Feed Science and Technology

Soybean Isoflavone: Effects on Performance, Blood Physiological and Biochemical Indices and Fecal Microorganism Flora of Lactating Sows

  • LI Fangfang ,
  • ZHU Taotao ,
  • ZHANG Yong ,
  • ZHU Yujing
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  • College of Veterinary and Animal Science, Shenyang Agricultural University, Shenyang 110866, China

Received date: 2015-03-23

  Online published: 2015-09-12

Abstract

This trial was conducted to investigate the effects of dietary soybean isoflavone (SI) levels on performance, blood physiological and biochemical indices and fecal microorganism flora of lactating sows. A total of 48 large white pigs with body weight of (151.05±4.53) kg (which had good condition, similar back fat and birthday age) were randomly arranged into 4 groups with 12 replicates per group and 1 lactating sow per replicate.The control group was fed a basal diet, and three trial groups were fed the basal diet supplemented with 5, 10 and 15 mg/kg SI, respectively. The experiment lasted for 21 days. The results showed as follows: 1) the average daily feed intake of trial groups was significantly higher than that of the control group of lactating sows (P<0.01); the 21 days milk yield of 10 mg/kg SI group was significantly higher than that of the control group (P<0.05), and the feed/lactating of 10 mg/kg SI group was significantly lower than that of the control group (P<0.05). 2) The content of growth hormone, triiodothyronine, estrogen, prolactin and total protein in blood of 10 mg/kg SI group were significantly higher than those of the control group of lactating sows (P<0.05), while the contents of tetraiodothyronine, glycerin trilaurate and usea nitrogen in blood of 10 mg/kg SI group were significantly lower than those of the control group (P<0.05). 3) The butterfat ratio of 5 and 10 mg/kg SI groups was significantly higher than that of the control group (P<0.05), the lactose ratio of 15 mg/kg SI group was significantly higher than that of the control group (P<0.05), the lactoprotein content of 10 mg/kg SI group was significantly higher than that of the control group (P<0.05). 4) The fecal Escherichia coli number of trial groups was significantly lower than that of the control group (P<0.01), and the fecal Lactobacillus number of trial groups was significantly higher than that of the control group (P<0.01). In conclusion, dietary supplementation of SI at proper level can improve performance, blood physiological and biochemical indices, maintain intestinal microorganism flora balance of lactating sows. The suitable supplemental level of SI for lactating sows is 10 mg/kg.

Cite this article

LI Fangfang , ZHU Taotao , ZHANG Yong , ZHU Yujing . Soybean Isoflavone: Effects on Performance, Blood Physiological and Biochemical Indices and Fecal Microorganism Flora of Lactating Sows[J]. Chinese Journal of Animal Nutrition, 2015 , 27(9) : 2803 -2810 . DOI: 10.3969/j.issn.1006-267x.2015.09.018

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