The effect of NPK fertilizer use and planting density on the grain yield of maize. [M.Sc. thesis] | Uticaj vremena primene NPK hraniva i gustine setve na prinos kukuruza. Magistarski rad
2008
Maric, V.
The effect of NPK fertilizer use and planting density on the grain yield of maize was investigated. The research was conducted on a maize hybrid Zenit, three planting densities (22.5 cm, 26 cm, and 30 cm) with the achieved plant arrangement of 63 492, 54 945 and 47 619 plants/ha respectively, and the use of six different ways of fertilizing. Phosphorus and potassium were used in every combination (except control) in the fall in amount of 60 kg/ha. Nitrogen was also used in every combination (except control) in the amount of 120 kg/ha, but was used on a different schedule (spring 100%, fall 30% + spring 70%, fall 50% + spring 50%, fall 70% + spring 30%, fall 100% respectively. The research showed the greatest grain in 14% humidity was achieved with the greatest planting density (22.5 cm), that is the achieved arrangement of 63 492 plants/ha and where the fertilizer was used 70% in the fall and 30% in the spring. The same result was obtained while measuring the yield of fresh corn crib (t/ha) as well as the yield of fresh cob, while the yield of dry cob (t/ha) was the greatest with the nitrogen use of 30% in the fall and 70% in the spring and the greatest planting density. The presence of dry substance in the kernel (%) and the kernel participation in the cob yield (%) were also achieved with the greatest planting density, but where the nitrogen fertilizer was used in its entire amount in the spring.
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