19 research outputs found
Soil accumulated ammonium nitrogen over 48 days of laboratory incubation under four temperature and salinity levels.
<p>Soil accumulated ammonium nitrogen over 48 days of laboratory incubation under four temperature and salinity levels.</p
Physico-chemical properties of the tested soil.
<p>SD: Standard deviation.</p
Box-plots of enrichment factors of trace elements in all soil samples of each site of the three in three seasons (a) Spring; (b) Summer; (c) Fall.
<p>Straight lines represent the EF = 2 or 5; dash line represents EF = 1.5.</p
Parameter values used for the effective accumulated temperature model over 48 days of waterlogged incubation experiments.
<p>Parameter values used for the effective accumulated temperature model over 48 days of waterlogged incubation experiments.</p
Profile distributions of As and heavy metals in marsh soils with <i>P. australis</i> (a), <i>T. chinensis</i> (b) and <i>S. salsa</i> (c) in three sampling seasons.
<p>Profile distributions of As and heavy metals in marsh soils with <i>P. australis</i> (a), <i>T. chinensis</i> (b) and <i>S. salsa</i> (c) in three sampling seasons.</p
Relationships between soil texture and Al and heavy metals in typical profiles from three sampling sites in three sampling seasons.
<p>* represents significant correlation at the level of <i>p</i> < 0.05;</p><p>** represents significant correlation at the level of <i>p</i> < 0.01.</p><p>n = 60.</p><p>Relationships between soil texture and Al and heavy metals in typical profiles from three sampling sites in three sampling seasons.</p
Biological concentration factors of the aboveground parts of plants in each site.
<p><sup>abc</sup> Different letters on the error bars represent significant differences (<i>p</i><0.05).</p
Location map of three sampling sites in the Yellow River Delta.
<p>Location map of three sampling sites in the Yellow River Delta.</p
Ordination plots of the PCA results for surface soil samples.
<p>The direction of an arrow indicates the steepest increase in the variable, and the length indicates the strength relative to other variables. S, sulfur; BD, bulk density; SOM, soil organic matter; WC, moisture. No. 1, 2, 3 represent three replicates of <i>P. australis</i> wetland in spring; No. 4, 5, 6 represent three replicates of <i>P. australis</i> wetland in summer; No. 7, 8, 9 represent three replicates of <i>P. australis</i> wetland in fall; No. 10, 11, 12, 13, 14 represent five replicates of <i>T. chinensis</i> wetland in spring; No. 15, 16, 17, 18, 19 represent five replicates of <i>T. chinensis</i> wetland in summer; No. 20, 21, 22, 23, 24 represent five replicates of <i>T. chinensis</i> wetland in fall; No. 25, 26, 27, 28 represent four replicates of <i>S. salsa</i> wetland in spring; No. 29, 30, 31, 32 represent four replicates of <i>S. salsa</i> wetland in summer; No. 33, 34, 35, 36 represent four replicates of <i>S. salsa</i> wetland in fall.</p
Ecological characteristics of three sampling sites in different sampling seasons.
<p>Note: Spring = April; Summer = August; Fall = November.</p><p>Ecological characteristics of three sampling sites in different sampling seasons.</p