Limits...
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.


Related in: MedlinePlus

Proportion of standing litter based on total biomass found in the canopy profiles shortly before the harvest in July 2009 depending on experimental factors. The boxes show the median and first and third quartiles. For abbreviations of treatments, refer to Table 1. Asterisks denote significant differences of factor levels compared with the reference level (sward control, utilization 1/year, fertilization x) in a GLM with negative binomial error distribution (link: logit). **P < 0.01, *P < 0.05.
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PLV089F2: Proportion of standing litter based on total biomass found in the canopy profiles shortly before the harvest in July 2009 depending on experimental factors. The boxes show the median and first and third quartiles. For abbreviations of treatments, refer to Table 1. Asterisks denote significant differences of factor levels compared with the reference level (sward control, utilization 1/year, fertilization x) in a GLM with negative binomial error distribution (link: logit). **P < 0.01, *P < 0.05.

Mentions: The amount of standing litter within the vegetation (Fig. 2) mainly depended on age and nutrient status of the plots. The high cutting frequency with an early first cut (plots belonging to the three-cut regime) and fertilization significantly decreased the ratio of dead to green plant material. However, the amount of grasses present in the vegetation also tended to influence the amount of litter (analysis of deviance of a linear model with negative binomial error distribution P = 0.07). The –Mon-swards, containing the least grasses also had the lowest amounts of standing litter.Figure 2.


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)

Proportion of standing litter based on total biomass found in the canopy profiles shortly before the harvest in July 2009 depending on experimental factors. The boxes show the median and first and third quartiles. For abbreviations of treatments, refer to Table 1. Asterisks denote significant differences of factor levels compared with the reference level (sward control, utilization 1/year, fertilization x) in a GLM with negative binomial error distribution (link: logit). **P < 0.01, *P < 0.05.
© Copyright Policy - creative-commons
Related In: Results  -  Collection

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

PLV089F2: Proportion of standing litter based on total biomass found in the canopy profiles shortly before the harvest in July 2009 depending on experimental factors. The boxes show the median and first and third quartiles. For abbreviations of treatments, refer to Table 1. Asterisks denote significant differences of factor levels compared with the reference level (sward control, utilization 1/year, fertilization x) in a GLM with negative binomial error distribution (link: logit). **P < 0.01, *P < 0.05.
Mentions: The amount of standing litter within the vegetation (Fig. 2) mainly depended on age and nutrient status of the plots. The high cutting frequency with an early first cut (plots belonging to the three-cut regime) and fertilization significantly decreased the ratio of dead to green plant material. However, the amount of grasses present in the vegetation also tended to influence the amount of litter (analysis of deviance of a linear model with negative binomial error distribution P = 0.07). The –Mon-swards, containing the least grasses also had the lowest amounts of standing litter.Figure 2.

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