气候变化领域集成服务门户(CCPortal): Root-derived carbon stocks in formerly deep-ploughed soils

CCPortal

DOI	10.1016/j.orggeochem.2024.104756
	Root-derived carbon stocks in formerly deep-ploughed soils - A biomarker-based approach
	Burger, D. J.; Bauke, S. L.; Schneider, F.; Kappenberg, A.; Gocke, M. I.
发表日期	2024
ISSN	0146-6380
EISSN	1873-5290
起始页码	190
卷号	190
英文摘要	Roots can add significant amounts of carbon (C) to the subsoil, which improves soil physical properties and can mitigate climate change. About 5% of croplands in Germany have been deep-ploughed (30-120 cm) at least once. This can provide better root access to the subsoil and may increase yields, but little is known on the fate of root-derived C in the subsoil (at depth greater than 30 cm) after deep-ploughing. We hypothesized that five decades after deep-ploughing, root-derived C stocks were higher than conventionally ploughed treatments due to better root development. We analysed suberin and cutin monomers as tracers for root- and shoot-derived C at three former deep-ploughed sites in Northern Germany with different soil textures and deep-ploughing depths. Concentrations of suberin monomers in the soil positively correlated with root biomass; this was most pronounced at one sandy site, but had higher variability at the other two sites due to crops with different root systems in the crop rotation, lower root development, and more favourable conditions for C decomposition. Suberin contributed more to the bulk soil organic carbon (SOC) stocks than cutin throughout the soil profile at all sites. The contribution of suberin monomers to the bulk SOC stock at silty site Banteln and the sandy site Essemuhle was 38% higher in the deep-ploughed plots than at the reference plot, respectively, these differences were most visible in the subsoil of Essemuhle. We conclude that as C stocks and root development increase, suberin SOC stocks also increase, especially in sandy subsoils with low pH.
英文关键词	Root-derived carbon; Suberin; Plant belowground biomass; Biomarker; Deep-ploughing; Carbon storage; Subsoil
语种	英语
WOS研究方向	Geochemistry & Geophysics
WOS类目	Geochemistry & Geophysics
WOS记录号	WOS:001203047300001
来源期刊	ORGANIC GEOCHEMISTRY
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/289770
作者单位	University of Bonn; Johann Heinrich von Thunen Institute
推荐引用方式 GB/T 7714	Burger, D. J.,Bauke, S. L.,Schneider, F.,et al. Root-derived carbon stocks in formerly deep-ploughed soils - A biomarker-based approach[J],2024,190.
APA	Burger, D. J.,Bauke, S. L.,Schneider, F.,Kappenberg, A.,&Gocke, M. I..(2024).Root-derived carbon stocks in formerly deep-ploughed soils - A biomarker-based approach.ORGANIC GEOCHEMISTRY,190.
MLA	Burger, D. J.,et al."Root-derived carbon stocks in formerly deep-ploughed soils - A biomarker-based approach".ORGANIC GEOCHEMISTRY 190(2024).