Sjemenarstvo, Vol. 29 No. 3-4, 2012.
Izvorni znanstveni članak
EFFECT OF GROWTH REGULATOR AND NITROGEN FERTILIZATION ON SEED YIELD AND GERMINATION OF ITALIAN RYEGRASS
Martina Kovačević
orcid.org/0000-0003-2576-4982
; Sveučilište u Zagrebu Agronomski fakultet
Zlatko Svečnjak
orcid.org/0000-0001-5110-3921
; Sveučilište u Zagrebu Agronomski fakultet
Krešimir Bošnjak
; Sveučilište u Zagrebu Agronomski fakultet
Dario Jareš
; Sveučilište u Zagrebu Agronomski fakultet
Sažetak
Limited information is available for agricultural practices and operations in seed
production of Italian ryegrass (Lolium multiflorum Lam.). The main objective was to
determine the effect of plant growth regulator and nitrogen fertilization on the most
important agronomic traits of Italian ryegrass grown for seed production. Field trial was
carried out during one growing season with four nitrogen fertilization (0, 60, 120 and
180 kg/ha) along with unfertilized plots. Plant growth regulator Moddus 250 EC was
applied during shooting at the rate of 1.0 L/ha. Seed yields averaged 1.652 kg/ha with
average seed water content of 40.5%. Compared to untreated plots, the application of
plant growth regulator reduced stem height, and consequently, increased seed yields.
Nitrogen fertilization produced significantly higher seed yields primarily due to
increased spike number and secondarily because of significantly higher 1000-seed
weight and slightly improved floret number per spikelet. Seed yields following nitrogen
fertilization rate of 120 and 180 kg/ha were slightly larger than those produced with 60
kg/ha. Nitrogen fertilization and plant growth regulator had no effect on final
germination rate, but seed viability was higher for heavier seeds.
Ključne riječi
Italian ryegrass; plant growth regulator; N fertilization; seed yield; germination
Hrčak ID:
103348
URI
Datum izdavanja:
28.3.2013.
Posjeta: 1.436 *