mineral fertilization

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.

Bijeenkomst: EGF2015
Auteur: Vintu V., Samuil C., Saghin G. and Stavarache M.
ISBN: 978-9090-289-61-8
Jaar van uitgifte: 2015
Producttype: Paper
In the mountainous region of Romania about 200,000 ha is covered by grassland, which is mainly dominated by Nardus stricta L. We have studied the influence of mineral fertilization on productivity, canopy composition and forage quality of Nardus stricta L. permanent grassland in the intra-mountainous depression of Vatra Dornei (North-Eastern Carpathians, 820 m.a.s.l.). Fertilisation was applied at rates of N100-200 P100-200 kg ha‑1 in one or several applications. These mineral fertilizer rates resulted in changes in the dominant species of Nardus stricta L. grasslands, by increasing the percentage of Festuca rubra L. and Agrostis capillaris L. Productivity increased by 119-224%, as well as forage quality compared to the unfertilized control.