Ruminant Nutrition

Effects of Dietary Neutral Detergent Fiber to Non-Fiber Carbohydrates Ratio on Ruminal Nitrate Reduction of Hu Sheep

  • LIN Miao ,
  • ZHANG Jiangang ,
  • CHEN Zhiyuan ,
  • ZHAO Guoqi
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  • College of Animal Sciences and Technology, Yangzhou University, Yangzhou 225009, China

Received date: 2014-09-17

  Online published: 2014-12-05

Abstract

A 4 × 4 Latin square design in this study was used to investigate the effects of different dietary neutral detergent fiber to non-fiber carbohydrates ratios (NDF/NFC) (0.58, 0.71, 1.20 and 1.57) on dynamic changes of ruminal nitrate nitrogen content and fermentation characteristics of Hu sheep. The diet of each group contained 1.0% potassium nitrate, and rumen fluid was obtained at 0, 0.5, 1.0, 1.5, 2.0, 4.0, 6.0 and 8.0 h after feeding to determine the contents of nitrate and nitrite and ruminal fermentation parameters. Blood sample was collected at 2.0 h after feeding to determine the blood methemoglobin content. The results showed that the nitrite content of sheep fed diet with NDF/NFC=0.71 was lowest at 6.0 to 8.0 h after feeding. With the rising of NDF/NFC, NH3-N content had a trend of decrease at 0 to 1.5 h after feeding. Total microbial protein content of sheep fed diet with NDF/NFC=0.58 was highest at 0 and 8.0 h after feeding, and had no significant difference with sheep fed diet with NDF/NFC=0.71 (P>0.05). In addition, the nitrite toxicity was not detected during experiment period. In conclusion, the optimum NDF/NFC in the diet of Hu sheep is 0.71 for nitrate nitrogen reduction and fermentation in the rumen under this experimental condition.

Cite this article

LIN Miao , ZHANG Jiangang , CHEN Zhiyuan , ZHAO Guoqi . Effects of Dietary Neutral Detergent Fiber to Non-Fiber Carbohydrates Ratio on Ruminal Nitrate Reduction of Hu Sheep[J]. Chinese Journal of Animal Nutrition, 2014 , 26(12) : 3659 -3665 . DOI: 10.3969/j.issn.1006-267x.2014.12.015

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