Izvorni znanstveni članak
SELF-THINNING, FEMALE/MALE PLANTS RATIO AND MORPHOLOGICAL TRAITS OF INDUSTRIAL HEMP DEPENDING ON SOWING DENSITY AND NITROGEN FERTILIZATION
Zvjezdana Augustinović
; Visoko gospodarsko učilište Križevci, Križevci, Hrvatska
Milan Pospišil
; Agronomski fakultet Sveučilišta u Zagrebu, Zagreb, Hrvatska
Jasminka Butorac
; Agronomski fakultet Sveučilišta u Zagrebu, Zagreb, Hrvatska
Marcela Andreata Koren
; Visoko gospodarsko učilište Križevci, Križevci, Hrvatska
Marijana Ivanek-Martinčić
; Visoko gospodarsko učilište Križevci, Križevci, Hrvatska
Nikolina Šumbera
; Visoko gospodarsko učilište Križevci, Križevci, Hrvatska
Sažetak
The goal of the investigation carried out at College of Agriculture at Križevci experimental field during 2003-2005 was to determine the impact of plant density and nitrogen fertilization on self-thinning, female/male plant ratio and morphological traits of industrial hemp grown primarily for fibre. The Hungarian cultivar Kompolti was used in the experiment. Three different sowing densities (100, 200 and 300 viable seeds/m2) and four nitrogen rates (0, 60, 120 and 180 kg N/ha) were investigated in the experiment. The experiment was set up according to split-block method in five replications. Sowing densities, nitrogen rates and their interactions had a significant influence on all investigated traits in all three years. Increasing sowing density and amount of nitrogen fertilization significantly increased the number of plant mortalities in the crop. The hemp established larger proportion of female compared to male plants (57:43; 61:39; 57:43) in all three years. Proportion of female plants in the crop increased with increasing sowing density and amount of nitrogen fertilization. Sowing density, nitrogen fertilization and their interactions significantly influenced all investigated morphological traits. Higher sowing density (200 and 300 germinated seeds/m2) and fertilization with smaller amounts of nitrogen (max 60 kg/ha) are suitable for hemp cultivation for fiber because they result in optimal stem thickness and satisfactory height, technical length and internode length.
Ključne riječi
industrial hemp; sowing densities; nitrogen fertilization; self-thinning; female/male ratio; morphological traits
Hrčak ID:
97746
URI
Datum izdavanja:
19.12.2012.
Posjeta: 1.635 *