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Effect of individual grass species and grass species mixtures on soil quality as related to root biomass and grass yield Organic Eprints
Eekeren, Nick J.M.; Bos, Merijn M.; Wit, J. de; Keidel, H.; Bloem, J..
For the purpose of feeding value, drought resistance and nitrogen utilization, other grasses (e.g. Festuca arundinacea and Dactylis glomerata) than the currently widely used perennial rye grass (Lolium perenne) are introduced in dairy farming, either as a monoculture or in a mixture. To study the effect of these grasses on yield and soil chemical and biological quality, the three species were sown in a field experiment in monoculture and in two mixtures.Within two growing seasons, the grass species tested under high soil fertility conditions did not show significant effects on most of the tested soil biological parameters. Only for the mixture of L. perenne and D. glomerata a higher soil NO3− and mineral N content were most probably related to a higher...
Tipo: Journal paper Palavras-chave: Pasture and forage crops; Crop combinations and interactions.
Ano: 2010
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Short-terme changes in the spatial distribution of microorganisms in soil aggregates as affected by glucose addition Inra
Chenu, C.; Hassink, J.; Bloem, J..
We studied the location of microorganisms in soil aggregates by low temperature scanning electron microscopy and by confocal laser microscopy (direct counts of bacteria) on dissected aggregates. We compared a sandy and a clayey soil and studied the effect of adding glucose on the spatial distribution of microorganisms. In the sandy soil, pores with diameters between 6 µm and 30 µm were the most abundant. In the clayey soil, the pores were <0.2 µm in diameter. In the sandy soil, microorganisms were present both on the surface and inside aggregates, whereas they were concentrated on the surface of clayey soil aggregates. Glucose addition increased the amount of bacteria and fungi on the surface of clayey soil aggregates but not inside them. For the sandy...
Tipo: Journal Article Palavras-chave: SCIENCES DU SOL; MICROORGANISME DU SOL; AGREGAT DU SOL; GLUCOSE; MICROSCOPIE ELECTRONIQUE; SOL SABLEUX; CHAMPIGNON DU SOL; TYPE DE SOL; SOL ARGILEUX.
Ano: 2001 URL: http://www.prodinra.inra.fr/prodinra/pinra/doc.xsp?id=PUB0200030081092060&uri=/notices/prodinra1/2010/12/
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