第111期：哺乳母猪日粮中添加硬脂酰乳酸钠对生产性能、消化率、乳组成及乳中脂滴大...

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2017. J. Anim. Sci. 95(11): 5091-5099

哺乳母猪日粮中添加硬脂酰乳酸钠对生产性能、消化率、乳组成及乳中脂滴大小的影响

C. Q. Wang, Y. S. Bai, X. Zhao, B. M. Shi, X. Y. Meng and A. S. Shan

本试验的主要目的在于研究哺乳母猪日粮中（有豆油或无豆油）添加硬脂酰乳酸钠对生产性能、消化率、乳组成及乳中脂滴大小的影响。试验选用60头母猪（大白×长白），随机分为4组，试验为2（豆油添加量0%或3%）×2（0%或0.1%硬脂酰乳酸钠）双因素试验设计。每个处理15头母猪（1头母猪1个重复）。哺乳期间，添加豆油和硬脂酰乳酸钠组母猪背膘厚度损失较少（P＜0.05）。与未添加豆油组相比，日粮中添加3%豆油采食量较低（P＜0.05），但是对能量摄入量和发情间隔没有明显影响，并且与添加日粮硬脂酰乳酸钠没有明显互作（P＞0.05）。添加豆油和硬脂酰乳酸钠组对粗脂肪的消化率要高于只添加豆油组母猪（P＜0.05）。此外，添加豆油和硬脂酰乳酸钠组母猪对粗蛋白、钙磷的消化率也高于其它组（P＜0.05）。添加豆油和硬脂酰乳酸钠组母猪哺乳第11天时乳脂、乳蛋白和总固形物含量高于其它组（P＜0.05）。同时豆油和硬脂酰乳酸钠对乳脂和总固形物含量有互作。日粮中添加0.1%硬脂酰乳酸钠可以显著降低哺乳第11天乳中脂肪颗粒平均粒径（P＜0.05）。日粮处理对母猪血浆中胆固醇、甘油三酯、高密度脂蛋白胆固醇、低密度脂蛋白胆固醇无显著影响。总之，哺乳母猪日粮中添加0.1%硬脂酰乳酸钠可能降低乳中脂滴的大小，并改善母猪消化率和乳汁组成。

Effects of feeding sodium stearoyl-2-lactylate diets to lactating sows on performance, digestibility of nutrients, composition, and fat globule size in milk

C. Q. Wang, Y. S. Bai, X. Zhao, B. M. Shi, X. Y. Meng and A. S. Shan

The objective of this study was to determine the effects of feeding sodium stearoyl-2-lactylate (SSL) as a new feeding emulsifier diet with and without soybean oil (SO) on the milk fat globule (MFG) size, milk composition, digestibility of nutrients, and performance in lactating sows. Sixty sows (Large White × Landrace) were randomly assigned to 1 of 4 treatments according to a 2 × 2 factorial arrangement of treatments. Each treatment had 15 replicates composed of 1 sow. The factors included 1) the fat level (0% vs. 3% SO) and 2) the emulsifier content (0% vs. 0.1% SSL). Treatments included 1) Control (without SO and SSL), 2) SO (3% SO without SSL), 3) SSL (0.1% SSL without SO), and 4) SO + SSL (3% SO and 0.1% SSL). During the suckling period, sows in the SO + SSL group lost less back fat thickness (P< 0.05) compared to other groups; sows fed 3% SO diets consumed less feed (P< 0.05) compared to sows fed diets without SO, but there were no significant effects (P > 0.05) of dietary fat and its interaction with a dietary emulsifier on energy intake and the weaning-estrus interval. The digestibility of ether extract in the SO + SSL group was greater than in the SO group (P <0.05). Moreover, greater digestibility of CP, Ca, and P in the SO+SSL group was observed compared to that of other groups (P < 0.05). Feeding the SO + SSL diet improved the concentrations of milk fat, protein, and total solids on d 11 of lactation compared to other diets (P < 0.05). Also, an interaction between supplemental SSL and SO was observed for the milk fat and total solids concentrations. The average diameter of MFG on d 11 of lactation was significantly decreased by the addition of 0.1% SSL compared to a diet with no SSL supplementation (P < 0.05). No significant differences among the dietary treatments were observed in cholesterol, triglyceride, high-density lipoprotein cholesterol, or low-density lipoprotein cholesterol in sows’ plasma (P >0.05). In conclusion, feeding a 0.1% SSL diet to lactating sows may decrease the average diameter of MFG and improve the digestibility of nutrients and composition of milk.

翻译：朱滔     来源：猪营养国际论坛CSIS