干旱区生态环境知识资源中心(Arid): Effect of Increasing Species Diversity and Grazing Management on Pasture Productivity, Animal Performance, and Soil Carbon Sequestration of Re-Established Pasture in Canadian Prairie

Arid

DOI	10.3390/ani9040127
	Effect of Increasing Species Diversity and Grazing Management on Pasture Productivity, Animal Performance, and Soil Carbon Sequestration of Re-Established Pasture in Canadian Prairie
	Alemu, Aklilu W.1; Kroebel, Roland 1; McConkey, Brian G.2; Iwaasa, Alan D.2
通讯作者	Iwaasa, Alan D.
来源期刊	ANIMALS
ISSN	2076-2615
出版年	2019
卷号	9 期号:4
英文摘要	Simple Summary Canadian grasslands are recognized for providing high quality forage for grazing livestock and wildlife. The study was conducted on a re-established pasture in a Western Canadian semi-arid climate to investigate the effect of pasture species mixture and grazing management on pasture productivity, animal performance, and soil carbon sequestration. Pasture productivity and animal response were independent of pasture mixture but affected by grazing management. Average pasture dry matter productivity was greater with deferred-rotational grazing while pasture quality and animal gain were higher with continuous grazing. Soil carbon change varied with pasture seed mixture and grazing management interaction where pasture with 7-species mixture under continuous grazing had the lowest soil carbon gain. Abstract The objective of the study was to determine the effect of type of pasture mix and grazing management on pasture productivity, animal response and soil organic carbon (SOC) level. Pasture was established in 2001 on 16 paddocks of 2.1 ha that had been primarily in wheat and summer fallow. Treatments consisted of a completely randomized experimental design with two replicates: two pasture mixes (7-species (7-mix) and 12-species (12-mix)) and two grazing systems (continuous grazing (CG) and deferred-rotational grazing (DRG)). Pasture was stocked with commercial yearling Angus steers (Bos Taurus, 354 +/- 13 kg) between 2005 and 2014. All pastures were grazed to an average utilization rate of 50% (40% to 60%). Average peak and pre-grazing pasture dry matter (DM) yield and animal response were independent of pasture seed mixture but varied with grazing management and production year. Average peak DM yield was 26.4% higher (p = 0.0003) for pasture under DRG relative to CG (1301 kg ha(-1)). However, total digestible nutrient for pasture under DRG was 4% lower (p < 0.0001) as compared to CG (60.2%). Average daily weight gain was 18% higher (p = 0.017) for CG than DRG (0.81 kg d(-1)), likely related to higher pasture quality under CG. Soil carbon sequestration was affected by seed mixture x grazing system interaction (p 0.004). Over the fourteen years of production, pasture with 7-mix under CG had the lowest (p < 0.01) average SOC stock at 15 cm (24.5 Mg ha(-1)) and 30 cm depth (42.3 Mg ha(-1)). Overall, the results from our study implied that increasing species diversity for pasture managed under CG may increase SOC gain while improving animal productivity.
英文关键词	Canada grazing management pasture mixture re-established pasture soil carbon
类型	Article
语种	英语
国家	Canada
开放获取类型	gold, Green Submitted, Green Published
收录类别	SCI-E
WOS记录号	WOS:000467298500009
WOS关键词	ORGANIC-CARBON ; ECONOMIC RESPONSES ; LAND MANAGEMENT ; PLANT DIVERSITY ; NUTRITIVE-VALUE ; CROP-ROTATION ; GREAT-PLAINS ; COOL-SEASON ; FORAGE ; GRASSLANDS
WOS类目	Agriculture, Dairy & Animal Science ; Veterinary Sciences
WOS研究方向	Agriculture ; Veterinary Sciences
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/214176
作者单位	1.Agr & Agri Food Canada, Lethbridge Res & Dev Ctr, Lethbridge, AB T1J 4B1, Canada; 2.Agr & Agri Food Canada, Swift Current Res & Dev Ctr, Swift Current, SK S9H 3X2, Canada
推荐引用方式 GB/T 7714	Alemu, Aklilu W.,Kroebel, Roland,McConkey, Brian G.,et al. Effect of Increasing Species Diversity and Grazing Management on Pasture Productivity, Animal Performance, and Soil Carbon Sequestration of Re-Established Pasture in Canadian Prairie[J],2019,9(4).
APA	Alemu, Aklilu W.,Kroebel, Roland,McConkey, Brian G.,&Iwaasa, Alan D..(2019).Effect of Increasing Species Diversity and Grazing Management on Pasture Productivity, Animal Performance, and Soil Carbon Sequestration of Re-Established Pasture in Canadian Prairie.ANIMALS,9(4).
MLA	Alemu, Aklilu W.,et al."Effect of Increasing Species Diversity and Grazing Management on Pasture Productivity, Animal Performance, and Soil Carbon Sequestration of Re-Established Pasture in Canadian Prairie".ANIMALS 9.4(2019).