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Nitrogen addition and harvest frequency rather than initial plant species composition determine vertical structure and light interception in grasslands.

Petersen U, Isselstein J - AoB Plants (2015)

Bottom Line: In biodiversity experiments based on seeded experimental communities, species richness and species composition exert a strong influence on canopy structure and can lead to an improved use of aboveground resources.However, the allocation of biomass in response to cutting and fertilization differed among the sward types.Management had a much stronger influence on structure and light interception than plant species composition in this grassland experiment.

View Article: PubMed Central - PubMed

Affiliation: Department of Crop Sciences, University of Göttingen, Von-Siebold-Str. 8, D-37075 Göttingen, Germany Present address: Johann Heinrich von Thünen Institute, Federal Research Institute for Rural Areas, Forestry and Fisheries, Institute of Climate-Smart Agriculture (AK), Bundesallee 50, D-38116 Braunschweig, Germany Ute_Petersen@gmx.net.

No MeSH data available.


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Vertical distribution of the different functional fractions of biomass for all 12 experimental treatments (July 2009). Given are means of total biomass, biomass of each fraction per layer and standard deviations of each layer, n = 6. For abbreviations of treatments, refer to Table 1.
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PLV089F1: Vertical distribution of the different functional fractions of biomass for all 12 experimental treatments (July 2009). Given are means of total biomass, biomass of each fraction per layer and standard deviations of each layer, n = 6. For abbreviations of treatments, refer to Table 1.

Mentions: Total biomass of the July canopy profiles belonging to the same management regime did not differ among the sward types (means and standard deviations displayed in Fig. 1). Likewise, species richness had no effect on biomass when included as first experimental factor in a GLS with different variances per fertilization level. However, the two manipulated sward types gained significantly more biomass from fertilization than the Co-swards (interaction sward × nutrients, t(51, α) = 2.051, P = 0.045 for –Dic and t(51, α) = 2.345, P = 0.023 for –Mon-swards, respectively, GLS allowing for different variance in each cut × nutrient combination). Averaged across all management treatments, the –Mon-swards had produced the least biomass (t(51, α) = 2.49, P = 0.015).Figure 1.


Nitrogen addition and harvest frequency rather than initial plant species composition determine vertical structure and light interception in grasslands.

Petersen U, Isselstein J - AoB Plants (2015)

Vertical distribution of the different functional fractions of biomass for all 12 experimental treatments (July 2009). Given are means of total biomass, biomass of each fraction per layer and standard deviations of each layer, n = 6. For abbreviations of treatments, refer to Table 1.
© Copyright Policy - creative-commons
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4584960&req=5

PLV089F1: Vertical distribution of the different functional fractions of biomass for all 12 experimental treatments (July 2009). Given are means of total biomass, biomass of each fraction per layer and standard deviations of each layer, n = 6. For abbreviations of treatments, refer to Table 1.
Mentions: Total biomass of the July canopy profiles belonging to the same management regime did not differ among the sward types (means and standard deviations displayed in Fig. 1). Likewise, species richness had no effect on biomass when included as first experimental factor in a GLS with different variances per fertilization level. However, the two manipulated sward types gained significantly more biomass from fertilization than the Co-swards (interaction sward × nutrients, t(51, α) = 2.051, P = 0.045 for –Dic and t(51, α) = 2.345, P = 0.023 for –Mon-swards, respectively, GLS allowing for different variance in each cut × nutrient combination). Averaged across all management treatments, the –Mon-swards had produced the least biomass (t(51, α) = 2.49, P = 0.015).Figure 1.

Bottom Line: In biodiversity experiments based on seeded experimental communities, species richness and species composition exert a strong influence on canopy structure and can lead to an improved use of aboveground resources.However, the allocation of biomass in response to cutting and fertilization differed among the sward types.Management had a much stronger influence on structure and light interception than plant species composition in this grassland experiment.

View Article: PubMed Central - PubMed

Affiliation: Department of Crop Sciences, University of Göttingen, Von-Siebold-Str. 8, D-37075 Göttingen, Germany Present address: Johann Heinrich von Thünen Institute, Federal Research Institute for Rural Areas, Forestry and Fisheries, Institute of Climate-Smart Agriculture (AK), Bundesallee 50, D-38116 Braunschweig, Germany Ute_Petersen@gmx.net.

No MeSH data available.


Related in: MedlinePlus