Soil and plant nitrogen pools in paddy and upland ecosystems have contrasting δ15N

Lim, Sang-Sun; Kwak, Jin‐Hyeob; Lee, Kwang-Seung; Chang, Scott X.; Yoon, Kwang‐Sik; Kim, Han-Yong; Choi, Woo‐Jung

doi:10.1007/s00374-014-0967-y

Cited by 23 publications

(13 citation statements)

References 49 publications

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“…With the reduction of produced NO 3 - progresses in the lower anaerobic soil layers, NO 3 - is serially converted to nitrite (NO 2 - ), nitric oxide (NO), N 2 O, and N 2 gas [26, 27]. Consequently, relatively lower δ 15 N soil NH 4 + and higher δ 15 N soil NO 3 - were observed in waterlogged paddy soil due to restricted nitrification in saturated soil conditions [28]. The N form of NH 4 + has a negative correlation with soil δ 15 N in the 10–20 cm soil layer.…”

Section: Discussionmentioning

confidence: 99%

The dynamics of nitrogen derived from a chemical nitrogen fertilizer with treated swine slurry in paddy soil-plant systems

Lee

Choi

2017

PLoS ONE

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A well-managed chemical nitrogen (N) fertilization practice combined with treated swine slurry (TSS) is necessary to improve sustainability and N use efficiency in rice farming. However, little is known about the fate of N derived from chemical N fertilizer with and without TSS in paddy soil-plant systems. The objectives of this study were (1) to estimate the contribution of applied N fertilizer to N turnover in rice paddy soil with different N fertilization practices that were manipulated by the quantity of treated swine slurry and chemical N fertilizer (i.e., HTSS+LAS, a high amount of TSS with a low amount of ammonium sulfate; LTSS+HAS, a low amount of TSS with a high amount of ammonium sulfate; AS, ammonium sulfate with phosphorus and potassium; C, the control) and (2) to compare the rice response to applied N derived from each N fertilization practice. Rice biomass yield, 15N recovery in both rice grain and stems, soil total N (TN), soil inorganic N, and soil 15N recovery were analyzed. Similar amounts of 15N uptake by rice in the TSS+AS plots were obtained, indicating that the effects of the different quantities of TSS on chemical fertilizer N recovery in rice during the experimental period were not significant. The soil 15N recoveries of HTSS+LAS, LTSS+HAS, and AS in each soil layer were not significantly different. For the HTSS+LAS, LTSS+HAS and AS applications, total 15N recoveries were 42%, 43% and 54%, respectively. Because the effects of reducing the use of chemical N fertilizer were attributed to enhancing soil quality and cost-effectiveness, HTSS+LAS could be an appropriate N fertilization practice for improving the long-term sustainability of paddy soil-plant systems. However, N losses, especially through the coupled nitrification-denitrification process, can diminish the benefits that HTSS+LAS offers.

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Section: Discussionmentioning

confidence: 99%

The dynamics of nitrogen derived from a chemical nitrogen fertilizer with treated swine slurry in paddy soil-plant systems

Lee

Choi

2017

PLoS ONE

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“…However, overuse of N fertilizer causes many forms of N loss, such us leaching of NO 3 − derived from nitrification, releasing of N 2 and nitrogen oxides (NO X ) after denitrification, and ammonia (NH 3 ) volatilization, and these N losses generally lead to 15 N enrichment in the remaining SON [21]. Thus, the δ 15 N SON is generally used as a coarse indicator of the N sources and loss processes in the agroecosystem [22,23]. Improved understanding of soil N processes is important for the coordination between fertilization availability and environmental influence in agricultural lands [24].…”

Section: Introductionmentioning

confidence: 99%

Variations and Indications of δ13CSOC and δ15NSON in Soil Profiles in Karst Critical Zone Observatory (CZO), Southwest China

et al. 2019

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Soil carbon and nitrogen storage and stabilization are the key to solving the problems of mitigation of global warming and maintaining of crop productivity. In this study, the contents of soil organic carbon (SOC) and soil organic nitrogen (SON) and their stable isotope compositions (δ13CSOC and δ15NSON) in soil profiles were determined in two agricultural lands (including a farmland and an abandoned farmland) and four non-agricultural lands (including two shrub-grass lands and two shrub lands) in the karst critical zone observatory (CZO), Southwest China. The contents of SOC and SON were used for research on the effects of land use on SOC and SON storage, and the change of δ13CSOC and δ15NSON values in soil profiles were used to indicate SOC and SON stabilization. The results showed that agricultural activities reduced SOC and SON storage in the whole soil layers of farmland compared to non-agricultural lands, and farmland abandonment slightly increased SOC and SON storage. Crop rotation between peanut (C3) and corn (C4) affected the δ13CSOC in surface soils of agricultural lands (−21.6‰), which were intermediate between shrub lands (−22.7‰) and shrub-grass lands (−19.6‰). 15N-depleted SON in surface soils in farmland compared to those soil in other lands possibly associated with synthetic N fertilizer application. In soil layers below 30 cm depth the δ13CSOC deceased with depth, while the δ15NSON displayed irregular fluctuation. The change in δ13CSOC and δ15NSON through soil profiles in karst soils were more intensive than those in semiarid grassland soils indicating the less stabilization of SOC and SON in karst soils.

