Secondary succession of spontaneous flora after deforestation and self-reforestation

Abstract

The experimental plots are located on a farm in a mountainous area at an altitude of 845 m above the sea level with the soil type cambisol. After leaving pasture grassland in about 50 years created a forest community with 45.06 per cent share of woody plants. After it has been deforested was doing research on a variant grazing with Charolais cattle and compared with deforested grassland without management leaving the development without human intervention. On the variant without management for three years we recorded 58 plant species with woody plants. Cover of grasses was reduced, for example Agrostis capillaris L. from 15 to 0.78% and Festuca rubra from 5,33 to the tracks, like the presence of herbs, on the contrary increased the percentage of woody plants as Betula pendula from 4.08 to 13.52%, Cerasus avium from 3.07 to 16 28% and Populus tremula from 16.22 to 47.88%. Proportion of woody plants in the third year of research accounted for up to 77.68 per cent stake. Dominant Populus tremula amounted to 2.50 m high and mean diameter 30 mm. Grazing control variant for three years consisted of community - Agrostis Festucetum rubrae with 66 plant species and dominance of other herbs (53.66%). Significantly increased the proportion of grasses, for example Agrostis capillaris from 5.67 to 15.61%, Festuca rubra from 5.02 to 8.42%, Festuca pratensis from 3.84 to 4.40% and Dactylis glomerata from 2.46 to 4.46%. The variant without management significantly increased levels of C : N at depths of 0-200mm from 10.88-12.65 to 14-16.53, compared with a variant of grazing (from 9.36-12.41 to 6.93-10.46). The evaluation of phosphorus and potassium in two depths, in the C : N ratio, but also in botanical composition from 2006 to 2008, we found statistically highly significant differences in the variant with self-reforestation without management (BM) compared with grazing control variant after deforestation.