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第178期 保育猪日粮中钠氯的来源与水平对生长性能的影响

2019-3-5 16:48| 发布者: 畜牧编辑| 查看: 1707| 评论: 0|原作者: 29625248



2019. J. Anim. Sci. 97(2):745-755
保育猪日粮中钠氯的来源与水平对生长性能的影响

Dwight J Shawk, Mike D Tokach, Robert D Goodband, Steve S Dritz, Jason C Woodworth, Joel M DeRouchey, Annie B Lerner, Fangzhou Wu, Carine M Vier, Madison M Moniz, Kayla N Nemechek

      本研究开展3个试验研究7-12kg猪日粮中钠氯的来源与水平对生长性能的影响在所有试验中仔猪断奶后7-8d饲喂同样的基础日粮0.33%钠0.77%氯然后随机分?#31918;?#22788;理组

      试验一360头不同性别的仔猪进行14天的试验每个处理15个重复每个圈6头猪试验处理包括一个10%乳清粉+盐日粮0.37%钠0.75%氯三个7.2%乳糖的日粮分别添加0.35%盐0.18%钠和0.47%氯0.78%盐0.35%钠和0.72%氯或者添加1.15%小苏打和0.4%氯化钾0.35%钠和0.45%氯0.78%盐+乳糖组猪只日增重显著高于0.35%盐+乳糖组其它处理日增重在这两组之间

      试验二使用360头去势公猪试验期14天每个处理12个重复每圈5头猪试验处理包括两个添加盐的处理分别提供0.13%钠0.35%氯或0.57%钠和0.68%氯另外两个日粮钠和氯由氯化钾和小苏打提供分别为0.13%钠和0.35%氯0.57%钠和0.5%氯还有一个日粮添?#26377;?#33487;打和氯化钙0.35%钠和0.5%氯无论钠的来源猪日增重和采食量随着钠水平从0.13%到0.35%而增加二次线性P0.05未观察到其它作用效果氯化钠和小苏打处理之间没有显著性相同钠和氯浓度但是不同来源之间也没有显著性

      试验三使用3300头仔猪进行21天试验每个处理10个重复每个重复5头猪对照组日粮中添加有盐提供0.33%钠和0.55%氯其它五个处理中钠含量为0.33%通过添加氯化钾提供0.09%0.210.320.450.55%氯随着氯含?#30475;?.09%提高至0.32%猪的日增重和肉料比显著提高二次线性P0.035对照组和0.55%氯组日增重相似对于日增重和采食量来说折线模型的结果发现最适氯水平为0.23%对于肉料比来说二次多项式模型发现氯的最适添加量为0.38%

      总之7-12kg猪日粮中添加最少0.35%钠和0.38%氯可以获得更好的日增重和肉料比并且本试验中使用的不同来源钠和氯之间没有差异

Effects of sodium and chloride source and concentration on nursery pig growth performance

Dwight J Shawk, Mike D Tokach, Robert D Goodband, Steve S Dritz, Jason C Woodworth, Joel M DeRouchey, Annie B Lerner, Fangzhou Wu, Carine M Vier, Madison M Moniz, Kayla N Nemechek

Three studies were conducted to determine the effects of source and concentration of Na and Cl on pig growth performance from 7 to 12 kg. In all three experiments, pigs were fed a common diet (0.33% Na and 0.77% Cl) for 7 or 8 d after weaning then randomly assigned to dietary treatments. In Exp. 1, 360 mixed-sex pigs were used in a 14-d study with 15 replications per treatment and six pigs per pen. Treatments included a 10% dried whey diet with 0.60% added salt (0.37% Na and 0.75% Cl); or three diets with 7.2% crystalline lactose with either: 0.35% added salt (0.18% Na and 0.47%Cl); 0.78% added salt (0.35% Na and 0.72% Cl); or 1.15% NaHCO3 and 0.40% KCl (0.35% Na and 0.45% Cl). Pigs fed the 0.78% added salt-lactose diet had greater(P < 0.05) ADG than pigs fed the 0.35% added salt-lactose diet, with others intermediate. In Exp. 2, 360 barrows were used in a 14-d study with 12 replications per treatment and five pigs per pen. Treatments included two added salt diets (providing 0.13% Na and 0.35% Cl or 0.35% Na and 0.68% Cl), three diets with Na and Cl provided by KCl and NaHCO3 (0.13%, 0.35%, or 0.57% Na and 0.50% Cl), or a diet with NaHCO3 and CaCl2 (0.35% Na and 0.50% Cl). Regardless of Na source, ADG and ADFI increased (quadratic, P < 0.05) as dietary Na increased from 0.13% to 0.35%, with no further benefits observed thereafter. There was no evidence for differences among pigs fed NaCl or NaHCO3 nor evidence for differences among pigs fed the different Na and Cl sources at similar concentrations. In Exp. 3, 300 pigs were used in a 21-d trial with 10 replications per treatment and five pigs per pen. Treatments included a control diet with added salt to provide 0.33% Na and 0.55% Cl or five diets with 0.33 % Na and added KCl to provide 0.09, 0.21, 0.32, 0.45, or 0.55% Cl. ADG and G:F increased (quadratic, P < 0.035) as Cl increased from 0.09% to 0.32%. Pigs fed the control diet (added salt) and the 0.55% Cl diet had similar ADG. For ADG and ADFI, the broken line linear model indicated a breakpoint of 0.23% Cl. For G:F, the quadratic polynomial model suggested the maximum at 0.38% Cl. Inconclusion, 7 to 12 kg pigs fed diets that contained at least 0.35% Na and0.38% Cl had greater ADG and G:F compared to pigs fed diets with lower concentrations and minimal effects were observed among the sources of Na or Cl used in these studies.


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