气候变化领域集成服务门户(CCPortal): Effect of feed level and supplementary rumen protected lysine and methionine on growth performance, rumen fermentation, blood metabolites and nitrogen balance in growing Tan lambs fed low protein diets

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DOI	10.1016/j.anifeedsci.2021.115024
	Effect of feed level and supplementary rumen protected lysine and methionine on growth performance, rumen fermentation, blood metabolites and nitrogen balance in growing Tan lambs fed low protein diets
	Liu, Hu; Yang, Guo; Degen, Allan; Ji, Kaixi; Jiao, Dan; Liang, Yanping; Xiao, Ling; Long, Ruijun; Zhou, Jianwei
通讯作者	Zhou, JW (通讯作者)，Lanzhou Univ, Int Ctr Tibetan Plateau Ecosyst Management, State Key Lab Grassland Agroecosyst,Sch Life Sci, Engn Res Ctr Arid Agr & Ecol Remediat,Minist Educ, Lanzhou 730000, Peoples R China.
发表日期	2021
ISSN	0377-8401
EISSN	1873-2216
卷号	279
英文摘要	Effect of feed level (FL) and supplementary rumen protected lysine (Lys) and methionine (Met) (RPLM) on growth performance, rumen fermentation, blood metabolites, and nitrogen (N) balance was studied in growing lambs fed low protein diets. Thirty-six, 7-month old wether Tan lambs (initial body weight, 35.0 +/- 1.66 kg) were assigned into one of six groups (n = 6) in a randomized complete block design. The experiment was a 2 x 3 factorial arrangement of treatments. The lambs were either not supplemented (control) or supplemented (RPLM) with 4.5 g/ day rumen protected Lys plus 1.5 g/day rumen protected Met and combined with three FLs (1.0, 0.8 and 0.6 voluntary intake -VI). The basal diet, on a dry matter (DM) basis, consisted of 400 g/ kg forage and 600 g/kg concentrate. The average daily gain (ADG) increased linearly (P < 0.05) with increasing FL, and ADG was greater (interaction, P = 0.01) and the DM intake to ADG ratio was lesser (interaction, P = 0.04) in RPLM than control lambs in the 0.8 VI and 1.0 VI FLs, but not in the 0.6 VI FL. Digestibilities of DM, organic matter, crude protein, neutral detergent fiber and acid detergent fiber decreased linearly (P < 0.01) with increasing FL. Concentrations of total volatile fatty acids (VFAs) and butyrate and the acetate:propionate ratio increased linearly with increasing FL (P < 0.05). In addition, concentrations of propionate and iso-VFAs were greater (P < 0.05); whereas, of butyrate and the acetate: propionate ratio were lesser (P < 0.05) in RPLM than control lambs. Daily faecal-N output and N-retention were greater (interaction, P < 0.05) in RPLM than control lambs in the 1.0 VI and 0.8 VI FLs, but not in the 0.6 VI FL. In addition, microbial-N (MN) and the efficiency of microbial protein synthesis increased linearly (P < 0.01) with increasing FL and MN was greater (P = 0.02) in RPLM than in control lambs. Serum glucose concentration increased linearly (P < 0.01) with decreasing FL and was greater (P < 0.01) in RPLM than in control lambs. It was concluded that supplementary RPLM at 1.0 VI and 0.8 VI could improve ADG, feed conversion, and N-balance in growing Tan lambs and could be beneficial for sheep fed a low protein diet.
关键词	URINARY PURINE DERIVATIVES DRY-MATTER INTAKE APPARENT DIGESTIBILITY BODY-COMPOSITION TIBETAN SHEEP UREA KINETICS ENERGY-INTAKE N BALANCE CONCENTRATE DIGESTION
英文关键词	Feed level; Rumen protected lysine plus methionine; Tan sheep; Apparent digestibility; Rumen fermentation; Microbial protein synthesis
语种	英语
WOS研究方向	Agriculture
WOS类目	Agriculture, Dairy & Animal Science
WOS记录号	WOS:000691546700015
来源期刊	ANIMAL FEED SCIENCE AND TECHNOLOGY
来源机构	中国科学院西北生态环境资源研究院
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/255052
作者单位	[Liu, Hu; Long, Ruijun; Zhou, Jianwei] Lanzhou Univ, Int Ctr Tibetan Plateau Ecosyst Management, State Key Lab Grassland Agroecosyst,Sch Life Sci, Engn Res Ctr Arid Agr & Ecol Remediat,Minist Educ, Lanzhou 730000, Peoples R China; [Liu, Hu; Zhou, Jianwei] Lanzhou Univ, Coll Pastoral Agr Sci & Technol, Lanzhou 730000, Peoples R China; [Yang, Guo; Ji, Kaixi; Jiao, Dan; Liang, Yanping] Chinese Acad Sci, Northwest Inst Ecol Environm & Resources, Gaolan Ecol & Agr Integrated Expt Stn, Lanzhou 730000, Peoples R China; [Degen, Allan] Ben Gurion Univ Negev, Blaustein Inst Desert Res, Wyler Dept Dryland Agr, Desert Anim Adaptat & Husb, IL-8410500 Beer Sheva, Israel; [Xiao, Ling] Hangzhou King Technol Feed Co LTD, Hangzhou 311107, Peoples R China
推荐引用方式 GB/T 7714	Liu, Hu,Yang, Guo,Degen, Allan,et al. Effect of feed level and supplementary rumen protected lysine and methionine on growth performance, rumen fermentation, blood metabolites and nitrogen balance in growing Tan lambs fed low protein diets[J]. 中国科学院西北生态环境资源研究院,2021,279.
APA	Liu, Hu.,Yang, Guo.,Degen, Allan.,Ji, Kaixi.,Jiao, Dan.,...&Zhou, Jianwei.(2021).Effect of feed level and supplementary rumen protected lysine and methionine on growth performance, rumen fermentation, blood metabolites and nitrogen balance in growing Tan lambs fed low protein diets.ANIMAL FEED SCIENCE AND TECHNOLOGY,279.
MLA	Liu, Hu,et al."Effect of feed level and supplementary rumen protected lysine and methionine on growth performance, rumen fermentation, blood metabolites and nitrogen balance in growing Tan lambs fed low protein diets".ANIMAL FEED SCIENCE AND TECHNOLOGY 279(2021).