Study of soil nitrogen cycling processes based on the 15N isotope tracking technique in the black soil areas

Zhang, Miao; Li, Tianxiao; Fu, Qiang; Zhang, Shoujie; Su, Anshuang; Xue, Ping; Yang, Xuechen

doi:10.1016/j.jclepro.2022.134173

Cited by 16 publications

(8 citation statements)

References 28 publications

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“…Using Cu as a reference element in combination with the CF-LIBS calculation results (figure 6), the concentrations of Si, Fe, Al, Mg, Mn, Ti, K, Cr and Cd in soil samples, both pre-and post-data filtering, can be calculated from equation (8). The results of Cd are presented in figure 7, where C Cd (standard) denotes the standard concentration of Cd, C Cd (predata filtering) denotes the quantification results of pre-data filtering, and C Cd (post-data filtering) denotes the quantification results of post-data filtering.…”

Section: Accurate Quantitative Multi-element Analysismentioning

confidence: 99%

“…Soil chemical properties are determined using techniques such as inductively coupled plasma mass spectrometry [4], chromatography [5], and atomic absorption spectroscopy [6]. Biological analysis in soil involves the use of quantitative PCR technology [7], high-throughput sequencing techniques [8], and isotope techniques [9]. These methods often involve multiple steps, including sample collection and preparation, which can be time-consuming and operationally complex.…”

Section: Introductionmentioning

confidence: 99%

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Accurate method based on data filtering for quantitative multi-element analysis of soils using CF-LIBS

HAN 韩,

SUN 孙,

ZHANG 张

et al. 2024

Plasma Sci. Technol.

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To obtain more stable spectral data for accurate quantitative analysis of multi-element, especially for the large-area in-situ elements detection of soils, we propose a method for a multi-element quantitative analysis of soils using calibration-free laser-induced breakdown spectroscopy (CF-LIBS) based on data filtering. In this study, we analyze a standard soil sample doped with two heavy metal elements, Cu and Cd, with a specific focus on the line of Cu I 324.75 nm for filtering the experimental data of multiple sample sets. Pre- and post- data filtering, the relative standard deviation for Cu decreased from 30% to 10%, The limits of detection (LOD) values for Cu and Cd decreased by 5% and 4%, respectively. Through CF-LIBS, a quantitative analysis was conducted to determine the relative content of elements in soils. Using Cu as a reference, the concentration of Cd was accurately calculated. The results show that post- data filtering, the average relative error of the Cd decreases from 11% to 5%, indicating the effectiveness of data filtering in improving the accuracy of quantitative analysis. Moreover, the content of Si, Fe and other elements can be accurately calculated using this method. To further correct the calculation, the results for Cd was used to provide a more precise calculation. This approach is of great importance for the large-area in-situ heavy metals and trace elements detection in soil, as well as for rapid and accurate quantitative analysis.

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Section: Accurate Quantitative Multi-element Analysismentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Accurate method based on data filtering for quantitative multi-element analysis of soils using CF-LIBS

HAN 韩,

SUN 孙,

ZHANG 张

et al. 2024

Plasma Sci. Technol.

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“…The stable N isotope ( i.e ., δ 15 N SON ) has also been widely applied to explore N cycling in terrestrial ecosystems ( Liu et al, 2022b ; Yu et al, 2019 ; Zeng et al, 2023 ). Biochemical activities (such as microbiota utilization, plant assimilation, and animal excretion) are the primary factors that induce the large fractionation of δ 15 N SON during the transformation of N ( Liu, Han & Li, 2021 ; Liu et al, 2022a ; Luce et al, 2014 ; Zhang et al, 2022 ). Animal are usually enriched 15 N in the tissues and prefer to excrete 14 N ( He et al, 2015 ).…”

Section: Introductionmentioning

confidence: 99%

“…However, agriculture is the major industry in most areas of Guizhou Province, and is considered an initiator to decrease the storage of soil nutrients. Studies in the field of the N cycling have focused on the discussion of N levels on a large scale or on the dynamics of SON contents only in surface-cultivated soils ( Xiao et al, 2018 ; Zhang et al, 2022 ). Insufficient attention has been paid to the entire soil profile under various land uses in a small catchment with a similar geological background, especially for karst areas with high ecological sensitivity.…”

Section: Introductionmentioning

confidence: 99%

Soil organic nitrogen variation shaped by diverse agroecosystems in a typical karst area: evidence from isotopic geochemistry

