Impact of sowing system on corn yield

U ovom radu su prikazani rezultati istraživanja razlika u sklopu i prinosa zrna kukuruza primjenom dva sustava sjetve: standardna sjetva i sjetva u trake, tj. u udvojene redove (engl. twin row). Za standardnu sjetvu koristila se OLT PSK 4 sijačica, a za sjetvu u trake koristila se sijačica MaterMacc Twin Row 2. Istraživanje je obavljeno na pokušalištu Poljoprivrednog fakulteta u Osijeku, nedaleko od mjesta Klisa, tijekom 2017. godine, koja je karakterizirana kao sušna godina. Sjetva je obavljena sa hibridom sjemenske kuće Pioneer iz FAO grupe 480 oznake P9911 na međuredni razmak od 70 cm kod standardne sjetve te na razmak udvojenih redova od 22 cm s međurednim razmakom od 48 cm kod sjetve u trake s hibridom KWS Kamparis. Standardnom sjetvom I hibrida P9911, ostvaren je sklop od 60 350 biljaka ha-1 dok je prinos iznosio 14 851 kg ha-1. Dobiveni prinos u Twin Row sjetvi I je iznosio 13 826 kg ha-1 što je za 7,41 % manje u odnosu na standardnu sjetvu. Kod hibrida Kamparis, standardnom sjetvom I ostvaren je sklop od 61 415 biljaka ha-1, a prinos je iznosio 14 221 kg ha-1. Dobiveni prinos je za 6,62 % manji u odnosu na prinos ostvaren Twin Row sjetvom I. Iz navedenih rezultata vidljivo je da su hibridi P9911 i Kamparis ostvarili veći prinost standardnom sjetvom u odnosu na Twin Row sjetvu.This paper presents the results of study of differences in maize grain yield and set of plants by using two seeding systems: standard seeding and in twin rows. For standard seeding, the OLT PSK 4 seeder was used, and for twin row seeding, the MaterMacc Twin Row 2 seeder was used. Research was carried out at the experimental field of the Agricultural faculty from Osijek, near Klisa during 2017, which was characterized as a dry year. The seeding was conducted with the Pioneer hybrid (FA0 group 480) P9911 at 70 cm spacing between rows at standard seeding and a twin row seeding system using 22 cm spacing between twin rows and 48 cm between main rows with hybrid KWS Kamparis. By standard sowing in hybrid P9911, a set of 60 350 plants/ha was achieved, while the yield was 14 851 kg/ha. The yield obtained in Twin Row sowing I was 13,826 kg ha-1, which is 7.41% less than standard sowing. In the Kamparis hybrid, a standard sowing of I resulted in a set of 61,415 ha-1 plants, and the yield was 14,221 kg ha-1. The obtained yield is 6.62% lower compared to the yield achieved by Twin Row sowing I. From the above results it can be seen that the hybrids P9911 and Kamparis achieved a higher yield by standard sowing compared to Twin Row sowing