Abstract:
Biodiversity conservation is essential in the fight against climate change. Nothing can reduce global warming or the
effects of climate change better than healthy ecosystems. And grasslands have a key role in maintaining the balance of
ecosystems because many species live here or are linked to them. The application of organic and mineral fertilizers for
extended period of time has determined a high biodiversity of the investigated grassland. The objective of this study
was to determine the effect of the applied management on the phytodiversity of a Dichanthium ischaemum (L.) Roberty
permanent meadow in the Moldovian forest-steppe. The experience field was organized on a permanent grassland of
Dichanthium ischaemum (L.) Roberty in Andrieşeni locality Iaşi, county framed between the parallels 47°30' 45.2” N
and 27°15' 42.0” E. The experimental factors were represented by the harvesting phenophase with three graduations: a1-
harvesting at plants height of 15-18 cm, a2-harvesting at the ear formation (control), a3-harvesting to full flowering and
fertilization with seven graduations: b1- unfertilized (control), b2- N50P50 kg/ha-1 annually, b3- N75P75 kg/ha-1 annually.
b4- N100P100 kg/ha-1 annually, b5-10 Mg·ha-1 sheep manure annually, b6-20 Mg·ha-1 sheep manure annually and b7- 30
Mg·ha
-1 applied at two years. The study shows that the applied fertilizers influenced the floristic composition, producing
appreciable, quantitative and qualitative changes in the plant cover. The number of species, as well as the variation of
the Shannon diversity index, were largely influenced by the amount of mineral N, the amount of manure, but also by the
climatic conditions of the experimental period.
