： 外文期刊

作者： Cheng, L. F. ¹ ; Zhang, Q. Q. ¹ ; Zhao, W. Y. ¹ ; Chang, C. ¹ ; Wang, X. ¹ ; Yan, Z. X. ¹ ; Cao, J. ¹ ; Liu, H. G. ¹ ; Geng, A. L. ¹ ;

作者机构： 1.Beijing Acad Agr & Forestry Sci, Inst Anim Husb & Vet Med, 9 Shu Guang Garden Mid Rd, Beijing 100097, Peoples R China

2.Shandong Agr Univ, Coll Anim Sci & Technol, Tai An 271018, Shandong, Peoples R China

关键词： Calcium; Phosphorus; Performance; Follicular development; Egg quality

期刊名称：POULTRY SCIENCE （ 影响因子：4.2； 五年影响因子：4.5 ）

ISSN： 0032-5791

年卷期： 2025 年 104 卷 5 期

页码：

收录情况： SCI

摘要： The experiment aimed to study effects of dietary calcium (Ca) and non-phytate phosphorus (NPP) levels on performance, follicular development, egg quality and serum biochemical indices in native bird-Beijing You Chicken (BYC). A 3 x 3 factorial design was adopted, dietary Ca levels were 2.8 %, 3.2 % and 3.6 %, dietary NPP levels were 0.33 %, 0.38 % and 0.43 %. A total of 972, 28-wk-old BYC laying hens were randomly divided into 9 groups with 4 replicates per group, and 27 birds per replicate. The trial was conducted after 2 wks of pre-adaptation. The performance was determined during 30 similar to 35 wks, 36 similar to 41 wks and 30 similar to 41 wks; follicular development, egg quality and serum biochemical indices were determined at 41 wks of age. The results showed that dietary Ca and NPP levels alone and the interaction affected feed egg ratio (FER) of BYC during 30 similar to 35 wks (P < 0.05), the FER was the lowest (2.65 +/- 0.05) and the egg-laying rate was the highest (77.45 +/- 3.19 %) in the group with 3.6 % Ca and 0.43 % NPP. Dietary 0.33 % NPP and 0.43 % NPP increased the number of small yolk follicles (P < 0.05). Dietary 3.6 % Ca deepened the yolk color (YC) (P < 0.001), dietary NPP level affected the YC, Haugh unit (HU), relative yolk weight (RYW) and relative albumen weight (RAW) (P < 0.05). The interaction of dietary Ca and NPP levels affected eggshell color (ESC) (P < 0.05), YC (P < 0.001), and relative eggshell weight (RESW) (P < 0.001), also had the trend to affect eggshell strength (ESS) (P = 0.073), albumen height (AH) (P = 0.077) and HU (P = 0.055). 4) 0.43 % NPP had a trend to affect malondialdehyde (MDA) (P = 0.064). In summary, dietary Ca and NPP levels alone and the interaction did not affect egg production of BYC, and FER in the group with 3.6 % Ca and 0.43 % NPP seemed to be the lowest during 35 similar to 41 wks. Dietary NPP may be related to pre-graded follicular development. The recommended dietary Ca level is 3.6 % and NPP level is 0.43 % for BYC during the peak laying period. The Ca/NPP ratio in the range of 8.39 similar to 9.67 may be beneficial to laying performance and egg quality of laying hens.