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Plattformdaten

Übersicht

Detailansicht

Changes in AMF root colonization following N and P additions at 2000m.

For the seedling transplantation experiment conducted in NUMEX plots in Bombuscaro using as a target species Pouteria torta for monitoring during one year the effects of fertilization in a common species. This data set correspond to the initial measurements of the experiment

refers to Cárate-Tandalla, D., Leuschner, C., Homeier, J. (2015). Performance of Seedlings of a Shade-Tolerant Tropical Tree Species after Moderate Addition of N and P - Frontiers in Earth Science. http://dx.doi.org/10.3389/feart.2015.00075

Measurements of gas flux (CO2, CH4, N2O) in canopy soils of NUMEX plots on four dates (Sept/Nov 2011 and Jan/April 2012). Measurements were taken in 3 of the 4 NUMEX blocks at each elevation; treatments measured included C, N, NP and P.

Gas fluxes were measured by incubating intact soil cores.
Gas samples were analyzed on a gas chromatograph with a FID and ECD.
Note that the units for CO2 are mg CO2-C m-2 h-1 (not g CO2-C).

We evaluated the amount of waterstable soil aggregates at the Bombuscaro NUMEX plots. We included various potential soil parameters that are known to have an effect on the aggregation process.

Arbuscular mycorrhizal root colonization (%), colonized root length (cm/cm³) and fine root parameters in response to nutrient additions (N, P and NP) are reported. Samples were taken in October 2010 at the NUMEX plots at 2000m.

Roots were collected at all NUMEX Plots (ECSF) in January 2009, except Ca treatments. 3 subplots were sampled per plot. Roots were stained with Trypan Blue and the percentage of root colonization determined using the line-intersect method.

Analyses if morphological and physiological attributes of seedlings from the two most common species in NUMEX experiment at the three elevations. Changes in this attributes are altered by nutrient availability in this case fertilization might showed specific limitation for N or P.

Fortnightly time series of measured electrical conductivity and pH values in soil solution (30 cm mineral soil depth) at NUMEX San Francisco. The fortnightly time series extends between August 2007 and December 2016. Soil solution was sampled on the 20 NUMEX plots with ceramic suction cups having a pore size of 1 µm installed at 30 cm depth in the mineral soil. On each plot 3 replicates were collected and bulked to one sample per plot. Electrical conductivity and pH values were measured immediately in unfiltered aliquots in the laboratory of the ECSF.

Operational taxonomic units (OTUs) of arbuscular mycorrhizal fungi (AMF) detected in roots sampled at the 2000m NUMEX sites in October 2010.

AMF root colonization of roots extracted from the upper soil layer (5cm) at all NUMEX plots. Roots are stained with Trypan Blue, AMF root colonization is examined by the line-intersect method.

Soil data of NUMEX plots measured in 2013. Percentage of C and N, as well as soil pH were determined.

This dataset lists basic information about the plots of the NUMEX  experiment. 
It contains the coordinates of the center of the plot, a standardized lable of the plot and the treatment of the plot.

Soil aggregation parameters were measured in NUMEX at 1000m in 2013. Water-stable soil aggregates were determined as well as the mean weight diameter of soil based on dry-sieving.