Acta Veterinaria et Zootechnica Sinica ›› 2020, Vol. 51 ›› Issue (6): 1306-1319.doi: 10.11843/j.issn.0366-6964.2020.014

• ANIMAL NUTRITION AND FEEDS • Previous Articles     Next Articles

Effects of Different Dietary Mono-dicalcium Phosphate Supplementation on Production Performance, Blood Parameters, Bone Calcium, Phosphorus Metabolism and Cecal Microecology in Broilers

LIU Jing1, CHEN Bingdian1,2, LI Zhongrong1, HE Shuying3, ZHANG Shizhong1, QIU Hualing1, MIAO Furong1, CHEN Zhuo4, CHEN Xinzhu1,2*   

  1. 1. Animal Husbandry and Veterinary Medicine Institute, Fujian Academy of Agricultural Sciences, Fuzhou 350013, China;
    2. Fujian Xinminke Biology Science and Technology Development Co., Ltd., Fuzhou 350008, China;
    3. Sinochem Yunlong Co., Ltd., Chengdu 655204, China;
    4. Business Administration College, Fujian Business University, Fuzhou 350016, China
  • Received:2020-01-07 Online:2020-06-25 Published:2020-06-23

Abstract: The purpose of this experiment was to study the effects of mono-dicalcium phosphate (MDCP) on growth performance, serum biochemical indices, tibia indices, metabolism of calcium and phosphorous in bone and cecal microecology of AA broilers and to evaluate the appropriate level of addition for the complete replacement of dicalcium phosphate (DCP) with MDCP in diet. A total of 450 one-day old AA broilers were randomly divided into 5 groups. DCP was used as the control group(CK). Four levels of MDCP were used to replace DCP to provide non-phytate phosphorus which was provided 60%, 80%, 100%, and 120% of the total non-phytate phosphorus labeled as treatment 1 (T1), treatment 2(T2), treatment 3(T3) and treatment 4(T4), respectively, with 6 replicates per group and 15 broilers per replicate for a 42-day trial period. Metabolic traits were conducted from day 19 to 21 and day 39 to 41, respectinely. Data of production performance, blood samples, and cecal microbes were collected and analyzed on 21 and 42 d, respectively. The results showed as follows:1) Compared with the CK group, the MDCP test groups improved the performance of broilers at 21 and 42 d significantly (P<0.05), and T2 group had the highest European index. 2) The apparent metabolic rate of calcium and phosphorus were decreased significantly in T2, T3 and T4 groups (P<0.05) at 21 d, and was increased significantly in T1 and T2 groups at 42 d (P<0.05). 3) Tibia calcium content of T1 group was significantly increased and phosphorus and maximum stress were significantly decreased at 21 d compared with CK group (P<0.05), tibia calcium and phosphorus content of T3 group were significantly increased compared with CK and T1 group at 42 d (P<0.05), the maximum stress of T2 and T3 group were significantly higher than the other groups at 42 d (P<0.05). 4) Compared with CK group, the blood phosphorus content was significantly decreased in T1 group (P<0.05), and was significantly increased in T4 group (P<0.05). 5) The results of high-throughput sequencing of cecal microbes in broiler chickens showed that there were significant differences in cecal microbes between the CK group and the T1-T4 groups, and the clustering distance was farther at 21 d. The diversity of cecal microbes at 42 d was significantly higher than at 21 d. The results of various indicators showed that MDCP could replace DCP as a source of non-phytate phosphorus in broiler chickens. According to European index, tibia indices, serum biochemical indices and cecal microbes of broilers, the MDCP at 80% replacement level had the best performance.

Key words: broiler, mono-dicalcium phosphate (MDCP), dicalcium phosphate (DCP), growth performance, serum biochemical indices, cecal microbes

CLC Number: