不同淀粉类型日粮对育肥猪消化代谢的影响

doi:10.11843/j.issn.0366-6964.2017.12.013

Abstract

Abstract:

The aims of this study were to investigate the effects of different starch types on intestinal digestion and absorption, serum biochemical indices and hormone levels of finishing pigs. Ninety barrows ((68±2.0) kg) were randomly allocated to 3 diet treatments with 5 replicates and 6 pigs per replicate. Purified waxy maize starch (WMS), nonwaxy maize starch (NMS) and pea starch (PS) were used as the only dietary starch sources to formulate experimental diets (the amylose to amylopectin ratio were 0.07, 0.19 and 0.28, respectively). At the end of 28 days of treatments, two pigs per replicate(near to the average body weight of the replicate) were weighed, slaughtered and the samples of jejunum mucosa and blood were collected, and the target traits were detected. The results showed that:1) Dietary starch types had no significant effect on the activity of digestive enzymes in jejunum mucosa of finishing pigs (P>0.05). 2) Compared with the WMS diet, the PS diet significantly down-regulated the mRNA expression of taste receptor type 1 member 2(T1R2), taste receptor type 1 member 3(T1R3) (P<0.05), whereas significantly up-regulated the mRNA expression of solute carrier family 1 member 5 (SLC1A5) (P<0.05); the NMS diet significantly up-regulated the mRNA expression of solute carrier family 7 member 7 (SLC7A7) (P<0.05); PS and NMS diets significantly down-regulated the mRNA expression of sodium/glucose cotransporter 1 (SGLT1) and glucose transporter 2 (GLUT2) (P<0.05). 3) In the serum biochemical indices, no significant effect was observed in the plasma glucose content among groups (P>0.05). Compared with the WMS diet, PS and NMS diets significantly reduced the plasma free fatty acid content (FFA) (P<0.05). 4) No significant effect was observed in the serum hormones levels among groups (P>0.05). It could be concluded that finishing pigs fed with high amylose to amylopectin ratio diet could down-regulate the mRNA expression of sweet taste receptors and glucose transporters, up-regulate the mRNA expression of some amino acid transporters, and then decrease the absorption of glucose, be beneficial to the absorption of amino acids.

CLC Number:

S828.5

XIE Chen, LI Yan-jiao, LI Jiao-long, ZHANG Lin, GAO Feng, ZHOU Guang-hong. Effect of Dietary Starch Types on Intestinal Digestion and Metabolism of Finishing Pigs[J]. ACTA VETERINARIA ET ZOOTECHNICA SINICA, 2017, 48(12): 2337-2346.

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Effect of Dietary Starch Types on Intestinal Digestion and Metabolism of Finishing Pigs

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