| The Acanthopanax senticosus Harms (ASH)has the pure natural superiority, it also has theefficiency of promote the livestock growth,restrain the pathogenic bacterium and enhance theimmunity. The aim of this study was to determine the effect of ASH on intestinal tract maturationin suckling piglets. Method: In this study we chose landrace×large Yorkshire crossingbreed (L×L)piglets 18 broods,7 days of age, divide them into 6 groups randomly, and each groups has 3repetitions, 8-10 piglets in each repetition. Five diets contain chlorotetracycline (CTC) 200mg/kg,ASH alcohol extractives 50mg/kg,200mg/kg,water extractives 200mg/kg and 1% ASH coarsepowder respectively except control group. Piglets were placed with female pig in preliminarylabor bed. The feeding experiment is to last for 2 weeks; diets and water were available ad libitum.At the 14 and 21days of age, select 3 piglets from each repetition randomly to abatage. Selectjejunum,duodenum,ileum and make paraffin section to measure the length of villus and depth ofcrypts, and observe the villis morphology change onsmall intestine by electron microscope result,detect the disaccharidase content in villous coat of small intestine and the IGF-â… content in blood.The result of effect of ASH on the ratio of diarrhea in piglets showed:At the 21th day,the ratio of diarrhea of 50mg/kg alcohol extractives is 0, and the 200mg/kgalcohol extractives, 200mg/kg water extractives,acronize group,1% ASH coarse powder andcontrol group is 1.0%,0.49%,2.13%,0.57% and 2.25%. and the death rate of 50mg/kg alcoholextractives,200mg/kg water extractives is 0, 1% ASH coarse powder,200mg/kg alcoholextractives,acronize group and control group is 0.37%,0.49%,1.56% and 1.82% by turns.The result of effect of ASH and the extractive on internal organ and intestinal tractdevelopment in piglets:At the 14th day, there was significant (P＜0.05) difference surveyed on liver and intestinaltract relative weight among 200mg/kg alcohol extractives and water extractives group, at the 21thday, that was significantly (P＜0.05)decreased in group 50mg/kg alcohol extractives than othersgroup on liver and spleen relative weight.In the aspect of villus length, at the 14th day, the intestinal tract development of 200mg/kgalcohol extractives and 200mg/kg water extractives is better than control group (P＜0.05),at the21th day, the 50mg/kg alcohol extractives group was more long (P＜0.01) than other groups, 1%coarse powder group surpass than control group and CTC group (P＜0.05); In the aspect of cryptsdepth, at the 21th day, the 50mg/kg alcohol extractives group was the deepest (P＜0.01), and thedifference was non-significant between control group and the CTC group (P＞0.05);In the aspect of the ratio between villus length and crypt depth, at the 14th day, there was significant (P＜0.05)difference between1% coarse powder group and CTC group, at the 21th day,the 50mg/kg alcoholextractives group displayed superiority markedly (P＜0.01). The diameter of the villus and thequantity of unit area also indicate that the ASH and the extractives could promote the villusdevelopment, increased the absorption surface. And the result of hormone level also showed thatin the experiment groups, the IGF-â… level of ASH and the extractive is significant high thancontrol group (P＜0.05), and it could excite the brush border development on villous coat of smallintestine, it is profit for villous coat of small intestine development.The result of effect of ASH and the extractive on disaccharidase change on villous coat ofsmall intestine in piglets showed that: at 14th, the 200mg/kg water extractives could excite thedisaccharidase secretion (P＜0.05),at the 21th day, the 50mg/kg alcohol extractives group alsoshowed the obviously preponderance (P＜0.05).To sum up, The ASH and the extractives could stimulate the small intestine developmentmarkedly under the determinate additive dose. And it has the marked superiority than CTC, itsuggest that it will be a potential green feed addictive to developed. |
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