Acta Veterinaria et Zootechnica Sinica ›› 2023, Vol. 54 ›› Issue (12): 5091-5100.doi: 10.11843/j.issn.0366-6964.2023.12.019

• ANIMAL NUTRITION AND FEEDS • Previous Articles     Next Articles

Effects of Sodium Humate on Nutrient Apparent Digestibility, Fecal Microorganisms and Their Metabolites in White-feathered Broilers

LI Zhenming1, YU Miao1,2, TANG Yantian1, LI Yuanfei1, LIU Zhichang1, RONG Ting1,3*, MA Xianyong1,2*   

  1. 1. Guangdong Engineering Technology Research Center of Animal Meat Quality and Safety Control and Evaluation, Guangdong Public Laboratory of Animal Breeding and Nutrition, Key Laboratory of Animal Nutrition and Feed Science in South China, Ministry of Agriculture, State Key Laboratory of Swine and Poultry Breeding Industry, Institute of Animal Science, Guangdong Academy of Agricultural Sciences, Guangzhou 510640, China;
    2. Maoming Branch, Guangdong Laboratory for Lingnan Modern Agricultural Science and Technology, Maoming 525000, China;
    3. Qingyuan Hongshun Agriculture and Animal Husbandry Co. Ltd., Qingyuan 511500, China
  • Received:2023-05-11 Online:2023-12-23 Published:2023-12-26

Abstract: The objective of the study was to investigate the effects of dietary supplementation with sodium humate on nutrient apparent digestibility, fecal microbial population and their metabolites in broilers. A total of 540 one-day-old 817 white-feathered broilers were selected for the trial and randomly divided into 3 groups (6 replicates per group, 30 birds per replicate). The control group was fed the basal diet and the test group was fed the test diets containing 0.3% and 0.5% sodium humate, respectively. The trial lasted for 42 days, and 3 days before the end of the trial, 2 broilers with similar body weight were selected from each replicate and were put into metabolic cages for metabolic tests. The results showed that: 1)Compared with the control group, dietary supplementation of 0.5% sodium humate significantly increased apparent digestibility of crude protein, phosphorus and ash (P<0.05) in broilers. 2)Compared with the control and 0.3% groups, dietary supplementation with 0.5% sodium humate significantly increased total bacteria and Lactobacillus concentrations (P<0.05) and decreased Escherichia coli concentrations (P<0.05) in broiler manure. Compared with the 0.3% group, dietary supplementation with 0.5% sodium humate significantly increased Prevotella concentration (P<0.05) in broiler manure. 3)Compared with the control group, dietary supplementation with 0.5% sodium humate significantly decreased ammoniacal nitrogen concentrations (P<0.05) and increased lactic acid concentrations (P<0.05) in broiler manure. Compared with the control and 0.3% groups, dietary supplementation with 0.5% sodium humate significantly decreased p-cresol concentrations (P<0.05) in broiler manure. 4) Compared with the control and 0.3% groups, dietary supplementation with 0.5% sodium humate significantly decreased tyramine, spermidine, spermidine and total amines concentrations (P<0.05) in broiler manure. Compared with the control group, dietary supplementation with 0.3% and 0.5% sodium humate significantly decreased putrescine concentrations (P<0.05) in broiler manure; Additionally, dietary supplementation with 0.3% sodium humate significantly decreased tyramine and spermine concentrations (P<0.05) in broiler manure. Therefore, dietary supplementation with sodium humate can improve nutrient apparent digestibility in broilers, promote beneficial bacteria growth and reproduction, increase lactic acid concentrations, inhibite harmful bacteria growth and reproduction, and then decrease ammonia nitrogen, p-cresol and biogenic amines and other odorous substances in manure, thus achieve the goal of pollution source reduction, and under the current condition, supplementation with 0.5% was more effective than 0.3%.

Key words: broiler, sodium humate, apparent digestibility, manure, microorganisms, biogenic amines

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