干旱区生态环境知识资源中心(Arid): Direct heat stress-induced effects on rumen fermentation characteristics and nutrients degradability in sheep pair-fed alfalfa hay

Arid

DOI	10.5424/sjar/2020183-16247
	Direct heat stress-induced effects on rumen fermentation characteristics and nutrients degradability in sheep pair-fed alfalfa hay
	Mohamed-Ali, Hassan S.; Abdoun, Khalid A.; Samara, Emad M.; Al-Badwi, Mohamed A.; Okab, Aly B.; Al-Haidary, Ahmed A.
通讯作者	Abdoun, KA (corresponding author), King Saud Univ, Coll Food & Agr Sci, Dept Anim Prod, Riyadh 11451, Saudi Arabia.
来源期刊	SPANISH JOURNAL OF AGRICULTURAL RESEARCH
ISSN	1695-971X
EISSN	2171-9292
出版年	2020
卷号	18 期号:3
英文摘要	Aim of study: To investigate the direct effect of heat stress on rumen fermentation characteristics and nutrients degradability of pair-fed rams to subsequently eliminate the confounding effects of dissimilar feed intake induced by heat stress exposure. Area of study: Saudi Arabia. Material and methods: Five rumen-cannulated desert rams (45 +/- 1.63 kg body weight; 2-3 years of age) were placed individually in controlled climatic-chambers to be exposed to two successive periods. The 1st period was a control thermoneutral period (TN; 23.64 +/- 0.14 degrees C; extended for 21 days) followed by a 2nd period of heat stress (HS; 44.26 +/- 1.70 degrees C, for another 21 days). Each period was consisted of a temperature acclimation phase (7 days) and a data collection phase (14 days). Alfalfa hay was offered twice daily during both periods in a pair-fed manner (800 g DM per head and day). Main results: Exposing pair-fed desert rams to elevated ambient temperature had (p<0.05) elevated their respiration rate and skin temperature, without noticeable (p>0.05) changes in their rectal temperature. Most of the rumen fermentation characteristics and nutrients degradability were not affected by HS (p>0.05). However, exposure to HS increased (p<0.05) pre-feeding rumen total volatile fatty acids concentrations, pre-feeding molar proportion of acetate, and post-feeding rumen osmolality. Research highlights: HS had no direct effect on post-feeding rumen fermentation characteristics and nutrients degradability in desert sheep. This implies that strategic approaches to mitigate the adverse effects of HS have to be directed towards promoting feed intake and nutrients utilization under such conditions.
英文关键词	body temperature feed intake hot climate rumen ecosystem
类型	Article
语种	英语
开放获取类型	Green Published, gold
收录类别	SCI-E
WOS记录号	WOS:000604321400018
WOS关键词	HIGH-TEMPERATURE ; ENERGY ; METABOLISM ; RESPONSES ; ANIMALS ; PROTEIN ; BALANCE ; IMPACT ; COWS
WOS类目	Agriculture, Multidisciplinary ; Soil Science
WOS研究方向	Agriculture
来源机构	King Saud University
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/349195
作者单位	[Mohamed-Ali, Hassan S.; Abdoun, Khalid A.; Samara, Emad M.; Al-Badwi, Mohamed A.; Okab, Aly B.; Al-Haidary, Ahmed A.] King Saud Univ, Coll Food & Agr Sci, Dept Anim Prod, Riyadh 11451, Saudi Arabia
推荐引用方式 GB/T 7714	Mohamed-Ali, Hassan S.,Abdoun, Khalid A.,Samara, Emad M.,et al. Direct heat stress-induced effects on rumen fermentation characteristics and nutrients degradability in sheep pair-fed alfalfa hay[J]. King Saud University,2020,18(3).
APA	Mohamed-Ali, Hassan S.,Abdoun, Khalid A.,Samara, Emad M.,Al-Badwi, Mohamed A.,Okab, Aly B.,&Al-Haidary, Ahmed A..(2020).Direct heat stress-induced effects on rumen fermentation characteristics and nutrients degradability in sheep pair-fed alfalfa hay.SPANISH JOURNAL OF AGRICULTURAL RESEARCH,18(3).
MLA	Mohamed-Ali, Hassan S.,et al."Direct heat stress-induced effects on rumen fermentation characteristics and nutrients degradability in sheep pair-fed alfalfa hay".SPANISH JOURNAL OF AGRICULTURAL RESEARCH 18.3(2020).