ACTA VETERINARIA ET ZOOTECHNICA SINICA ›› 2015, Vol. 46 ›› Issue (4): 665-671.doi: 10.11843/j.issn.0366-6964.2015.04.022

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Effect of Acidifier on Intestinal Villus Morphology,Nutrient Digestibility,N,P Excretion of Growing Mink

WANG Kai-ying,BAO Kun,XU Chao,WANG Xi-guo,YUE Zhi-gang,LI Guang-yu*   

  1. (Institute of Special Wild Economic Animal and Plant Sciences,Chinese Academy of Agricultural Sciences,Jilin 132109,China)
  • Received:2014-04-30 Online:2015-04-23 Published:2015-04-23

Abstract:

The experiment was carried out to investigate the effect of acidifiers with different levels in the same basal diet on intestinal villus morphology,nutrient digestibility and N,P excretion in growing mink.One hundred black male minks were randomly allotted into 10 treatment groups.Every group consisted of 10 minks.The control was fed conventional fresh diet,the testing groups were added acidifier,phosphoric acid 0.4%(Ⅱ),0.6% (Ⅲ) and 0.8%(Ⅳ),citric acid 0.5%(Ⅴ),1.0%(Ⅵ) and 1.5%(Ⅶ),lactic acid 0.5%(Ⅷ),1.0%(Ⅸ) and 1.5%(Ⅹ),respectively.The results indicated that there were no significantly difference (P>0.05) in the DMI and digestibility of DM,CP and Ca among groups,but there were clearly increasing tendencies for these with acidifiers adding.The EE digestibility in groupⅠ and Ⅳ were significantly higher than that in group Ⅴ,Ⅸ,Ⅹ(P<0.05).The P digestibility in group Ⅷ and Ⅸ were higher than that in other groups(P<0.01),and Ⅸ group was the best.The height of intestinal villus was similar(P >0.05) among groups,and Ⅷ group was the highest,it was 145.8% and 120.3% compared to group Ⅲ and Ⅰ.The average surface area of intestinal villus had not significantly different(P>0.05) among groups,however,it in Ⅷ group were 160.24% and 131.77% respectively to group Ⅲ and Ⅰ.There were no significantly different (P>0.05) in the density of intestinal villus;The N excrention was similar(P>0.05) among groups and the decrease tendencies with acidifiers addition was clearly,the group Ⅰ was higher 34.02% than group Ⅷ.The quantity of P excrention was significantly different (P<0.001),group Ⅷ was the lowest and fewer 57.33% than group Ⅰ.The results showed that it can significantly improve the activity of nutrient digestion and intestinal villus morphology and decrease N,P excretion,by adding 0.5% of lactic acid during hair growth period in mink diets.

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