Nitrogen cycling in plant and soil subsystems is driven by changes in soil salinity following coastal embankment in typical coastal saltmarsh ecosystems of Eastern China

2022 ◽  
Vol 174 ◽  
pp. 106467
Author(s):  
Hongyu Feng ◽  
Hui Zhao ◽  
Lu Xia ◽  
Wen Yang ◽  
Yongqiang Zhao ◽  
...  
Keyword(s):  
Nitrogen Cycling ◽  
Soil Salinity ◽  
Eastern China

Response of Soil Respiration and Microbial Biomass to Soil Salinity under Different Water Content in the Coastal Areas of Eastern China

2020 ◽  
Vol 53 (1) ◽  
pp. 82-89
Author(s):  
Kechun Wang ◽  
Junzeng Xu ◽  
Yawei Li ◽  
Haiyu Wang ◽  
Qi Wei ◽  
...  
Keyword(s):  
Microbial Biomass ◽  
Soil Respiration ◽  
Water Content ◽  
Soil Salinity ◽  
Eastern China ◽  
Coastal Areas

Nitrogen cycling in forest soils across climate gradients in Eastern China

2011 ◽  
Vol 342 (1-2) ◽  
pp. 419-432 ◽  
Author(s):  
Jinbo Zhang ◽  
Tongbin Zhu ◽  
Zucong Cai ◽  
Christoph Müller
Keyword(s):  
Nitrogen Cycling ◽  
Forest Soils ◽  
Eastern China ◽  
Climate Gradients

Spatial Variation of Soil Salinity in the Coastal Reclamation Area, Eastern China

2014 ◽  
Vol 294 ◽  
pp. 411-417 ◽  
Author(s):  
Yan Xu ◽  
Lijie Pu ◽  
Ming Zhu ◽  
Jianguo Li ◽  
Meng Zhang ◽  
...  
Keyword(s):  
Spatial Variation ◽  
Soil Salinity ◽  
Eastern China ◽  
Coastal Reclamation ◽  
Reclamation Area

How Spartina alterniflora adapts to a new environment created by embankment reclamation through C-N-P stoichiometry in the coastal wetlands of eastern China

2018 ◽  
Vol 69 (5) ◽  
pp. 823 ◽  
Author(s):  
Yajun Qiao ◽  
Wen Yang ◽  
Yuxuan Zhao ◽  
Nasreen Jeelani ◽  
Lingqian Xu ◽  
...  
Keyword(s):  
Soil Moisture ◽  
Plant Growth ◽  
Spartina Alterniflora ◽  
Soil Salinity ◽  
Coastal Wetlands ◽  
Eastern China ◽  
N:P Ratio ◽  
Organic C ◽  
P Content ◽  
Leaf P

Although embankment reclamation is a recurring activity in the coastal wetlands of China, the effect of embankment construction on plant growth has attracted little attention. Leaf carbon, nitrogen and phosphorus stoichiometry (C-N-P stoichiometry) of a plant can be used to reflect plant adaptation to new environments created by reclamation. In the present study we investigated the biomass and leaf C-N-P stoichiometry of Spartina alterniflora Loisel., soil C-N-P stoichiometry and soil moisture, salinity, bulk density and pH in both embankment-reclaimed and natural S. alterniflora salt marshes in eastern China. Plant biomass, leaf P content, soil salinity and soil moisture were significantly lower in the reclaimed compared with natural marsh. The decrease in leaf P content is possibly attributed to changes in soil salinity, soil moisture and soil organic C and N content in the reclaimed marsh. The results of the present study indicate that the decreased aboveground biomass in the reclaimed marsh is likely to be correlated with an increase in the leaf N:P ratio, in accordance with the ‘growth rate hypothesis’. However, previously published threshold values of the N:P ratio as indicators of N or P limitation of plant growth may not be applicable to S. alterniflora at our study site.

scholarly journals A New Approach for Estimating Soil Salinity Using A Low-Cost Soil Sensor In Situ: A Case Study in Saline Regions of China’s East Coast

2020 ◽  
Vol 12 (2) ◽  
pp. 239 ◽  
Author(s):  
Jianjun Wang ◽  
Quan Sun ◽  
Jiali Shang ◽  
Jiahua Zhang ◽  
Fei Wu ◽  
...  
Keyword(s):  
Soil Moisture ◽  
Soil Salinity ◽  
Sandy Loam ◽  
Low Cost ◽  
Eastern China ◽  
Cost Effective ◽  
Curvilinear Relationship ◽  
Coastal Regions ◽  
Vegetation Growth

Accurate and timely information on soil salinity is crucial for vegetation growth and agricultural productivity in coastal regions. This study investigates the potential of using Wifi POGO, an in situ electromagnetic sensor, for soil salinity assessment over saline coastal regions in eastern China. The sensor readings, soil moisture, and temperature-corrected apparent electrical conductivity (ECa) were used to generate models for EC1:5 (a surrogate for soil salinity) estimation. Two salty areas with distinct soil textures, sandy loam (Shuntai) and clay (Dongxin), were selected. This study revealed that the difference between soil salinity and the in situ measured soil ECa (i.e., EC1:5-ECa) had a strong curvilinear relationship with soil moisture. Such a relationship allows for the direct estimation of soil salinity from soil ECa with the aid of soil moisture information. Both ECa and soil moisture can be measured in situ using a Wifi POGO, a low-cost ground-based soil sensor. By using the leave-one-out cross-validation (LOOCV), the achieved root mean square error (RMSE) and relative RMSE (RRMSE) in EC1:5 estimation were 0.0109 S/m and 19.24% respectively in Shuntai, and 0.0157 S/m and 16.05%, in Dongxin. This new method offers a simple, cost-effective and reliable tool for assessing soil salinity in dynamic coastal regions.

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