Floristico-ecological changes in grassland after zooantrophic treatments
1997
Novak, J.
The original association Lolio-Cynosuretum cristati containing 33 species of submontane character changed to ruderal grassland of Rumicetum obtusifolii association containing 8 species at an altitude of 600 m, which formed after long-term overfertilizing after overfold by higher excrements and an eutrophisation of the original soil environment in which Rumex obtusifolius (30 percent) and Poa trivialis (46 percent) predominated. After applying the selective herbicide SYNLOX-40 at leaf rosette stage and after non-tillage reseeding, Rumex obtusitolius disappeared from the site. Highly competitive nitrophilous Dactylis glomerata mixed with Trifolium repens replaced Rumex obtusifolius. In the first year Poa trivialis and Trifolium repens contributed positively to the density of sods. Over 4 years the diversity of species gradually increased from 5 to 11 species. Dactylis glomerata took out a high amount of NK-nutrients due to 4 cutting systems without following fertilization; the ratio of C:N modified to a more proper ratio. The level of an eutrophisated site changed to the mesoeutrophic nutritive soil regime. Firstly, a young, renovated grass ecosystems was formed, and in the following years species diversity developed, thereby gradually getting into the global homeostasis
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