Co-effects of salinity and moisture on CO2 and N2O emissions of laboratory-incubated salt-affected soils from different vegetation types

Zhang, Lihua; Song, Liangcheng; Wang, Bing-Chen; Shao, Hongbo; Zhang, Liwen; Qin, Xiaochun

doi:10.1016/j.geoderma.2018.06.025

Cited by 47 publications

(29 citation statements)

References 68 publications

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“…This suggests that CO 2 emissions in the plots that were treated with low salinity water under different regimes are similar. In the present study, there was a negative correlation between irrigation water salinity and CO 2 emission, which agrees with previous experiments [10,31]. The ion toxicity (Na + specifically) [32], osmotic potential imbalance [30,33], or interaction of them [31] may reduce the activity of heterotrophic soil microorganisms, and then inhibit CO 2 emission.…”

Section: Discussionsupporting

confidence: 91%

“…In literature, some researchers focused on the interaction of GHG emissions and salt from soil or water [10,11,12]. Yang, et al [13] studied the saline-alkaline soil and found that, when compared with low saline-alkaline soil, high saline-alkaline soil significantly increased Global Warming Potential (GWP) by raising N 2 O emission and reducing CH 4 uptake.…”

Section: Introductionmentioning

confidence: 99%

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CO2 and N2O Emissions from Spring Maize Soil under Alternate Irrigation between Saline Water and Groundwater in Hetao Irrigation District of Inner Mongolia, China

Wang

Yang

Ren

et al. 2019

IJERPH

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Alternative irrigation between saline water and groundwater can alleviate shortages of available agricultural water while effectively slowing the adverse effects of saline water on the soil-crop system when compared with continuous irrigation with saline water and blending irrigation between saline water and groundwater. In 2018, we tested the effect on soil CO2 and N2O emissions by two types of irrigation regimes (alternating groundwater and saline water (GW-SW), and alternating groundwater, followed by two cycles of saline water (GW-SW-SW)) between groundwater and three levels of salinity of irrigation water (mineralization of 2 g/L, 3.5 g/L, and 5 g/L), analyzed the correlation between gas emissions and soil properties, calculated comprehensive global warming potential (GWP), and investigated the maize yield. The results show that, with the same alternate irrigation regime, cumulative CO2 emissions decreased with increasing irrigation water salinity, and cumulative N2O emissions increased. Cumulative CO2 emissions were higher in the GW-SW regime for the same irrigation water salinity, and cumulative N2O emissions were higher in the GW-SW-SW regime. The GW-SW-SW regime had less comprehensive GWP and maize yield as compared to the GW-SW regime. The 2 g/L salinity in both regimes showed larger comprehensive GWP and maize yield. The 3.5 g/L salinity under the GW-SW regime will be the best choice while considering that the smaller comprehensive GWP and the larger maize yield are appropriate for agricultural implication. Fertilizer type and irrigation amount can be taken into consideration in future research direction.

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Section: Discussionsupporting

confidence: 91%

Section: Introductionmentioning

confidence: 99%

CO2 and N2O Emissions from Spring Maize Soil under Alternate Irrigation between Saline Water and Groundwater in Hetao Irrigation District of Inner Mongolia, China

Wang

Yang

Ren

et al. 2019

IJERPH

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“…Salinity is one of the most important factors affecting soil respiration in saline-alkali soils, and our study showed that soil respiration decreased with increasing salinity. The negative impact of salinity on soil respiration was in agreement with previous studies [34,[40][41]. Salinity/alkalinity played a more important role in regulating soil respiration through its effects on the microorganisms, including microbial biomass, population, community structure and activity [32,34].…”

Section: Discussionsupporting

confidence: 91%

Soil Respiration from Different Halophytic Plants in Coastal Saline-Alkali Soils

Li¹,

Liu²

2020

Pol. J. Environ. Stud.

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Soil salinity is a crucial constraint in the potential utilization of land resources in the coastal regions of northern China [1]. Most of the lands within these areas are covered with salinized soil and are accompanied by shallow underground water [2]. Excess salinity and alkalinity plagued seed germination and plant growth, and led to environmental degradation [3]. In order to improve these conditions, local governments have launched costal ecological restoration projects, including planting halophytes, to recover degraded vegetation and reduce soil salinization. Halophytic plants can grow well and produce high biomass in saline environments

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“…Reddy and Grohn reported increased N 2 O emissions at higher soil salinity level (15.2–30.6 dS m −1 , EC of soil saturation extract) from a soil with high nitrate (NO 3 − -N) inputs at the beginning of the incubation [ 14 ]. Similar results were also observed by Yu et al and Zhang et al from soils with a low inorganic N concentration [ 16 , 17 ]. It is poorly documented that the response of N 2 O production to salinity in NH 4 + -N -rich soils, that is the exact situation for soils after chemical fertilizers.…”

Section: Introductionsupporting

confidence: 90%

Enhanced N2O Production Induced by Soil Salinity at a Specific Range

Liu

et al. 2020

IJERPH

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Nitrous oxide (N2O) as a by-product of soil nitrogen (N) cylces, its production may be affected by soil salinity which have been proved to have significant negative effect on soil N transformation processes. The response of N2O production across a range of different soil salinities is poorly documented; accordingly, we conducted a laboratory incubation experiment using an array of soils bearing six different salinity levels ranging from 0.25 to 6.17 dS m−1. With ammonium-rich organic fertilizer as their N source, the soils were incubated at three soil moisture ( θ ) levels—50%, 75% and 100% of field capacity ( θ fc )—for six weeks. Both N2O fluxes and concentrations of ammonium, nitrite and nitrate (NH4+-N, NO2−-N and NO3−-N) were measured throughout the incubation period. The rates of NH4+-N consumption and NO3−-N accumulation increased with increasing soil moisture and decreased with increasing soil salinity, while the accumulation of NO2−-N increased first then decreased with increasing soil salinity. N2O emissions were significantly promoted by greater soil moisture. As soil salinity increased from 0.25 to 6.17 dS m−1, N2O emissions from soil first increased then decreased at all three soil moisture levels, with N2O emissions peaking at electric conductivity (EC) values of 1.01 and 2.02 dS m−1. N2O emissions form saline soil were found significantly positively correlated to soil NO2−-N accumulation. The present results suggest that greater soil salinity inhibits both steps of nitrification, but that its inhibition of nitrite oxidation is stronger than that on ammonia oxidation, which leads to higher NO2−-N accumulation and enhanced N2O emissions in soil with a specific salinity range.

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Co-effects of salinity and moisture on CO2 and N2O emissions of laboratory-incubated salt-affected soils from different vegetation types

Cited by 47 publications

References 68 publications

CO2 and N2O Emissions from Spring Maize Soil under Alternate Irrigation between Saline Water and Groundwater in Hetao Irrigation District of Inner Mongolia, China

CO2 and N2O Emissions from Spring Maize Soil under Alternate Irrigation between Saline Water and Groundwater in Hetao Irrigation District of Inner Mongolia, China

Soil Respiration from Different Halophytic Plants in Coastal Saline-Alkali Soils

Enhanced N2O Production Induced by Soil Salinity at a Specific Range

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