Abstract
Mulching of grasslands was suggested by many that could be a feasible solution for the low productive systems to maintain their natural productivity and floristical diversity, when succesion of woody species is a threatening factor. In this middle-term experiment, we aimed to study the effects of new alternatives in Apuseni Mountains, like mulching and mulching with mineral fertilization, on the floristic structure of the oligotrophic grasslands. The experiment has started in 2009 and we followed the effects of the treatments in the 6 th year. The experiment design contains seven variants in five repetitions (randomized blocks) of mowing, mulching and mulching with different doses of fertilizers applied in different time. After six years, the treatments determined no changes in the main grassland type, but significant changes have taken place in the floristic compositions of the variants. The overall effects of the treatments are negative upon the phytodiversity in some of the variants. From this reason these has to be carefully recommended if there are conservational purposes.
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