Effects of N Addition Frequency and Quantity on Hydrocotyle vulgaris Growth and Greenhouse Gas Emissions from Wetland Microcosms

Li, Qianwei; Zhang, Xiaoya; Gao, Jun-Qin; Song, Minghua; Jinfeng, Liang; Yue, Yi

doi:10.3390/su11061520

Cited by 8 publications

(4 citation statements)

References 42 publications

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“…Jia et al found that N 2 O emissions increased by 134% under high N treatment in a study of coastal wetlands [31]. Similarly, N levels significantly contribute to N 2 O emissions in the urban wetland in Zhejiang Province, China [32]. Song et al concluded that N addition increased N 2 O emissions by 54.53% in permafrost peatland [33].…”

Section: Discussionmentioning

confidence: 99%

The Responses of N2O, CO2 Emissions, and Bacterial Communities to Nitrogen Addition in Saline–Alkaline Wetlands of Northeast China

Su,

Liang,

et al. 2023

Atmosphere

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The Zhalong Wetland is impacted by elevated atmospheric nitrogen (N) deposition and N inputs from agricultural fertilization, which in turn affect greenhouse gas (GHG) emissions. It is unclear how N addition affects nitrous oxide (N2O) and carbon dioxide (CO2) emissions in this wetland. Therefore, we conducted a short-term experiment, collecting soil samples from three representative points with different water levels, and five N addition levels (N0 = 0 mg N kg−1, N10 = 10 mg N kg−1, N30 = 30 mg N kg−1, N50 = 50 mg N kg−1, N100 = 100 mg N kg−1) were used to simulate N input. Overall, N2O emissions were significantly increased by N addition. Differently, N addition had a significant suppressive effect on CO2 emissions in high-flooded soils, whereas the highest CO2 emissions were regarded under the N30 treatment in middle-flooded and dry soils. Through Pearson’s correlation analysis, we found a significant positive correlation between N2O emissions and ammonium (NH4+), and CO2 emission was significantly positively correlated with pH and total organic carbon (TOC). Meanwhile, the bacterial community of the soil was analyzed via high-throughput sequencing. The results revealed that N addition was not significantly affecting soil bacterial community structure, while the three points were significantly different. Among them, the relative abundance of the dominant genera of Trichoderma and Pseudomonas were significantly enhanced after N addition. Furthermore, the bacterial communities were found to be significantly correlated with soil pH, TOC, NH4+, and nitrate contents, which affected N2O and CO2 emissions.

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Section: Discussionmentioning

confidence: 99%

The Responses of N2O, CO2 Emissions, and Bacterial Communities to Nitrogen Addition in Saline–Alkaline Wetlands of Northeast China

Su,

Liang,

et al. 2023

Atmosphere

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“…The species can reproduce both sexually and asexually; therefore, it has spread extensively to some wetlands in China, such as Hangzhou Bay [39]. This species is now considered invasive in China [40,43,44].…”

Section: Plant Materialsmentioning

confidence: 99%

“…P and T represent the air pressure (kPa) and temperature (K) in situ. H represents the height of the gas-sampling box (m) [43,53]. The cumulative emission fluxes of the greenhouse gases were calculated by the following formula:…”

Section: Greenhouse Gas Emissionsmentioning

confidence: 99%

Genotypic Diversity Improves Photosynthetic Traits of Hydrocotyle vulgaris and Alters Soil Organic Matter and N2O Emissions of Wetland Microecosystems

Cai

Sun

Qin

et al. 2022

Water

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In plant communities, genotypic diversity can impact the plant community structure and ecosystem functions, but related research has focused on native plants. Therefore, whether genotypic diversity affects the growth of invasive plants and then changes the wetland microecosystem remains unresolved. In this study, six different genotypes of Hydrocotyle vulgaris, a common invasive plant in China, were selected to construct populations with three different genotypic diversity levels (one, three, and six genotype combinations, respectively) to explore the effects of different genotypic diversity levels on the growth and physiological traits of H. vulgaris, and soil nutrients and greenhouse gas emissions of the wetland microecosystem under flooding conditions. We found that genotypic diversity improved the leaf area, root to shoot ratio and photosynthetic physiological traits of H. vulgaris, especially under flooding. Moreover, genotypic diversity increased soil organic matter (SOM) contents in the wetland microecosystem, while it reduced the cumulative nitrous oxide emissions under flooding conditions. Overall, genotype diversity improved photosynthetic traits of H. vulgaris, further increased SOM, and reduced the N2O emissions of the wetland microecosystem. The results of this study can provide a theoretical basis for exploring how genotypic diversity levels affect the invasiveness of invasive plants and ecosystems in wetland microecosystems.

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“…SOC mainly is produced from root exudates and the decomposition of litter and crop residues [3][4][5]. The progress is susceptible to cultivation practices, which adjust soil environments, i.e., the soil pH, soil water content, enzyme activities, and soil microbes [6][7][8][9]. Kuzyakov and Domanski (2000) noted that wheat and barley transport about 30% of the assimilated C production into soil [10].…”

Section: Introductionmentioning

confidence: 99%

Corn and Rice Cultivation Affect Soil Organic and Inorganic Carbon Storage through Altering Soil Properties in Alkali Sodic Soils, Northeast of China

Wang

Tang

et al. 2020

Sustainability

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Soil organic carbon (SOC) and soil inorganic carbon (SIC) play essential roles in carbon cycling in terrestrial ecosystems; however, the effects of crop cultivation on them are still poorly understood, especially in alkali sodic soils widely distributed in semiarid regions. Alkali sodic soils from cornfields and paddies with cultivation years of 5, 15, and 25 were analyzed here to assess the response of soil properties and soil carbon pools to crop cultivation. Soil pH and exchangeable sodium percentages decrease in accordance with cultivation years, while enzyme activity (amylase, invertase, and catalase) shows a contrary trend. Soil pH and exchangeable sodium percentages are negatively correlated with SOC, but positively correlated with SIC. Redundancy analysis reveals an obvious relationship between SOC and invertase activity. The percentage of δ 13 C SOC found here is approximately -24.78% to -22.97% for cornfields and approximately -26.54% to -23.81% for paddies, suggesting that crop cultivation contributes to SOC sequestration and stocking, increasing with cultivation years. The percentage of δ 13 C SIC found here is approximately 1.90% to 3.73% , proving that lithogenic inorganic carbon is the major SIC, where the stock decreases with increasing cultivation years. Significant total carbon stock loss is observed in cornfields, while it is preserved at 120 Mg ha −1 in paddies. We conclude here from the results that corn and rice cultivation reduce alkali sodic conditions in soil, thereby improving soil enzymes and favoring SOC stocking, but reducing SIC stocks.

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Effects of N Addition Frequency and Quantity on Hydrocotyle vulgaris Growth and Greenhouse Gas Emissions from Wetland Microcosms

Cited by 8 publications

References 42 publications

The Responses of N2O, CO2 Emissions, and Bacterial Communities to Nitrogen Addition in Saline–Alkaline Wetlands of Northeast China

The Responses of N2O, CO2 Emissions, and Bacterial Communities to Nitrogen Addition in Saline–Alkaline Wetlands of Northeast China

Genotypic Diversity Improves Photosynthetic Traits of Hydrocotyle vulgaris and Alters Soil Organic Matter and N2O Emissions of Wetland Microecosystems

Corn and Rice Cultivation Affect Soil Organic and Inorganic Carbon Storage through Altering Soil Properties in Alkali Sodic Soils, Northeast of China

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