High Temperature and Salinity Enhance Soil Nitrogen Mineralization in a Tidal Freshwater Marsh

Gao, Haifeng; Bai, Junhong; He, Xinhua; Zhao, Qingqing; Lu, Qiongqiong; Wang, Junjing

doi:10.1371/journal.pone.0095011

Cited by 35 publications

(20 citation statements)

References 44 publications

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“…(14) also indicated that µ w1 showed an increasing trend with increasing salinity level. Therefore, we considered that although salinity could reduce µ w1 , an extremely high soil salinity level (> 24.42 dS·m -1 ) might increase µ w1 because of the increased ammonium-nitrogen adsorption with soil salinity, and similar results were obtained in the studies of Noe et al [36] and Gao et al [37].…”

Section: Discussionsupporting

confidence: 67%

“…Nkrumah et al [42] noted that urea required a significant amount of time to transform into nitrogen, especially in irrigation conditions. In addition, both Gao et al [37] and Khoi et al [21] observed that the adverse effects of salinity on nitrogen mineralization were short-lived, whereas the rate of nitrogen mineralization recovered in later periods. Thus, a long incubation time is necessary in future studies to confirm this aspect.…”

Section: Discussionmentioning

confidence: 97%

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Nitrogen Transportation and Transformation Under Different Soil Water and Salinity Conditions

Zeng

Huang

et al. 2016

Ecological Chemistry and Engineering S

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Soil nitrogen transportation and transformation are important processes for crop growth and environmental protection, and they are influenced by various environmental factors and human interventions. This study aims to determine the effects of irrigation and soil salinity levels on nitrogen transportation and transformation using two types of experiments: column and incubation. The HYDRUS-1D model and an empirical model were used to simulate the nitrogen transportation and transformation processes. HYDRUS-1D performed well in the simulation of nitrogen transportation and transformation under irrigated conditions (R 2 as high as 0.944 and 0.763 for ammonium and nitrate-nitrogen simulations, respectively). In addition, the empirical model was able to attain accurate estimations for ammonium (R 2 = 0.512-0.977) and nitrate-nitrogen (R 2 = 0.410-0.679) without irrigation. The modelling results indicated that saline soil reduced the rate of urea hydrolysis to ammonium, promoted the longitudinal dispersity of nitrogen and enhanced the adsorption of ammonium-nitrogen. Furthermore, the effects of soil salinity on the nitrification rate were not obviously comparable to the effects of the amount of irrigation water. Without irrigation, the hydrolysis rate of urea to ammonium decreased exponentially with the soil salinity (R 2 = 0.787), although the nitrification coefficient varied with salinity. However, the denitrification coefficient increased linearly with salinity (R 2 = 0.499).

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Section: Discussionsupporting

confidence: 67%

Section: Discussionmentioning

confidence: 97%

Nitrogen Transportation and Transformation Under Different Soil Water and Salinity Conditions

Zeng

Huang

et al. 2016

Ecological Chemistry and Engineering S

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“…It was found that increased salinity may also support mineralization of nitrogen (NH 4 + -N a NO 3 -N) in soils [22][23]. Pathak and Rao [13] report that nitrogen mineralization may continue despite the microbial activity being supressed by the presence of salts.…”

Section: Resultsmentioning

confidence: 99%

The Effect of Salinity on Native Proteolytic Activity in Soil

Holík¹,

Vranová²,

Rejšek³

2017

Pol. J. Environ. Stud.

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Salinization of soil has a negative impact on the activity of microorganisms and thus leads to disturbances in the cycling of nutrients in the soil environment. Our goal was to determine what amount of salt has some measurable negative effect on enzymatic activity of soils, namely on native proteases. Inhibition of proteases was detected at as little as 0.5 mg of chloride salts in an organomineral horizon from an oak stand, but in most cases, some inhibitory effect appeared from 1-2 mg of salt added to the soil. Although the stimulatory effects of salt were also observed, in those cases it probably was not associated with activity of the microbial community. Our results indicate the levels from which the activity of microorganisms will probably decrease and organic matter decomposition will be slowed.

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“…As the main elements supporting life on earth system, the C, N, P, S cycles in soil have been altered by human activity through land-use change, agricultural intensification, and use of fossil fuels (Vitousek et al 1997;Matson and Vitousek 2006;Stevenson et al 2010;Song and Liu 2013;Liu et al 2012). With improved knowledge of how human activity affects the C, N, P, S cycles in soil, recommendations for safety of human health, other living organisms, and natural ecosystems might be improved (González-Chávez et al 2010;Bai et al 2013).…”

Section: Introductionmentioning

confidence: 99%

“…Harrison-Kirk et al (2014) evaluated the response of C and N fractions to dry-wet cycles and their availability as substrates for C and N mineralizations along a SOM gradient in two soils of differing textures. González-Chávez et al (2010) determined the effects of long-term (25 years) no-till and conventional tillage management and cropping sequence and a rotation of sorghum, wheat, and soybean on soil microbial community structure and labile and recalcitrant microbial bioproducts related to soil C, N, and P pools in central Texas. Bejarano et al (2014) determined the impact of elevated N input on C and N dynamics in soils collected from three mature seasonally dry tropical forests (SDTF) along a precipitation gradient in Yucatan (Mexico).…”

Section: Introductionmentioning

confidence: 99%

The spatial relationship between human activities and C, N, P, S in soil based on landscape geochemical interpretation

Kong

et al. 2015

Environ Geochem Health

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The development and formation of chemical elements in soil are affected not only by parent material, climate, biology, and topology factors, but also by human activities. As the main elements supporting life on earth system, the C, N, P, S cycles in soil have been altered by human activity through land-use change, agricultural intensification, and use of fossil fuels. The present study attempts to analyze whether and how a connection can be made between macroscopical control and microcosmic analysis, to estimate the impacts of human activities on C, N, P, S elements in soil, and to determine a way to describe the spatial relationship between C, N, P, S in soil and human activities, by means of landscape geochemical theories and methods. In addition, the disturbances of human activities on C, N, P, S are explored through the analysis of the spatial relationship between human disturbed landscapes and element anomalies, thereby determining the diversified rules of the effects. The study results show that the rules of different landscapes influencing C, N, P, S elements are diversified, and that the C element is closely related to city landscapes; furthermore, the elements N, P, and S are shown to be closely related to river landscapes; the relationships between mine landscapes and the elements C, N, P, S are apparent; the relationships between the elements C, N, P, S and road landscapes are quite close, which shows that road landscapes have significant effects on these elements. Therefore, the conclusion is drawn that the response mechanism analysis of human disturbance and soil chemical element aggregation is feasible, based on the landscape geochemical theories and methods. The spatial information techniques, such as remote sensing and geographic information systems, are effective for research on soil element migration.

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High Temperature and Salinity Enhance Soil Nitrogen Mineralization in a Tidal Freshwater Marsh

Cited by 35 publications

References 44 publications

Nitrogen Transportation and Transformation Under Different Soil Water and Salinity Conditions

Nitrogen Transportation and Transformation Under Different Soil Water and Salinity Conditions

The Effect of Salinity on Native Proteolytic Activity in Soil

The spatial relationship between human activities and C, N, P, S in soil based on landscape geochemical interpretation

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