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“…With the wide application of stable isotope technology in earth surface environments ( Li et al, 2022 ; Zeng et al, 2022 ), the stable N isotope ratio ( 15 N/ 14 N, δ 15 N) has been also widely applied to evaluate soil N cycling patterns in various ecosystems ( Kayler et al, 2011 ; Lim et al, 2015 ; Pardo et al, 2007 ). Soil δ 15 N composition can be affected by different N sources and a series of transformation processes, such as symbiotic N fixation with mycorrhiza ( Hobbie & Ouimette, 2009 ; Taylor, Chazdon & Menge, 2019 ), atmospheric N deposition ( Currie, Nadelhoffer & Aber, 2004 ; Liu, Yeh & Sheu, 2006 ), plant uptake and microbial assimilation ( Fowler et al, 2013 ; Waser et al, 1998 ), soil organic nitrogen (SON) mineralization ( Liu et al, 2017 ; Zhang et al, 2015 ), nitrification and denitrification ( Robinson, 2001 ; Galloway et al, 2008 ), and ammonia (NH 3 ) volatilization ( Choi et al, 2017 ).…”

Section: Introductionmentioning

confidence: 99%

“…Thus, the application of N fertilizer alters the original soil N cycling patterns, as well as the δ 15 N composition of different N pools ( Choi et al, 2017 ). Theoretically, soil N transformation processes can be inferred when the δ 15 N composition and the flux of N sources are known, and vice versa ( Lim et al, 2015 ). However, it is incorrect to assume a single soil δ 15 N abundance to indicate soil N sources or processes in agricultural ecosystems ( Kayler et al, 2011 ; Koopmans et al, 1997 ).…”

Section: Introductionmentioning

confidence: 99%

Stable nitrogen and carbon isotope compositions in plant-soil systems under different land-use types in a red soil region, Southeast China

Liu

Han

2022

PeerJ

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Background Stable N isotope compositions in plant-soil systems have been widely used to indicate soil N transformation and translocation processes in ecosystems. However, soil N processes and nitrate (${\mathrm{NO}}_{3}^{-}$) loss potential under different land-use types are short of systematic comparison in the red soil region of Southeast China. Methods In the present study, the stable N and C isotope compositions (δ15N and δ13C) of soil and leaf were analyzed to indicate soil N transformation processes, and the soil to plant 15N enrichment factor (EF) was used to compare soil ${\mathrm{NO}}_{3}^{-}$ loss potential under different land-use types, including an abandoned agricultural land, a natural pure forest without understory, and a natural pure forest with a simple understory. Results The foliar δ15N value (−0.8‰) in the abandoned agricultural land was greater than those of the forest lands (ranged from −2.2‰ to −10.8‰). In the abandoned agricultural land, δ15N values of soil organic nitrogen (SON) increased from 0.8‰ to 5.7‰ and δ13C values of soil organic carbon (SOC) decreased from −22.7‰ to −25.9‰ with increasing soil depth from 0–70 cm, mainly resulting from SON mineralization, soil organic matter (SOM) decomposition, and C4 plant input. In the soils below 70 cm depth, δ15N values of SON (mean 4.9‰) were likely affected by microbial assimilation of 15N-depleted ${\mathrm{NO}}_{3}^{-}$. The variations in δ15N values of soil profiles under the two forests were similar, but the EF values were significant different between the pure forest with a simple understory (−10.0‰) and the forest without understory (−5.5‰). Conclusions These results suggest that soil to plant 15N enrichment factor have a great promise to compare soil ${\mathrm{NO}}_{3}^{-}$ loss potential among different ecosystems.

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Soil and plant nitrogen pools in paddy and upland ecosystems have contrasting δ15N

Cited by 23 publications

References 49 publications

The dynamics of nitrogen derived from a chemical nitrogen fertilizer with treated swine slurry in paddy soil-plant systems

The dynamics of nitrogen derived from a chemical nitrogen fertilizer with treated swine slurry in paddy soil-plant systems

Variations and Indications of δ13CSOC and δ15NSON in Soil Profiles in Karst Critical Zone Observatory (CZO), Southwest China

Stable nitrogen and carbon isotope compositions in plant-soil systems under different land-use types in a red soil region, Southeast China

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