Effect of presowing treatments of fruits on germination of New Zealand spinach

Čvrsta ovojnica suhog ploda novozelandskog špinata otežava procese bubrenja i klijanja klica sjemenki, pa je nicanje u poljskim uvjetima sporo i nejednolično. U cilju povećanja klijavosti novozelandskog špinata, istražen je utjecaj skarifikacije plodova sumpornom kiselinom i namakanja u destiliranoj vodi, maceratu kamilice te otopinama giberelinske kiseline, kalijevog nitrata i preparata 'EkoBooster 1'. Pokus je postavljen prema metodi slučajnog bloknog rasporeda u tri ponavljanja u klima komori u kontroliranim uvjetima rasta. Skarifikacija nije imala pozitivan učinak na energiju klijanja niti na ukupnu klijavost. Opravdano najveću ukupnu klijavost pokazali su tretmani kalijevim nitratom (36,4 %), giberelinskom kiselinom (28,1 %) i kamilicom (28,0 %). Relativno najveću, identičnu ukupnu klijavost, imale su kombinacije kalijevog nitrata sa i bez skarifikacije (36,4 %). S manjom ukupnom klijavosti slijede kombinacije neskarificirano×kamilica (32,3 %) i neskarificirano ×giberelinska kiselina (30,2 %). Tri kombinacije s utvrđenom najvećom ukupnom klijavosti nisu pokazale opravdanost u nicanju novozelandskog špinata u poljskim uvjetima u odnosu na netretirane plodove.Firm involucre of the dry fruit of New Zealand Spinach hinders the processes of swelling and germination of seeds, therefore the germination in field conditions is slow and uneven. With the purpose of increasing the germination, the effect of scarification with sulfuric acid and treatments with distilled water, chamomile extract and solutions of gibberellic acid, potassium nitrate and commercial product ‘EkoBooster 1’ on germination was researched. The experiment was set according to the random block design in three repetitions, in climate chamber under controlled conditions of growth. Scarification had not positive effect either on germination energy or total germination. Treatments with potassium nitrate (36.4%), gibberellic acid (28.1%) and chamomile macerate (28.0%) showed the highest total germination. Relatively largest, identical total germination was recorded at combinations of potassium nitrate with or without scarification (36.4%), followed by combinations of chamomile and gibberellic acid without scarification (32.3 and 30.2%). Three combinations with proven highest total germination in the climate chamber did not significantly affect germination of the New Zealand Spinach in the field conditions regarding untreated fruits