ALBERT — All Library Books, journals and Electronic Records Telegrafenberg

Treffer pro Seite

Treffer 1 - 3 | 3 Treffer

Sortierung

Unbekannt

Aboveground plant biomass from the Jena Experiment (Monocultures, year 2004) (2016)

Roscher, Christiane ; Schulze, Ernst-Detlef ; Weisser, Wolfgang W

PANGAEA

zur Merkliste hinzufügen auf der Merkliste

Details

Publikationsdatum: 2023-06-24

Beschreibung: This data set contains aboveground plant biomass in 2004 (Sown plant community, Weed plant community, Dead plant material, and Unidentified plant material; all measured in biomass as dry weight) of the monoculture plots of a large grassland biodiversity experiment (the Jena Experiment). In the monoculture plots the biomass of the sown plant community contains only a single species per plot and this species is a different one for each plot. Which species has been sown in which plot is stated in the plot information table for monocultures (see further details below). The monoculture plots of 3.5 x 3.5 m were established for all of the 60 plant species of the Jena Experiment species pool with two replicates per species. These 60 species comprising the species pool of the Jena Experiment belong to four functional groups (grasses, legumes, tall and small herbs). Plots were sown in May 2002 and are since maintained by bi-annual weeding and mowing. Aboveground plant biomass was harvested twice in 2004 just prior to mowing (during peak standing biomass in early June and in late August) on all experimental plots of the monocultures. This was done by clipping the vegetation at 3 cm above ground in 2 rectangles of 0.2 x 0.5 m per plot. The location of these rectangles was assigned prior to each harvest by random selection of coordinates within the core area of the plots (i.e. excluding an outer edge of 0.5 m). The positions of the rectangles within plots were identical for all plots. The harvested biomass was sorted into categories: sown plant species, weed plant species (species not sown at the particular plot), detached dead plant material (i.e., dead plant material in the data file), and remaining plant material that could not be assigned to any category (i.e., unidentified plant material in the data file). All biomass was dried to constant weight (70°C, 〉= 48 h) and weighed. The data for individual subsamples (i.e. rectangles) and the mean over samples for all biomass measures are given.

Schlagwort(e): Date/time end; Date/time start; Dead plant material, biomass as dry weight; EXP; Experiment; Experimental plot; HEIGHT above ground; Height aboveground, maximum; Height aboveground, minimum; Jena Experiment 2004; JenExp; JenExp_2004; Replicate; Sown plant community, biomass as dry weight; The Jena Experiment; Thuringia, Germany; Unidentified plant material, biomass as dry weight; Weeds plant community, biomass as dry weight

Materialart: Dataset

Format: text/tab-separated-values, 7142 data points

Permalink

	Standort	Signatur	Erwartet	Verfügbarkeit

Andere fanden auch interessant ...

DATEN PANGAEA

S·F·X

Volltext

Unbekannt

Carbon and nitrogen concentrations in plants (Main Experiment, year 2004) (2018)

Temperton, Vicky ; Schulze, Ernst-Detlef

PANGAEA

zur Merkliste hinzufügen auf der Merkliste

Details

Publikationsdatum: 2024-06-13

Beschreibung: This data set contains measurements of carbon and nitrogen concentrations in aboveground plant biomass. Data presented here is from the Main Experiment plots of a large grassland biodiversity experiment (the Jena Experiment; see further details below). In the main experiment, 82 grassland plots of 20 x 20 m were established from a pool of 60 species belonging to four functional groups (grasses, legumes, tall and small herbs). In May 2002, varying numbers of plant species from this species pool were sown into the plots to create a gradient of plant species richness (1, 2, 4, 8, 16 and 60 species) and functional richness (1, 2, 3, 4 functional groups). Plots were maintained in general by bi-annual weeding and mowing. Since 2010, plot size was reduced to 5 x 6 m and plots were weeded three times per year. Aboveground plant biomass was harvested twice in May and August at estimated peak standing biomass before mowing. Plants were clipped at 3 cm above ground level in four rectangles of 20 x 50 cm size per plot. All material was sorted to species, weeds and rest (dead). Samples were dried at 70 °C for at least 48 h and weeds and rest were thrown away. All other material from one plot was combined to one sample and cut up with an analysis mill (Kinematica, Littau, Schweiz). The cut material was milled to fine powder in a ball-mill (Cyclotec 1093 Sample Mill, Foss Tecator, Hoganas, Sweden). From the milled material appr. 20 mg were weighed in for CN analysis. Carbon and nitrogen concentrations of this subsample were then determined with an elemental analyzer (vario EL element alalyser).

Schlagwort(e): Carbon; Date/time end; Date/time start; EXP; Experiment; Experimental plot; HEIGHT above ground; Height aboveground, maximum; Height aboveground, minimum; Jena Experiment 2004; JenExp; JenExp_2004; Nitrogen, total; The Jena Experiment; Thuringia, Germany; Treatment: aboveground: pesticide; Treatment: below pesticide; Treatment: drought; Treatment: eartworm exclosure; Treatment: fertilizing; Treatment: molluscide; Treatment: mowing; Treatment: nematicide; Treatment: phytometers; Treatment: seed addition; Treatment: special; Treatment: weeding; Treatment: weeding history

Materialart: Dataset

Format: text/tab-separated-values, 3280 data points

Permalink