Effects of Corn Straw Fermented by Cellulase on Rumen Fermentation, Nutrient Digestion and Metabolism in Beef Cattle

ZHANG Guihua; WANG Cong; LIU Qiang; BAI Yuansheng; SHI Zhouge; LIU Xiaoni; GAO Shuwen

doi:10.3969/j.issn.1006-267x.2013.09.023

Chinese Journal of Animal Nutrition >

2013 , Vol. 25 >Issue 9: 2091 - 2100

DOI: https://doi.org/10.3969/j.issn.1006-267x.2013.09.023

Feed Science and Technology

Effects of Corn Straw Fermented by Cellulase on Rumen Fermentation, Nutrient Digestion and Metabolism in Beef Cattle

ZHANG Guihua ,
WANG Cong ,
LIU Qiang ,
BAI Yuansheng ,
SHI Zhouge ,
LIU Xiaoni ,
GAO Shuwen

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1. College of Animal Science and Veterinary Medicine, Shanxi Agricultural University, Taigu 030801, China;
2. Shanxi Province Ecology and Livestock Industry Management Station, Taiyuan 030001, China;
3. Livestock and Poultry Breeding Workstation of Xinzhou City in Shanxi Province, Xinzhou 034000, China

Received date: 2013-03-22

Online published: 2013-08-18

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Abstract

The objective of this study was to evaluate the effects of feeding corn straw fermented by cellulase on rumen fermentation, nutrient digestion and metabolism, the emissions of nitrogen, phosphorus and methane, and serum biochemical parameters in beef cattle. Thirty-six Simmenta beef cattle (about 12 months of age) in good body condition and with similar body weight were randomly divided into 4 groups with 9 beef cattle in each. The control group was fed a basal diet (mixed concentrate and corn straw; concentrate:roughage was 45:55). Experimental Ⅰ, Ⅱ and Ⅲ groups were fed diets with 0.5%, 1.0% and 1.5% corn straw fermented by cellulose to replace the corn straw of the basal diet, respectively. The experiment lasted for 80 days. The results showed that the concentrations of total volatile fatty acid, propionic acid, butyric acid and ammonia-N in rumen of beef cattle in experimental Ⅱ and Ⅲ groups were significantly higher than those in experimental Ⅰ and control groups (P﹤0.05), however, the ratio of acetate to propionate and the concentration of lactate were significantly lower than those in experimental Ⅰ and control groups (P<0.05). The digestibility of dry matter, organic matter, crude protein, ether extract, nitrogen free extract, neutral detergent fibre and acid detergent fibre of beef cattle in experimental Ⅱ and Ⅲ groups was also significantly higher than that in control group (P<0.05). Besides, the digestible energy, metabolizable energy, retention energy and the ratio of retention energy to digestible energy of beef cattle in experimental Ⅱ group were significantly increased compared with control group (P<0.05). The intake nitrogen, digestible nitrogen and retention nitrogen of beef cattle in experimental Ⅱ and Ⅲ groups were significantly higher than those in control and experimental Ⅰ groups (P<0.05). Furthermore, the ratio of nitrogen excretion to intake nitrogen, the ratio of phosphorus excretion to intake phosphorus and methane mission of beef cattle in experimental Ⅱ and Ⅲ groups were significantly lower than those in experimental Ⅰ and control groups (P<0.05). In addition, the concentrations of triglyceride, glucose, albumin and glutamic-oxal(o)acetic transaminase activity of beef cattle in experimental Ⅱ and Ⅲ groups were significantly higher than those in control and experimental Ⅰ groups (P<0.05). The results indicate that rumen fermentation, the digestibility of nutrients and the utilization of energy and nitrogen are improved, while the emissions of nitrogen, phosphorus and methane are reduced when beef cattle fed corn straw fermented by 1.0% cellulase.

Key words： cellulase; corn straw; rumen fermentation; nitrogen balance; Simmental cattle

Cite this article

ZHANG Guihua , WANG Cong , LIU Qiang , BAI Yuansheng , SHI Zhouge , LIU Xiaoni , GAO Shuwen . Effects of Corn Straw Fermented by Cellulase on Rumen Fermentation, Nutrient Digestion and Metabolism in Beef Cattle[J]. Chinese Journal of Animal Nutrition, 2013 , 25(9) : 2091 -2100 . DOI: 10.3969/j.issn.1006-267x.2013.09.023

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