干旱区生态环境知识资源中心(Arid): Effects of mild water restriction on nutrient digestion and protein metabolism in desert-adapted goats

Arid

DOI	10.1016/j.smallrumres.2021.106500
	Effects of mild water restriction on nutrient digestion and protein metabolism in desert-adapted goats
	Dickhoefer, U.; Ramadhan, M. R.; Apenburg, S.; Buerkert, A.; Schlecht, E.
通讯作者	Schlecht, E (corresponding author), Univ Kassel, Anim Husb Trop & Subtrop, Steinstr 19, Witzenhausen, Germany. ; Schlecht, E (corresponding author), Georg August Univ Gottingen, Steinstr 19, Witzenhausen, Germany.
来源期刊	SMALL RUMINANT RESEARCH
ISSN	0921-4488
EISSN	1879-0941
出版年	2021
卷号	204
英文摘要	The aim of the present study was to determine the effects of mild drinking water restriction (WR) on feed intake, diet digestibility, rumen fermentation, and nitrogen (N) balance in a desert-adapted goat breed of Oman. Two feeding trials were conducted during the dry summer months (August-October) in 2013 and 2014. In each trial, nine adult male Batinah goats were exposed to two levels of mild WR (WR: 85 % (WR15) and 70 % (WR30) of individual ad libitum consumption; 100 % (WR0)) in a 3 x 3 Latin Square design. Drinking water intake, feed offered and refused, and excretion of urine and faeces were quantified and samples analysed for crude nutrient and fibre fractions. Moreover, rumen microbial protein synthesis was estimated from urinary purine derivatives excretion. In trial 2, rumen fermentation characteristics were additionally studied in three rumen-fistulated goats. Linear and quadratic effects of WR in each trial were assessed by mixed model analysis, whereas correlations between drinking water intake and response variables were determined across both trials. For WR30, drinking water intake was 79 % and 90 %, respectively, of the water intake of WR0 goats in trial 1 and WR15 goats in trial 2. Water restriction had no effect on feed intake, rumen microbial protein synthesis, and N balance in both trials. However, apparent total tract digestibilities of neutral and acid detergent fibre tended to decrease linearly (p <= 0.081) with increasing WR level in trial 1, whereas those of dry matter and organic matter were lower (p <= 0.028) for WR15 than for WR0 and WR30 in trial 2. Proportions of butyrate (p <= 0.046) and isovalerate (p = 0.087) in rumen fluid were greater and those of propionate (p = 0.079) and valerate (p = 0.062) lower for WR30 as compared to one or both of the other WR levels. Duodenal microbial N flow and efficiency of microbial protein synthesis did not differ between WR levels. Yet, across both trials, both variables correlated positively with drinking water intake. Similarly, declining drinking water intake increased the ratio between faecal and urine N excretion (r=-0.55) and the N concentration in faeces (r=-0.42), but reduced the fibre concentration (r=0.38) and the proportion of undigested feed N in faeces (r=0.49). Mild restriction of drinking water intake to >= 79 % of the ad libitum consumption, which is expected to occur more frequently with advancing climate change in the semi-arid tropics and subtropics, may impair feed nutrient use and thus performance of regionally adapted small ruminants, while improving the quality of their manure.
英文关键词	Digestibility Faecal nitrogen fractions Microbial protein synthesis Nitrogen balance Rumen fermentation Small ruminants
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000701957500014
WOS关键词	FEED-INTAKE ; NITROGEN-BALANCE ; BLACK BEDOUIN ; RUMEN ; DEHYDRATION ; FERMENTATION ; DEPRIVATION ; PERFORMANCE ; RESPONSES ; QUALITY
WOS类目	Agriculture, Dairy & Animal Science
WOS研究方向	Agriculture
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/364692
作者单位	[Dickhoefer, U.] Univ Hohenheim, Anim Nutr & Rangeland Management Trop & Subtrop, Fruwirthstr 31, D-70599 Stuttgart, Germany; [Ramadhan, M. R.; Apenburg, S.; Schlecht, E.] Univ Kassel, Anim Husb Trop & Subtrop, Steinstr 19, Witzenhausen, Germany; [Ramadhan, M. R.; Apenburg, S.; Schlecht, E.] Georg August Univ Gottingen, Steinstr 19, Witzenhausen, Germany; [Buerkert, A.] Univ Kassel, Organ Plant Prod & Agroecosyst Res Trop & Subtrop, Steinstr 19, Witzenhausen, Germany; [Apenburg, S.] Landesamt Umwelt, Tiergarten 30, D-90480 Nurnberg, Germany; [Dickhoefer, U.] Christian Albrechts Univ Kiel, Inst Anim Nutr & Physiol, Hermann Rodewald Str 9, D-24118 Kiel, Germany
推荐引用方式 GB/T 7714	Dickhoefer, U.,Ramadhan, M. R.,Apenburg, S.,et al. Effects of mild water restriction on nutrient digestion and protein metabolism in desert-adapted goats[J],2021,204.
APA	Dickhoefer, U.,Ramadhan, M. R.,Apenburg, S.,Buerkert, A.,&Schlecht, E..(2021).Effects of mild water restriction on nutrient digestion and protein metabolism in desert-adapted goats.SMALL RUMINANT RESEARCH,204.
MLA	Dickhoefer, U.,et al."Effects of mild water restriction on nutrient digestion and protein metabolism in desert-adapted goats".SMALL RUMINANT RESEARCH 204(2021).