Effect of calcium salt of long-chain fatty acids and alfalfa supplementation on performance of Holstein bulls
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Yang He1, Wenjing Niu1, Qinghua Qiu1, Chuanqi Xia1, Taoqi Shao1, Haibo Wang1, Qianwen Li1, Zhantao Yu1, Zhibiao Gao1, Muhammad Aziz Ur Rahman2, Huawei Su1 and Binghai Cao1
1State Key Laboratory of Animal Nutrition, College of Animal Science and Technology, China Agricultural University, Beijing, China
2Gomal College of Veterinary Sciences, Gomal University, D.I. Khan, KPK, Pakistan
Binghai Cao, email: firstname.lastname@example.org
Huawei Su, email: email@example.com
Keywords: calcium salt of long-chain fatty acids; alfalfa; rumen microbial flora; serum biochemical indexes; Holstein bulls
Received: August 24, 2017 Accepted: November 14, 2017 Published: December 09, 2017
The purpose of this study was to assess the effects of calcium salt of long-chain fatty acids (CSFA) and alfalfa on beef cattle in the late fattening. 48 Holstein bulls were selected and randomly divided into 4 groups, feeding four dietary that Leymus chinensis with (LC) or with no (LN) 2.4% CSFA, and alfalfa replaced 50% Leymus chinensis with (AC) or with no (AN) 2.4% CSFA. The results indicated that alfalfa improved the feed conversion rate (P < 0.05). CSFA increased serum low density lipoprotein cholesterol, and reduced the cooking loss of Longissimus muscle (P < 0.05). CSFA and alfalfa reduced Acetate/Propionate. Alfalfa and CASF had significant additive effects on the apparent digestibility of dry matter, crude protein, neutral detergent fiber, acid detergent fiber, organic matter and rumen fermentation for acetate, isobutyrate, butyrate, isovalerate, total volatile fatty acids (P < 0.05). CSFA increased microbial diversity index when compared with alfalfa (P < 0.05), but no significant differences were detected in bacterial genera abundances among diets. The relative abundances of rumen bacterial genera have significant correlation with apparent digestibility of nutrients, rumen fermentation characteristics and serum biochemical parameters (P < 0.05). These results comprehensively evaluated the additive effects of alfalfa and CSFA on the application in Holstein bulls.
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