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Relationship between soil chemical factors and grassland diversity

Janssens, F. (Universite Catholique de Louvain, Louvain-la-Neuve (Belgium). Lab. d'Ecologie des Prairies) ; Peeters, A ; Tallowin, J.R.B ; Bakker, J.P ; Bekker, R.M ; Fillat, F ; Oomes, M.J.M

Plant and soil, 1998-05, Vol.202 (1), p.69-78 [Periódico revisado por pares]

Dordrecht: Kluwer Academic Publishers

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Título:
Relationship between soil chemical factors and grassland diversity
Autor: Janssens, F. (Universite Catholique de Louvain, Louvain-la-Neuve (Belgium). Lab. d'Ecologie des Prairies) ; Peeters, A ; Tallowin, J.R.B ; Bakker, J.P ; Bekker, R.M ; Fillat, F ; Oomes, M.J.M
Assuntos: Acid soils ; Agricultural soils ; Animal and plant ecology ; Animal, plant and microbial ecology ; BIODIVERSITY ; Biological and medical sciences ; ECOSYSTEMS ; Fundamental and applied biological sciences. Psychology ; Grassland management ; GRASSLAND SOILS ; Instituut voor Agrobiologisch en Bodemvruchtbaarheidsonderzoek ; NITROGEN ; NUTRIENT NUTRIENT INTERACTIONS ; Organic soils ; PHOSPHORUS ; POTASSIUM ; Research Institute for Agrobiology and Soil Fertility ; Soil air ; SOIL CHEMISTRY ; Soil nutrients ; Soil organic matter ; Synecology ; Terrestrial ecosystems
É parte de: Plant and soil, 1998-05, Vol.202 (1), p.69-78
Notas: P33
1998006471
F40
ObjectType-Article-2
SourceType-Scholarly Journals-1
ObjectType-Feature-1
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Descrição: Many studies carried out during these last few years have focused on the factors influencing plant diversity in species-rich grasslands. This is due to the fact that these ecosystems, among the most diversified in temperate climates, are extremely threatened; in some areas, they have almost disappeared. The re-establishment of these habitats implies to know the living conditions of the associations to be recreated. Very often, the typical species of these communities have become so rarefied that the seed bank or the seed rain are not sufficient to recreate the plant community. Most of the time, to achieve the restoration of these communities, they have to be totally recreated by sowing. For the restoration or the maintenance of the community, the soil chemical characteristics have also to be appropriate or if not modified. This research tends to establish a relation between some soil chemical factors and the plant diversity of a great number of stations. This research has illuminated the relationship between soil extractable phosphorus and potassium and plant diversity. Over 5 mg of phosphorus per 100 g of dry soil (acetate + EDTA extraction), no station containing more than 20 species per 100 m² has been found. The highest number of species is found below the optimum content of the soil for plant nutrition (5-8 mg P/100 g). Concerning the potassium, the highest number of species is found at 20 mg/100, a value corresponcing to an optimum content of the soil for plant nutrition. High potassium contents, in opposition to phosphorus contents, are thus compatible with high values of diversity. Other factors (i.e. pH, organic matter, total nitrogen and calcium) do not show so clearly a relation with plant diversity. Excess of N-NO₃ is known for its negative effect on the diversity of plant communities. In these environments, apart from the atmospheric deposits which can be important in some areas, N-NO₃ is derived mainly from the symbiotic fixation of atmospheric nitrogen by legumes as well as from the mineralization of the organic matter of the soil. It is possible that, when in small quantities, the available soil phosphorus could be a limiting factor of the N-NO₃ supply by these two sources. In this hypothesis, nitrogen would remain the main element limitating plant diversity but its availability would be controlled by phosphorus.
Editor: Dordrecht: Kluwer Academic Publishers
Idioma: Inglês

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Relationship between soil chemical factors and grassland diversity

Janssens, F. (Universite Catholique de Louvain, Louvain-la-Neuve (Belgium). Lab. d'Ecologie des Prairies) ; Peeters, A ; Tallowin, J.R.B ; Bakker, J.P ; Bekker, R.M ; Fillat, F ; Oomes, M.J.M

Dordrecht: Kluwer Academic Publishers

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