Leaf Area and Productivity in Grasslands

Geyger, E.

doi:10.1007/978-94-010-1315-4_11

Cited by 7 publications

(2 citation statements)

References 11 publications

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“…The different light extinction coefficients of the sward types were obviously due to differences in leaf angles. Light extinction is influenced by the vegetation's density but mainly by the angles of leaves with grassy vegetation having a lower extinction coefficient (0.3 < k < 0.7) than vegetation containing a higher percentage of dicots ( k > 1.0, Geyger 1977 ). Fertilization and a late cut increased leaf size and biomass density, visible by a stronger light interception in upper canopy layers in –Mon-swards.…”

Section: Discussionmentioning

confidence: 99%

“…2000 ), where I = PPFD at the ground level and I 0 = PPFD above the canopy measured by the reference sensor. The extinction coefficient k does not only describe how readily the incoming light is intercepted (= absorbed or reflected back); it also gives a hint to the distribution of leaf angles within the canopy ( Geyger 1977 ). The more vertically orientated the leaf blades are, the lower is their extinction coefficient and vice versa.…”

Section: Methodsmentioning

confidence: 99%

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

Petersen

Isselstein

2015

AoB PLANTS

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Recent biodiversity experiments using sown plant communities suggest a positive effect of plant species diversity on ecosystem functioning and resource use. However, are these experimental results applicable to agriculturally managed grassland? We analysed vegetation structure and light interception in managed grassland in which species composition had been manipulated by herbicides. We expected the functionally more diverse plots (grasses and forbs in equal amounts) to better intercept the light than plots containing more than 90% grasses due to an optimal arrangement of leaves in space. However, management (fertilization and mowing regime) had a much stronger influence on structure and light interception than plant species composition.

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Section: Discussionmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

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

Petersen

Isselstein

2015

AoB PLANTS

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Agricultural Grassland on Mesic to Wet Soils

Leuschner

Ellenberg

2017

Ecology of Central European Non-Forest Vegetation: Coastal to Alpine, Natural to Man-Made Habitats

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Types of phytomass ? and leaf area index profiles in grassland vegetation

1986

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Various types of grasslands in the Netherlands were catagorized by their structure: phytomass and leaf area were measured in arbitrarily chosen vegetation layers with width intervals of 2.5, 5, 10 or 20 cm, depending on the height of the sward. Data were standardized for fixed width of layers (layer width set), and for equal numbers of layers of varying width (layer number set). Data were clustered by Ward's method as well as ordinated by Principal Components Analysis (PCA). The duster method revealed 6 groups; those of the layer number sets could be contrasted in their vertical built-up of leaf area index (LAI) -and phytomass profiles and could be characterized ecologically. The ordinations confirmed the findings of the cluster analyses. In our data grassland structure varied mainly along a gradient from constant and sufficient to strongly varying soil water supply during the growing season, and a gradient in soil nutrients from rich to poor. Sites with constant water supply appeared more often nutrient-rich and those with a varying water supply more often poor in nutrients.

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Leaf Area and Productivity in Grasslands

Cited by 7 publications

References 11 publications

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

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

Agricultural Grassland on Mesic to Wet Soils

Types of phytomass ? and leaf area index profiles in grassland vegetation

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