动物营养学报2017，Vol.29Issue(3)：786-797,12.DOI:10.3969/j.issn.1006-267x.2017.03.008
1～21日龄黄羽肉鸡钠、氯的需要量
Sodium and Chlorine Requirements of Yellow-Feathered Broilers Aged from 1 to 21 Days
摘要
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 as signed 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 NaC1 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 nonlinear regression model are 0.14％.关键词
黄羽肉鸡/钠/氯/营养需要量Key words
yellow-feathered broilers/sodium/chlorine/nutrient requirement分类
农业科技引用本文复制引用
于欢,蒋守群,刘梅,蒋宗勇,李龙,苟钟勇,林厦菁..1～21日龄黄羽肉鸡钠、氯的需要量[J].动物营养学报,2017,29(3):786-797,12.基金项目
国家肉鸡产业技术体系项目(CARS-42) （CARS-42）
国家“十二五”科技支撑计划项目子课题(2014BAD13B02) （2014BAD13B02）
广东省科技攻关项目(2013B020306002) （2013B020306002）
