China Animal Husbandry and Veterinary Medicine ›› 2019, Vol. 46 ›› Issue (12): 3520-3529.doi: 10.16431/j.cnki.1671-7236.2019.12.008

• Animal Nutrition and Feed Science • Previous Articles     Next Articles

Effect of Dietary Calcium or Phosphorus Deficiency on Growth Performance and Tibia Histological Structure of Broilers During 22 to 42 Days of Age

WANG Chuanlong1, XING Guanzhong2, SHAO Yuxin1, ZHANG Liyang1, LYU Lin1, LI Sufen2, LIAO Xiudong1, LUO Xugang1   

  1. 1. Mineral Nutrition Research Division, Institute of Animal Science, Chinese Academy of Agricultural Sciences, Beijing 100193, China;
    2. Department of Animal Science, Hebei Normal University of Science and Technology, Qinhuangdao 066004, China
  • Received:2019-07-30 Online:2019-12-20 Published:2019-12-21

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Abstract: This experiment was conducted to investigate the effect of dietary calcium (Ca) or phosphorus (P) deficiency on growth performance and tibia histological structure of broilers from 22 to 42 days of age based on our previous study of broilers from 1 to 21 days of age.A total of 504 one-day-old Arbor Acres male broilers were randomly assigned to 1 of 4 treatments in a completely randomized design involving a 2 (Ca levels:0.90% and 0.30%)×2 (NPP levels:0.35% and 0.18%) factorial arrangement of treatments.The 4 treatment groups were the normal control group (0.90% Ca+0.35% NPP),the P-deficient group (0.90% Ca+0.18% NPP),the Ca-deficient group (0.30% Ca+0.35% NPP) and the Ca and P-deficient group (0.30% Ca+0.18% NPP).The growth performance of broilers from 22 to 42 days of age and the tibial histological structure at 28 and 42 days of age were measured.The results showed that dietary Ca or P deficiency decreased the average daily feed intake (ADFI),average daily gain (ADG) and tibia length of broilers (P<0.05),but increased the feed to gain ratio (F/G) and the length of tibia growth plate hyperplasia area (P<0.05).Furthermore,the broilers fed the P-deficient diet had the lowest ADFI and ADG of broilers from 22 to 28 days of age and tibia length at 28 days of age compared with those fed the Ca-deficient or Ca and P-deficient diets (P<0.05).Moreover,the broilers fed the P-deficient diet had the highest mortality during days 22 to 28 compared with other treatment groups (P<0.05),and all the broilers in this group died at 28 days of age.The low Ca level increased the length of tibia growth plate hyperplasia area of broilers at 28 days of age (P<0.05),but the low P level decreased it (P<0.05).In conclusion,the growth performance and tibia histological structure of broilers from 22 to 42 days of age were the most sensitive to dietary P deficiency,followed by dietary Ca deficiency or Ca and P deficiencies;And low Ca level increased while the low P level decreased the length of tibia growth plate hyperplasia area of broilers.

Key words: Ca deficiency; P deficiency; broilers; tibia

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