Molecular Nutrition

Sodium and Chlorine Requirements of Yellow-Feathered Broilers Aged from 1 to 21 Days

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  • 1. Guangdong Key Laboratory of Animal Breeding and Nutrition/Guangdong Public Laboratory of Animal Breeding and Nutrition, The Key Laboratory of Animal Nutrition and Feed Science(South China) of Ministry of Agriculture, State Key Laboratory of Livestock and Poultry Breeding, Institute of Animal Science, Guangdong Academy of Agricultural Sciences, Guangzhou 510640, China;
    2. College of Animal Science and Animal Veterinary, Huazhong Agricultural University, Wuhan 430070, China

Received date: 2016-09-14

  Online published: 2017-03-09

Abstract

The experiment was conducted to investigate the effects of dietary sodium and chlorine levels on growth performance, excreta moisture rate, serum parameters, intestinal sodium-glucose cotransporter 1 (SGLT1), sodium-hydrogen exchanger 2 (NHE2) mRNA expression and so on of yellow-feathered broilers aged from 1 to 21 days, and to estimate the optimal dietary sodium and chlorine levels and its mechanism for yellow-feathered broilers aged from 1 to 21 days. A total of 1 200 one-day-old male broilers were randomly assigned to five groups. Each group consisted of six replicates with 40 birds per replicate in the trail. Dietary treatments included the corn-soybean meal type basal diet (control, and without additional sodium and chlorine) and the other four diets supplemented with NaCl and NaHCO3 isometric substituting part of zeolite powder (the ratio of sodium and chlorine was 1:1 in diet, and the dietary sodium and chlorine levels were 0.1%, 0.2%, 0.3% and 0.4%, respectively). Feed and water were provided ad libitum. Results showed that, dietary sodium and chlorine supplementation significantly increased the average daily gain (ADG), average daily feed intake, daily water consumption and excreta moisture rate (P<0.05), and significantly decreased the ratio of feed to gain and mortality (P<0.05) of broilers. A quadratic broken-line increasing effect of ADG (R2=0.966, P=0.009) and a quadratic effect of excreta moisture rate with increasing first and then decreasing (R2=0.954, P=0.046) were observed with increasing of dietary sodium and chlorine level, respectively. Supplementation of sodium and chlorine significantly increased serum osmotic pressure (P<0.05), reduced the contents of serum uric acid, glucose, triglyceride and total cholesterol (P<0.05), but had no significant effects on serum contents of cholecystokinin, ghrelin and somatotropin (P>0.05). 0.2% and 0.4% dietary sodium and chlorine supplementation significantly decreased mRNA expression of duodenum NHE2 and Na+-K+-ATPase activity compared with the control (P<0.05), and ileum SGLT1 mRNA expression was higher in birds fed the diet with 0.2% of dietary sodium and chlorine with respect to the control birds or birds fed 0.4% of dietary sodium and chlorine (P<0.05). In conclusion, based on the growth performance, the optimal dietary sodium and chlorine levels estimated by variance analysis and multiple comparisons for yellow-feathered broiler chicks aged from 1 to 21 days are 0.2%, but the optimal dietary sodium and chlorine levels estimated by non-linear regression model are 0.14%.

Cite this article

YU Huan, JIANG Shouqun, LIU Mei, JIANG Zongyong, LI Long, GOU Zhongyong, LIN Xiajing . Sodium and Chlorine Requirements of Yellow-Feathered Broilers Aged from 1 to 21 Days[J]. Chinese Journal of Animal Nutrition, 2017 , 29(3) : 786 -797 . DOI: 10.3969/j.issn.1006-267x.2017.03.008

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