干旱区生态环境知识资源中心(Arid): Addressing the soil carbon dilemma: Legumes in intensified rotations regenerate soil carbon while maintaining yields in semi-arid dryland wheat farms

Arid

DOI	10.1016/j.agee.2022.107906
	Addressing the soil carbon dilemma: Legumes in intensified rotations regenerate soil carbon while maintaining yields in semi-arid dryland wheat farms
	van der Pol, Laura K.; Robertson, Andy; Schipanski, Meagan J.; Calderon, Francisco D.; Wallenstein, Matthew; Cotrufo, M. Francesca
通讯作者	van der Pol, LK
来源期刊	AGRICULTURE ECOSYSTEMS & ENVIRONMENT
ISSN	0167-8809
EISSN	1873-2305
出版年	2022
卷号	330
英文摘要	Semi-arid regions support the majority of global wheat production, but they are threatened by continued soil erosion and increased risk of drought and extreme temperatures from climate change. Enhancing soil organic matter (SOM) is a key adaptation strategy for sustaining agriculture in these regions because it can improve water retention and nutrient cycling. When seeking to increase SOM, growers face a dilemma, known as the 'soil carbon (C) dilemma' (Janzen, 2006): How can SOM be increased, while also increasing the release of nutrients that accompanies decomposition? Our observational study examined whether growers could address this dilemma through intensification with diverse grain crops. We specifically tested whether incorporating legumes into a continuous rotation influences the form and amount of SOM as well as productivity in farms of the central Great Plains region of the U.S. by contrasting three, no-till rotation systems: 1) conventional wheat-fallow; 2) continuous grain-only rotations, and 3) continuous grain rotations that incorporate a legume crop. We sampled on-farm fields and experimental agricultural research station plots that had received one of these rotations for at least eight years. We compared yield, soil organic C (SOC), and nitrogen (N) stocks in bulk soil to 1 m, as well as SOC and N in particulate organic matter (POM) and mineral-associated organic matter (MAOM) in surface soils (0-10 cm) among the different rotations. We also estimated the long-term effects of the rotations on SOC fractions through a simulation of each rotation with the MEMS 1.0 model, verified with measured data.We found that intensifying the rotation with continuous grains led to 1.5-fold increase in aggregate size but did not change SOC stocks. Incorporating a legume to the continuous grain rotation resulted in 1 Mg C ha(-1) more SOC on average in surface soil compared to wheat-fallow rotations. No significant soil changes among rotations were observed at depth. Longer-term simulations of these cropping systems suggest that including legumes could allow for 10% greater SOC gains over time compared to wheat-fallow. Since legume incorporation also increased crop yields across the full rotation cycle, our results support our hypothesis that growers can solve the 'soil C dilemma' by simultaneously increasing the quantity and N-content of soil input through continuous cropping with both grains and legumes.
英文关键词	Soil organic matter No-till rotation Management practices Soil carbon modeling SOM fractionation
类型	Article
语种	英语
开放获取类型	hybrid
收录类别	SCI-E
WOS记录号	WOS:000790163200003
WOS关键词	ORGANIC-MATTER FORMATION ; LAND-USE CHANGE ; CROPPING SYSTEMS ; GRAIN LEGUMES ; C SEQUESTRATION ; CLIMATE-CHANGE ; NO-TILLAGE ; NITROGEN ; STOCKS ; INPUTS
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/2XILL650/391662
推荐引用方式 GB/T 7714	van der Pol, Laura K.,Robertson, Andy,Schipanski, Meagan J.,et al. Addressing the soil carbon dilemma: Legumes in intensified rotations regenerate soil carbon while maintaining yields in semi-arid dryland wheat farms[J],2022,330.
APA	van der Pol, Laura K.,Robertson, Andy,Schipanski, Meagan J.,Calderon, Francisco D.,Wallenstein, Matthew,&Cotrufo, M. Francesca.(2022).Addressing the soil carbon dilemma: Legumes in intensified rotations regenerate soil carbon while maintaining yields in semi-arid dryland wheat farms.AGRICULTURE ECOSYSTEMS & ENVIRONMENT,330.
MLA	van der Pol, Laura K.,et al."Addressing the soil carbon dilemma: Legumes in intensified rotations regenerate soil carbon while maintaining yields in semi-arid dryland wheat farms".AGRICULTURE ECOSYSTEMS & ENVIRONMENT 330(2022).