干旱区生态环境知识资源中心(Arid): Storage of soil carbon as particulate and mineral associated organic matter in irrigated woody perennial crops

Arid

DOI	10.1016/j.geoderma.2021.115185
	Storage of soil carbon as particulate and mineral associated organic matter in irrigated woody perennial crops
	Midwood, Andrew J.; Hannam, Kirsten D.; Gebretsadikan, Tirhas; Emde, David; Jones, Melanie D.
通讯作者	Midwood, AJ (corresponding author), Univ British Columbia, Dept Biol, Okanagan Campus, Kelowna, BC V1V 1V7, Canada. ; Midwood, AJ (corresponding author), Univ British Columbia, Okanagan Inst Biodivers Resilience & Ecosyst Serv, Okanagan Campus, Kelowna, BC V1V 1V7, Canada.
来源期刊	GEODERMA
ISSN	0016-7061
EISSN	1872-6259
出版年	2021
卷号	403
英文摘要	Agricultural practices such as annual crop production, land use change and grazing on marginal lands lead to a loss of soil carbon (C) stock. But soil C losses are not universal in agricultural systems and modest soil C gains can occur when constraints such as a lack of water are removed. To characterize this we used a meta-analysis of published data focused on semi-arid regions, where irrigation is required for crop production. We showed that soil C stocks declined under cereals, cotton, maize and non-woody horticultural crops when compared to native unirrigated adjacent grassland or shrubland. By contrast, cultivation of irrigated, woody perennial crops generally leads to an accumulation of soil C. Identifying the mechanisms by which C is retained in the soils beneath woody perennial crops, and any limits to C accumulation, was the main goal of this study. A mechanistic understanding of soil organic C content accumulation, upon land use change, can be gained by dividing soil into particulate organic matter (POM) and mineral associated organic matter (MAOM). Here, we analyzed the C and natural abundance C-13 concentrations in POM and MAOM fractions in soils from eight apple orchards and eight vineyards irrigated using a dripline, and eight apple and eight cherry orchards irrigated with micro-spray. Samples were also taken from eight native grassland areas adjacent to the agricultural sites for comparison. Several decades of woody crop production doubled the average soil C concentration in comparison to the native sites, from to 10.1 +/- 1.48 g C kg(-1) to 20.1 +/- 0.96 g C kg(-1) over a depth of 0-15 cm. Most of the C was associated with POM, which increased in concentration from 7.9 +/- 1.19 g C kg(-1) to 14.2 +/- 0.79 g C kg(-1) in 0-15 cm soils, an increase of 80%. This was crop dependent, being highest in the cherry orchards and lowest in the vineyard soils. Although holding less C, the MAOM concentration increased by 166%, changing from 2.22 +/- 0.33 to 5.91 +/- 0.62 g C kg(-1); no differences existed between crops but the MAOM C concentration appeared to be constrained to a maximum value of similar to 12 g C kg(-1). MAOM and POM had markedly different delta C-13 values: MAOM was more enriched, indicative of greater microbial processing, whereas POM had a lower delta C-13 value consistent with the dominant standing vegetation. delta C-13 values were more depleted in both fractions at the agricultural sites compared to the native sites, indicating the accumulation of greater amounts of less processed C at the agricultural sites, due to higher C inputs. We conclude the soils in this region respond to irrigated perennial woody crop production by retaining C within both POM and MAOM fractions. Accumulation of C as MAOM is constrained by the minerology of the soils in this region, but is unconstrained for POM which dominates the soil C content, and is potentially vulnerable to changes in management practices and land use.
英文关键词	13C Vineyard Orchard Soil organic matter Meta-analysis
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:000671591200003
WOS关键词	LITTER DECOMPOSITION ; AGRICULTURAL SOILS ; SEQUESTRATION ; STABILIZATION ; FRACTIONATION ; VINEYARDS
WOS类目	Soil Science
WOS研究方向	Agriculture
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/350383
作者单位	[Midwood, Andrew J.; Gebretsadikan, Tirhas; Emde, David; Jones, Melanie D.] Univ British Columbia, Dept Biol, Okanagan Campus, Kelowna, BC V1V 1V7, Canada; [Midwood, Andrew J.; Gebretsadikan, Tirhas; Emde, David; Jones, Melanie D.] Univ British Columbia, Okanagan Inst Biodivers Resilience & Ecosyst Serv, Okanagan Campus, Kelowna, BC V1V 1V7, Canada; [Hannam, Kirsten D.] Summerland Res & Dev Ctr, Agr & Agri Food Canada, Summerland, BC V0H 1Z0, Canada
推荐引用方式 GB/T 7714	Midwood, Andrew J.,Hannam, Kirsten D.,Gebretsadikan, Tirhas,et al. Storage of soil carbon as particulate and mineral associated organic matter in irrigated woody perennial crops[J],2021,403.
APA	Midwood, Andrew J.,Hannam, Kirsten D.,Gebretsadikan, Tirhas,Emde, David,&Jones, Melanie D..(2021).Storage of soil carbon as particulate and mineral associated organic matter in irrigated woody perennial crops.GEODERMA,403.
MLA	Midwood, Andrew J.,et al."Storage of soil carbon as particulate and mineral associated organic matter in irrigated woody perennial crops".GEODERMA 403(2021).