干旱区生态环境知识资源中心(Arid): Soil health indicator responses to three years of cover crop and crop rotation in a northern semi-arid region, the Canadian prairies

Arid

DOI	10.1016/j.agee.2023.108755
	Soil health indicator responses to three years of cover crop and crop rotation in a northern semi-arid region, the Canadian prairies
	Wu, Qianyi; Lawley, Yvonne; Congreves, Kate A.
通讯作者	Congreves, KA
来源期刊	AGRICULTURE ECOSYSTEMS & ENVIRONMENT
ISSN	0167-8809
EISSN	1873-2305
出版年	2024
卷号	359
英文摘要	Increasing crop diversity via cover cropping is considered a powerful strategy to improve soil health; thus, a better understanding of the impacts on soil is crucial. In northern semi-arid regions, cover cropping can be agronomically challenging due to growing condition limitations, and the paucity of cover crop data only exacerbates this challenge. Still, farmers are interested in adopting cover crops to reach their soil health goals. Our study addressed this gap by 1) comparing rotations with versus without cover crops; and 2) comparing different rotational treatments of perennial alfalfa, two-year 'short' rotations, to four-year 'long' rotations with and without cover crops. After three years, soil health indicators were measured at four sites across the Canadian prairies, including wet aggregate stability (WAS), soil pH, electronic conductivity (EC), evolved soil CO2, soil active C, soil organic carbon (SOC), total carbon (C), N2O production, inorganic N, soil protein, potential mineralized N (PMN), and total N. During a dry period which limited cover crop growth, the cover crops had limited impact on soil health indicators, except for a reduction in spring soil nitrate-N levels at two of the four sites. Surprisingly, the crop phase of the rotation had more differences on soil health indicators than the inclusion of cover crops, but the inconsistency of the changes made it difficult to draw clear patterns. Most notably, soil health indicators (and especially soil CO2) responded to crop rotation treatment. The perennial treatment produced 4.57-8.74 mu g g-1 24 hr-1; whereas other rotation treatments respired 25-28%, 44-45%, 22-28%, and 35-36% less CO2. Overall, early indicators of soil health change tended to be related to dynamics of soil inorganic N cycling and CO2 evolution. Our results suggest that a longer-term period of cover cropping and greater biomass accumulation will be needed to substantially impact soil health in this semi-arid environment. Implementing more 'perennialized' crop rotations will benefit the early indicators of soil health change in a short timeframe.
英文关键词	Prairie cropping systems Diversification Perennialization Soil quality Soil carbon Soil nitrogen
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:001095804000001
WOS关键词	ORGANIC-CARBON ; NITROGEN ; CORN ; WINTER ; YIELD ; MANAGEMENT ; EMISSIONS ; REMOVAL ; QUALITY ; NITRATE
WOS类目	Agriculture, Multidisciplinary ; Ecology ; Environmental Sciences
WOS研究方向	Agriculture ; Environmental Sciences & Ecology
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/402698
推荐引用方式 GB/T 7714	Wu, Qianyi,Lawley, Yvonne,Congreves, Kate A.. Soil health indicator responses to three years of cover crop and crop rotation in a northern semi-arid region, the Canadian prairies[J],2024,359.
APA	Wu, Qianyi,Lawley, Yvonne,&Congreves, Kate A..(2024).Soil health indicator responses to three years of cover crop and crop rotation in a northern semi-arid region, the Canadian prairies.AGRICULTURE ECOSYSTEMS & ENVIRONMENT,359.
MLA	Wu, Qianyi,et al."Soil health indicator responses to three years of cover crop and crop rotation in a northern semi-arid region, the Canadian prairies".AGRICULTURE ECOSYSTEMS & ENVIRONMENT 359(2024).