Han,

Zhang,

2024

PeerJ

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Background Soil organic nitrogen (SON) levels can respond effectively to crop metabolism and are directly related to soil productivity. However, simultaneous comparisons of SON dynamics using isotopic tracing in diverse agroecosystems are lacking, especially in karst areas with fragile ecology. Methods To better understand the response of SON dynamics to environmental changes under the coupling of natural and anthropogenic disturbances, SON contents and their stable N isotope (δ15NSON) compositions were determined in abandoned cropland (AC, n = 16), grazing shrubland (GS, n = 11), and secondary forest land (SF, n = 20) from a typical karst area in southwest China. Results The SON contents in the SF (mean: 0.09%) and AC (mean: 0.10%) profiles were obviously lower than those in the GS profile (mean: 0.31%). The δ15NSON values ranged from 4.35‰–7.59‰, 3.79‰–7.23‰, and 1.87‰–7.08‰ for the SF, AC, and GS profiles, respectively. Decomposition of organic matter controlled the SON variations in the secondary forest land by the covered vegetation, and that in the grazing shrubland by goat excreta. δ15NSON ranges were controlled by the covered vegetation, and the δ15NSON fractionations during SON transformation were influenced by microorganisms in all surface soil. Conclusions The excreta of goats that contained 15N-enriched SON induced a heavier δ15NSON composition in the grazed shrubland. Long-term cultivation consumes SON, whereas moderate grazing increases SON content to reduce the risk of soil degradation. This study suggests that optimized crop-livestock production may benefit the sustainable development of agroecosystems in karst regions.

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“…The slope-gully system of the Loess Plateau is the main source of sediment in the basin, and it is also the basic unit for controlling soil erosion and for restoring and rebuilding the ecological environment [ 45 , 46 , 47 ] For many years, researchers have studied the effects of erosion and sediment production in the slope-gully system, and have conducted in-depth research on the temporal and spatial changes of the erosion mode, the slope-gully system formation [ 46 , 48 ], the sediment source, and the ectopic erosion effect of water and sand from above [ 49 , 50 ]. Black soil erosion mainly refers to the black soil region in northeastern China; the black soil loses the protection of vegetation due to the high-intensity reclamation and unreasonable demands of farming by humans [ 46 ] and because rainfall intensity is high in summer [ 51 ], both of which accelerate soil erosion and then aggravate the loss of water, fertilizer, and soil, further reducing land productivity in the black soil region [ 52 , 53 ]. Meanwhile, accelerated soil erosion would aggravate floods and affect the comprehensive development and utilization of water and soil resources [ 51 , 54 , 55 , 56 , 57 ], etc.…”

Section: Introductionmentioning

confidence: 99%

The Influence of Short-Term Heavy Rainfall on Hydraulic Characteristics and Rill Formation in the Yuanmou Dry-Hot Valley

Luo

Ma²,

Wang³

et al. 2022

IJERPH

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Rill erosion is one of the major environmental problems in the world; it is an important factor with regard to land degradation and has a serious impact on production and daily life in the region. The widely distributed Yuanmou group stratum promotes the development of rill erosion, whereby the strong time-concentrated rainfall and the alternating arid-humid climate prepare the ground for the development of rills in soils. Therefore, a study of the processes of slope rill erosion was carried out, and a gravel-soil slope in the Yuanmou dry-hot valley was chosen to simulate short-term heavy rainfall (25 mm/h) (No. 1 plot) and moderate rainfall (15 mm/h) (No. 2 plot), to study the erosion processes of soil and the dynamic characteristics of runoff involved in erosion. The study results showed that the width of runoff was significantly different between the two plots, while the depth of runoff was not significantly different. During the rill formation process, the width of the two plots first decreased and then increased with increasing washout duration, while its depth did not change significantly. Flow was the key factor in determining the hydraulic characteristics of runoff, and it had a significant or extremely significant positive correlation with hydraulic characteristics parameters, except in the case of Fr (Froude number) (r = 0.039). The total sediment content (CS) of plot No. 1 (0.158 g/cm3) was significantly different from that of plot No. 2 (0.153 g/cm3), and both CSs in the two plots decreased with increasing washout duration. The CS had an extremely significant negative correlation with τ (runoff shear force) (r = −0.863 **) and DW-f (Darcy-Weisbach drag coefficient) (r = −0.863 **) and a significant negative correlation with Re (Reynolds number) (r = −0.735 *) in the short-term heavy rainfall experiment, while the CS had a significant positive correlation with V (velocity) (r = 0.814 *), R (hydraulic radius) (r = 0.811 *) and P (unit stream power) (r = 0.811 *) in the moderate rainfall experiment. The results of this study will help guide further examination of the processes involved in the dynamic mechanisms of rill erosion on slopes under short-term heavy rainfall conditions.

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Study of soil nitrogen cycling processes based on the 15N isotope tracking technique in the black soil areas

Cited by 16 publications

References 28 publications

Accurate method based on data filtering for quantitative multi-element analysis of soils using CF-LIBS

Accurate method based on data filtering for quantitative multi-element analysis of soils using CF-LIBS

Soil organic nitrogen variation shaped by diverse agroecosystems in a typical karst area: evidence from isotopic geochemistry

The Influence of Short-Term Heavy Rainfall on Hydraulic Characteristics and Rill Formation in the Yuanmou Dry-Hot Valley

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