Spatial distribution characteristics of organic matter and total nitrogen of marsh soils in river marginal wetlands

Bai, Junhong; Ouyang, Hao; Deng, Wei; Zhu, Yanming; Zhang, Xuelin; Wang, Qinggai

doi:10.1016/j.geoderma.2004.04.012

Cited by 170 publications

(102 citation statements)

References 34 publications

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“…Therefore, the elevated bulk density due to drainage could significantly impact C, N, and P storage on a volumetric basis. No significant relationship was observed between C, N, and P contents and soil moisture, despite significant correlations being reported by Tong et al (2005) and Gao (2006) in peat soils and by Bai et al (2005) in marsh soils. Although linear or exponential increase in SOC contents with increasing bulk density was reported by Wu et al (2003), a weak negative correlation was observed between SOC and BD in this study.…”

Section: Effects Of Selected Soil Properties On C N and P Storage Imentioning

confidence: 70%

“…Hefting et al (2004) also found the end product of N mineralisation was nitrate under low water table levels (<-0.30 m), while N loss could only occur by denitrification and leaching due to rainfall events under the above conditions. Bai et al (2005) stated that water table fluctuations in floodplain wetlands could affect nitrogen transformation and mobility.…”

Section: Mean Contents Of C N and P In Drained Peat Soilsmentioning

confidence: 99%

“…Changes in N and P in wetland ecosystems have also received attention, since they are important nutrients for plant growth (Mitsch and Gosselink 2000). However, few studies have been carried out on changes in SOC, N, and P storage in the alpine wetland ecosystems in the Qinghai-Tibet plateau in China, despite their important effects on global changes (Gao 2006) and wetland productivity (Mitsch and Gosselink 2000;Bai et al 2005).…”

Section: Introductionmentioning

confidence: 99%

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Spatial variability of soil carbon, nitrogen, and phosphorus content and storage in an alpine wetland in the Qinghai - Tibet Plateau, China

et al. 2010

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Abstract. This study considers the spatial variability of soil organic carbon, nitrogen, and phosphorus storage in a drained alpine wetland and the possible relationships with soil properties. Top 0-0.30 m soil samples were collected in a typical alpine wetland in the south-eastern Qinghai-Tibet plateau using grid sampling. There was high spatial variability for soil organic carbon density (SOCD), soil total nitrogen density (STND), and soil total phosphorous density (STPD) in the drained alpine wetland. Spherical models best described the structure of the semivariograms for SOCD and STPD, and an exponential model for STND, with the range parameter of <4 m. Similar spatial distribution with lower or higher patches of C, N, and P storage were observed. SOCD, STND, and STPD were significantly negatively correlated with soil moisture (P < 0.01), and significantly positively correlated with bulk density (P < 0.01). However, no significant correlations were observed between SOCD, STND, and STPD and soil pH values. Wetland drainage might lead to higher C, N, and P densities in top 0.30 m soils due to peat compaction; thus, it is necessary to incorporate water table fluctuations or the whole depth of peat layers to estimating precisely C, N and P storage.

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Section: Effects Of Selected Soil Properties On C N and P Storage Imentioning

confidence: 70%

Section: Mean Contents Of C N and P In Drained Peat Soilsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Spatial variability of soil carbon, nitrogen, and phosphorus content and storage in an alpine wetland in the Qinghai - Tibet Plateau, China

et al. 2010

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“…Concentrations of C and N in plants and litters were determined using a Vario EL III Elemental Analyzer (Elementar Scientific Instruments, Germany). Total soil organic C was determined by the K 2 Cr 2 O 7 -H 2 SO 4 digestion method (Sorrell et al 1997;Bai et al 2005). Total soil N was analyzed with the Kjeldahl method (K-370, Buchi Scientific Instruments, Switzerland).…”

Section: Sample Collection and Measurementsmentioning

confidence: 99%

Ecological stoichiometry of C, N, and P of invasive Phragmites australis and native Cyperus malaccensis species in the Minjiang River tidal estuarine wetlands of China

et al. 2015

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Tidal estuarine wetlands of China are rich in plant diversity, but several global change drivers, such as species invasion, are currently affecting the biogeochemical cycles of these ecosystems. We seasonally analyzed the carbon (C), nitrogen (N), and phosphorus (P) concentrations in litters and soils and in leaves, stems, and roots of the C 3 invasive species Phragmites australis (Cav.) Trin. ex Steud.and of the C 4 native species Cyperus malaccensis var. brevifolius Boeckeler to investigate the effect of C 3 plant invasion on C, N, and P stoichiometry in the C 4 plant-dominated tidal wetlands of the Minjiang River. When averaged across seasons, the invasive species P. australis had higher N concentrations and lower P concentrations in leaves than the native species C. malaccensis. N and P concentrations were lower in litter (stem and leaf), whereas C concentrations in leaf litter were higher in P. australis than in C. malaccensis. The C, N, and P concentrations of the soil also did not differ, but plants had a lower C:N and much higher N:P ratios than soils. Root C:P and N:P ratios were lower in the growing season both in the invasive and the native species. The leaf C:N, C:P and N:P ratios peaked in summer. The invasive species had lower C:N ratio in leaves and roots, and higher N:P ratios in all biomass organs and litter than the native species, an effect related with the higher N-resorption capacity of the invasive species. Interspecific differences in C:N, C:P, and N:P ratios may likely reflect the differences in plant morphology, nutrient-use efficiency, and photosynthetic capacity between the C 3 (P. australis) and C 4 (C. malaccensis) plants. Our results generally suggested that the success of P. australis in these wetlands was related to its slow growth and higher resorption capacity of N and P. This implies a more conservative use of limited nutrients, particularly N, by P. australis, and to higher N concentration in its biomass thus potentially contributing to its invasiveness in these estuarine wetlands.Communicated by William E Rogers.Electronic supplementary material The online version of this article

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“…where ı is the soil column length (cm), and t is the total time of the experiment (min); (2) where D ( θ ) are the water diffusion coefficients (cm 2 min -1 ).…”

Section: Nonsaturated Soil Water Diffusionmentioning

confidence: 99%

Water diffusion coefficients of horizontal soil columns from natural saline-alkaline wetlands in a semiarid area

et al. 2007

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-Water diffusion coefficients of soils directly control the solute (such as nitrogen and phosphorous) movement in wetlands, which greatly influences the water quality of rivers. The processes of water diffusion in natural saline-alkaline wetland soils were simulated by using horizontal soil columns from the Erbaifangzi (EBFZ) wetland in the Xianghai National Natural Reserve of China in 2001. The results showed that the water diffusion coefficient was the lowest in the topsoil. It followed the order 0-10 cm < 10-20 cm < 20-60 cm. The water diffusion coefficients decreased exponentially with an increase in the distance but increased exponentially with increases in the volumetric soil water contents. The changing curve of the topsoil was steeper, and the water diffusion coefficients were closely linked with the soil properties such as the SOM and clay contents.

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Spatial distribution characteristics of organic matter and total nitrogen of marsh soils in river marginal wetlands

Cited by 170 publications

References 34 publications

Spatial variability of soil carbon, nitrogen, and phosphorus content and storage in an alpine wetland in the Qinghai - Tibet Plateau, China

Spatial variability of soil carbon, nitrogen, and phosphorus content and storage in an alpine wetland in the Qinghai - Tibet Plateau, China

Ecological stoichiometry of C, N, and P of invasive Phragmites australis and native Cyperus malaccensis species in the Minjiang River tidal estuarine wetlands of China

Water diffusion coefficients of horizontal soil columns from natural saline-alkaline wetlands in a semiarid area

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