气候变化领域集成服务门户(CCPortal): Influences of grassland degradation on forage availability by sheep in the Inner Mongolian steppes of China

CCPortal

DOI	10.1111/j.1740-0929.2011.00878.x
	Influences of grassland degradation on forage availability by sheep in the Inner Mongolian steppes of China
	Wang, Chengjie; Wang, Shiping; Zhou, He; Li, Zhiqiang; Han, Guodong
通讯作者	Wang, SP (通讯作者)
发表日期	2011
ISSN	1344-3941
起始页码	537
结束页码	542
卷号	82 期号:4
英文摘要	In China and throughout the world, evaluation of the nutrient values of forages has always lagged behind research regarding the nutrient requirements of animals. In this study, the effective degradability and availability of forages were evaluated on undegraded and degraded grassland using a technique where nylon bags were incubated in sheep rumen. We found that the concentrations of organic matter (OM), neutral detergent fiber (NDF), non-fiber carbohydrates (NFC) and carbohydrates (CHO) of forage were higher (P < 0.05) and the crude protein (CP) concentration was lower (P < 0.05) in the degraded grassland than in the undegraded grassland. The effective degradability (ED) of NFC (ED(NFC)) was higher (P < 0.05) and ED(CHO) and ED(NDF) were lower in the undegraded grassland than in the degraded grassland. The ED(OM) and ED(CP) were not affected by the type of grassland, which may explain why ED is an inadequate parameter for the evaluation of forage availability. According to an analysis of the ratio of effectively degraded N to OM and NFC, plants of the undegraded grassland can provide more digestive nutrients to meet the requirements of grazing animals compared to plants of the degraded grassland. Results suggested that it is inadequate to consider only chemical composition and effective degradability when evaluating forage availability with grassland degradation. The ratio of effectively degraded N to OM and NFC was an appropriate indicator.
关键词	GROWING-SEASON DAIRY-COWS RYEGRASS RUMEN DEGRADABILITY CATTLE
英文关键词	forage availability; Inner Mongolian steppes; rumen degradation; sheep
语种	英语
WOS研究方向	Agriculture
WOS类目	Agriculture, Dairy & Animal Science
WOS记录号	WOS:000293193500007
来源期刊	ANIMAL SCIENCE JOURNAL
来源机构	中国科学院青藏高原研究所
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/257906
推荐引用方式 GB/T 7714	Wang, Chengjie,Wang, Shiping,Zhou, He,et al. Influences of grassland degradation on forage availability by sheep in the Inner Mongolian steppes of China[J]. 中国科学院青藏高原研究所,2011,82(4).
APA	Wang, Chengjie,Wang, Shiping,Zhou, He,Li, Zhiqiang,&Han, Guodong.(2011).Influences of grassland degradation on forage availability by sheep in the Inner Mongolian steppes of China.ANIMAL SCIENCE JOURNAL,82(4).
MLA	Wang, Chengjie,et al."Influences of grassland degradation on forage availability by sheep in the Inner Mongolian steppes of China".ANIMAL SCIENCE JOURNAL 82.4(2011).