| Abstract | U vegetaciji soje 2018. godine provedena su istraživanja na različitim međurednim razmacima od 12,5, 25, 50 i 70 cm. Uz promatranje usjeva su se uzimali i analizirali uzorci biljaka od 6. do 9. mjeseca 2018. godine te pred samu žetvu. Posijana je sorta soje „Ika“, Poljoprivrednog instituta u Osijeku. Obavljena je zaštita soje protiv korova, nakon samog nicanja soje, za suzbijanje jednogodišnjih širokolisnih i nekih jednogodišnjih trava. U usjevu nije uočen niti jedan napad štetnika koji bi zahtijevao primjenu kemijskih sredstava. Na početku svakog mjeseca od 6. do 9. mjeseca su se uzimali uzorci (po 20 biljaka) iz svakog pokusa kako bi se odredila visina biljke (cm biljci-1), svježa masa biljke (g biljci-1) te masa suhe tvari (g biljci-1). Žetva je obavljena 11. listopada 2018. godine. Vlažnost zrna pri žetvi bila je 15%. Najveći porast stabljike, mase svježe tvari i suhe tvari biljaka soje utvrđen je od 1. srpnja do 1. kolovoza 2018. godine. U tom razdoblju je prosječno povećanje stabljike iznosilo 48,8 cm po biljci, odnosno 1,6 cm po biljci po danu. Najvišu stabljiku soja je imala na početku rujna kod međurednog razmaka sjetve 50 cm što je iznosilo 119,7 cm biljci-1, odnosno 13,9% više od prosjeka pokusa (103,1 cm). Svježa masa biljke za sve međuredne razmake prosječno je iznosila 159,25 g biljci-1 na početku rujna, dok je u tom razdoblju masa suhe tvari iznosila prosječno 53,98 g biljci-1. U rujnu, najveću suhu masu biljke imala je soja u međurednom razmaku 25 cm, što je prosječno iznosilo 62,07 g biljci-1. Najveći prinos sjemena soje po biljci je bio kod biljaka međurednog razmaka 70 cm (19,79 g biljci-1 ), a najmanji kod biljaka međurednog razmaka 12,5 cm (8,65 g biljci-1). U konačnici, prosječan prinos sjemena iznosio je 1, 51 t ha-1, s tim da je prinos sjemena po jedinici površine bio najveći kod međurednog razmaka od 25 cm (prosječno 1,90 biljci-1), što je u odnosu na ostale postignute prinose bilo statistički značajno na razini p<0,05. |
| Abstract (english) | In 2018 soybean vegetation, the fiels experiment was set up at different row spacing of 12.5, 25, 50 and 70 cm. Soybean plant samples were taken and analyzed from June to September of 2018 and before the harvest itself. The previus crop was maize. Soybean genotype "Ika", Agricultural Institute in Osijek, was sown in April. The protection of soybeans against weeds was done after the emergence of soybeans. There were no pest attack. At the beginning of each month (June-September), samples (20 plants each) were taken from each row spacing, in order to determine plant height (cm plant-1), fresh plant mass (g plant-1), and dry matter weight (g plant-1). The harvest was done on October 11, 2018, in 3 repetitions. The grain moisture at harvest was 15%. The largest increase in stem, mass of fresh matter, and dry matter of soybean plants was determined from June 1 to September 1, 2018. During this period, the average stem increment was 48.8 cm per plant, or 1.6 cm per plant per day. The highest soybean stem at 50 cm row spacing, at the beginning of September was on average 119.7 cm in plant-1, or 13.9% more than the average of the experiment (103.1 cm). The fresh mass of the plant for all row spacing averaged 159.25 g of plant-1 at the beginning of September, while during that period the dry matter weight averaged 53.98 g of plant-1. In September, the highest dry mass per plant was at 25 cm row spacing, which averaged 62.07 g of plant-1. The highest soybean seed yield per plant was 70 cm (19.79 g plant-1) with row spacing and 12.5 cm (8.65 g plant-1) row-spacing. Generally, the average seed yield was 1.51 t ha-1, with the seed yield per unit area being the highest at a row spacing of 25 cm (average 1.90 t ha-1), which is compared to other yields were statistically significant at the p <0.05 level. |
