mountains

Bijeenkomst: EGF2015
Auteur: Pleșa A., Rotar I., Păcurar F., Vidican R., Balázsi A. and Stoian V.
ISBN: 978-9090-289-61-8
Jaar van uitgifte: 2015
Producttype: Paper
Semi-natural grassland in the Central area of Apuseni Mountains, Romania is fertilized only with organic fertilizers. Manure from cows and horses is applied in quantities of 6 to 10 Mg ha‑1. There has been a recent tendency for intensification of grassland close to human settlements and a decline or even abandonment of that located further away. An experiment with four variants was established in order to follow the effect of enhanced inputs of manure on Festuca rubra L. grassland, in terms of productivity, quality and biodiversity, as well as to recommend the optimum quantity of fertilizer. Production increased with increasing amounts of manure, but the quality of fodder did not show the same trend. The cover of Centaurea phrygia C. A. Mey and Pimpinella major L. increased in the treatments with large amounts of manure and these species contributed to significant reductions in fodder quality.

Bijeenkomst: EGF2015
Auteur: Rotar I., Păcurar F., Vidican R., Mălinaș A. and Gliga A.
ISBN: 978-9090-289-61-8
Jaar van uitgifte: 2015
Producttype: Paper
As seen in other studies conducted over time, mineral fertilization provides an opportunity to improve grassland productivity and fodder quality. The aim of our research is to follow the effect of large amounts of mineral fertilizers on mountain grassland systems (for conditions specific to Apuseni Mountains, Romania) as well as to evaluate if increasing the quantity and quality of sward fodder value is applicable for the highly diverse grassland specific to Apuseni Mountains. The findings come from an experiment with 4 treatments (T1 = control (unfertilized), T2 = N50P25K25, T3 = N100P50K50, and T4 = N150P75K75). Mineral fertilization is directly proportional to dry matter (DM) harvested, which reaches up to 5.38 Mg ha‑1 DM. As a result, radical floristic changes occurred, Festuca rubra L. grassland type evolved into a Festuca rubra L. – Trisetum flavescens L. grassland, then into Agrostis capillaris L. – Trisetum flavescens L. grassland and then into one of Agrostis capillaris L. grassland type. The high inputs did not result in significant yield increases, but led to the disappearance of Festuca rubra L. grassland type and hence its specific diversity. Some nitrophilic species were better installed compared to oligomesotrophic species or oligotrophic species.