Influence of seeding density on seed and oil yield, and fatty acid composition of white mustard (Sinapis alba L.) | Vpliv gostote setve na pridelek semena in olja ter sestavo maščobnih kislin pri beli gorjušici (Sinapis alba L.)

English. The aim of this study was to determine the effects of seeding density on the seed yield of white mustard, the oil yield and fatty acid composition under the agroecological conditions of the northwestern Republic of Croatia. The field trials were conducted at the experimental station of the Faculty of Agriculture, University of Zagreb (45° 48’ N, 16° 05’ E) during two growing seasons. The trial included four seeding densities of white mustard: 50, 70, 90 and 110 germinable seeds m-2. The trial was set up using a randomized block design with five replications. The highest seed yield was obtained with a seeding density of 110 germinable seeds m-2, with no significant differences between seeding rates of 70 and 90 germinable seeds m-2. The average oil content during researched years varied from 23.97 % in the seeding density of 50 germinable seeds m-2 to 24.37 % in the seeding density of 90 germinable seeds m-2. The higher oil yield was achieved in 2014 due to the higher oil content in the seed that year. Regarding fatty acid composition, erucic acid was dominant along with oleic acid, linoleic acid, and linolenic acid.

Slovenian. Namen raziskave je bil določiti vpliv gostote setve na pridelk olja in semena ter sestavo maščobnih kislin bele gorjušice v agroekoloških razmerah severozahodne Hrvaške. Poljski poskus je potekal na poskusni postaji Agronomske fakultete Univerze v Zagrebu (45° 48’ N, 16° 05’ E) v dveh rastnih sezonah. Poskus je obsegal štiri gostote semen bele gorjušice in sicer 50, 70, 90 in 110 kaljivih semen m-2. Poskus je bilo zasnovan kot naključni bločni poskus s petimi ponovitvami. Največji pridelek semen je bil dosežen z gostoto setve 110 kaljivih semen m-2, vendar brez značilnih razlik z gostotama setve 70 in 90 kaljivih semen m-2. Poprečna vsebnost olja je v letih poskusa variirala od 23,97 % pri gostoti setve 50 kaljivih semen m-2 do 24,37 % pri gostoti setve 90 kaljivih semen m-2. Največja vsebnost olja je bila dosežena v letu 2014 zaradi nasplošno največje vsebnosti olja v tem letu. Glede sestave maščobnih kislin je bila dominantna erucična kislina, ki so ji sledile oleinska, linoleična in linolenska kislina.