气候变化领域集成服务门户(CCPortal): Compositional tracking of dissolved organic matter in semiarid wheat-based cropping systems using fluorescence EEMs-PARAFAC and absorbance spectroscopy

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DOI	10.1016/j.jaridenv.2019.04.013
	Compositional tracking of dissolved organic matter in semiarid wheat-based cropping systems using fluorescence EEMs-PARAFAC and absorbance spectroscopy
	Romero C.M.; Engel R.E.; D'Andrilli J.; Miller P.R.; Wallander R.
发表日期	2019
ISSN	1401963
起始页码	34
结束页码	42
卷号	167
英文摘要	We conducted this study to quantify long-term cropping related changes in soil organic carbon (SOC)stocks and characterize the optical properties of dissolved organic matter (DOM)after a decadal on-farm experiment in Montana, USA. Soil samples (0–50 cm)were collected from minimum till (MT)and no-till (NT)fields under fallow-winter wheat (Triticum aestivum L.; F-W)and pea-winter wheat (Pisum sativum L.; P-W)rotations. Stocks of SOC(0–50 cm) averaged 65.6 Mg C ha−1 and 60.6 Mg C ha−1 for P-W and F-W, respectively. The net SOC accretion rate for P-W equated to 0.61 Mg ha−1 yr−1 relative to F-W. We used absorbance spectroscopy and excitation-emission matrices to characterize DOM composition of samples collected from MT F-W and NT P-W. The two cropping systems exhibited similar estimates of aromaticity (absorbance at 254 nm; 0.33–0.39 a.u.)and humification index (1.83–1.86). Parallel factor (PARAFAC)analysis revealed humic-like (C1, C2), monolignol/amino acid-like (C3), and amino acid-/tannin-like (C4)components with equivalent fluorescent intensities among MT F-W and NT P-W. Fluorescence efficiencies increased with depth, suggesting a shift from larger, plant-like material to smaller, microbial-derived precursors. Overall, we found DOM composition to be minimally affected by cropping systems in this semiarid climate of the northern Great Plains. Elsevier Ltd
英文关键词	Excitation emission matrices; Humification; Northern great plains; Soil C sequestration
scopus关键词	absorbance; carbon sequestration; cropping practice; detection method; dissolved organic matter; fluorescence; humification; organic carbon; semiarid region; soil carbon; spectroscopy; tracking; wheat; Great Plains; Montana; United States; Pisum sativum; Triticum aestivum
来源期刊	Journal of Arid Environments
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/176383
作者单位	Land Resources and Environmental Sciences, Montana State University, 334 Leon Johnson Hall, Bozeman, MT 59717-3120, United States
推荐引用方式 GB/T 7714	Romero C.M.,Engel R.E.,D'Andrilli J.,et al. Compositional tracking of dissolved organic matter in semiarid wheat-based cropping systems using fluorescence EEMs-PARAFAC and absorbance spectroscopy[J],2019,167.
APA	Romero C.M.,Engel R.E.,D'Andrilli J.,Miller P.R.,&Wallander R..(2019).Compositional tracking of dissolved organic matter in semiarid wheat-based cropping systems using fluorescence EEMs-PARAFAC and absorbance spectroscopy.Journal of Arid Environments,167.
MLA	Romero C.M.,et al."Compositional tracking of dissolved organic matter in semiarid wheat-based cropping systems using fluorescence EEMs-PARAFAC and absorbance spectroscopy".Journal of Arid Environments 167(2019).