干旱区生态环境知识资源中心(Arid): Use of the N-alkanes to Estimate Intake, Apparent Digestibility and Diet Composition in Sheep Grazing on Stipa brevilfora Desert Steppe

Arid

	Use of the N-alkanes to Estimate Intake, Apparent Digestibility and Diet Composition in Sheep Grazing on Stipa brevilfora Desert Steppe
	Hu Honglian; Liu Yongzhi; Li Yakui; Lu Dexun; Gao Min
来源期刊	Journal of Integrative Agriculture
ISSN	2095-3119
出版年	2014
卷号	13 期号:5 页码:1065-1072
英文摘要	The application of n-alkane as markers to estimate herbage intake, apparent digestibility and species composition of diet consumed by grazing sheep was studied. Six local Mongolian sheep were used to determine dry matter (DM) intake, apparent DM digestibility and species composition of diet during summer, autumn and winter. Animals were orally dosed twice daily with n-alkane gelatin capsules containing 60 mg C_(32)-alkane as an external marker. Diet composition was estimated by comparing the odd-chain n-alkanes pattern profile (C_(27)-C_(31)) of the consumed plant species with the n-alkanes fecal concentrations of grazing animals, using a non-negative least squares algorithm called EATWHAT software package. The alkane pair C_(32):C_(33) and C_(33) alkane were used to estimate DM intake and diet apparent DM digestibility, respectively. The results showed that daily dry matter intake of the sheep were 1.77, 1.61 and 1.18 kg d~(-1) in summer, autumn and winter, respectively. Apparent DM digestibility, crude protein (CP), metabolizable energy (ME) and neutral detergent ifber (NDF) intake of diet consumed by sheep decreased signiifcantly (P<0.01) from summer to winter, with no evident changes in ADF and ADL intake. Diet composition indicated Artemisia frigida Willd was the most dominant diet component, contributed 79.68, 68.12 and 86.26% of sheeps diets in summer, autumn and winter, respectively. Cleistogenes songorica Ohwi and Convolvulus ammannii Desr were the important components of the diet. Although Stipa brevilfora Griseb is one of the main plant species in the study area, the sheep rarely choosed it. The study indicated that CP and ME in diet consumed by sheep were deifcient in winter. Therefore, appropriate supplementation strategies should be indispensable during this period.
英文关键词	n-alkanes diet composition intake apparent digestibility sheep
类型	Article
语种	英语
开放获取类型	Other Gold, Bronze
收录类别	CSCD
WOS研究方向	Agriculture
CSCD记录号	CSCD:5153617
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/335360
作者单位	Hu Honglian, Institute of Animal Nutrition and Feed, Inner Mongolia Academy of Agricultural&Animal Husbandry Sciences, Hohhot, Inner Mongolia 010031, China.; Lu Dexun, Institute of Animal Nutrition and Feed, Inner Mongolia Academy of Agricultural&Animal Husbandry Sciences, Hohhot, Inner Mongolia 010031, China.; Gao Min, Institute of Animal Nutrition and Feed, Inner Mongolia Academy of Agricultural&Animal Husbandry Sciences, Hohhot, Inner Mongolia 010031, China.; Liu Yongzhi, Inner Mongolia Prataculture Research Center, Chinese Academy of Sciences, Huhhot, Inner Mongolia 010031, China.; Li Yakui, College of Animal and Technology, Hebei North University, Zhangjiakou, Hebei 075000, China.
推荐引用方式 GB/T 7714	Hu Honglian,Liu Yongzhi,Li Yakui,et al. Use of the N-alkanes to Estimate Intake, Apparent Digestibility and Diet Composition in Sheep Grazing on Stipa brevilfora Desert Steppe[J],2014,13(5):1065-1072.
APA	Hu Honglian,Liu Yongzhi,Li Yakui,Lu Dexun,&Gao Min.(2014).Use of the N-alkanes to Estimate Intake, Apparent Digestibility and Diet Composition in Sheep Grazing on Stipa brevilfora Desert Steppe.Journal of Integrative Agriculture,13(5),1065-1072.
MLA	Hu Honglian,et al."Use of the N-alkanes to Estimate Intake, Apparent Digestibility and Diet Composition in Sheep Grazing on Stipa brevilfora Desert Steppe".Journal of Integrative Agriculture 13.5(2014):1065-1072.