Naslov
Potassium availability as a limiting factor of maize yields in eastern Croatia (review)

Autori
Rastija, Mirta ; Kovačević, Vlado

Vrsta, podvrsta i kategorija rada
Radovi u zbornicima skupova, cjeloviti rad (in extenso), znanstveni

Izvornik
Proceedings of 17th International Symposium of CIEC, Plant Nutrient Management Under Stress Conditions / El-Fouly M. M., Haneklaus S., Hera C., Rietz R.M., Schnug E., Abdel-Maguid A.A. - Kairo : International Scientific Centre of fertilizers (CIEC) Braunsxchweig - Bucharest, 2009, 465-472

ISBN
977-5041-61-9

Skup
Plant Nutrient Management Under Stress Conditions

Mjesto i datum
Kairo, Egipat, 24.11.2008. - 27.11.2008

Vrsta sudjelovanja
Poster

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
Potassium fixation ; fertilization ; maize ; yield ; leaf nutritional status

Sažetak
Nutritional disorders in maize accompanied with K deficiency have been found on some clay soils in the east Croatia. It is in close connection with strong K-fixation and excess of plant available magnesium (Mg) in soil. Potassium fertilization considerably increased maize yields. For example, in the Mikanovci trial was applied 2670 kg K2O ha-1 and maize yields (3- year means) were increased from 1.93 t/ha to 7.64 t/ha or four-fold. At the same time, K and Mg status in maize leaves were improved (0.60% K, 1.94% Mg and 1.66% Ca on the control ; 1.58% K, 0.95% Mg and 1.64% Ca on the highest K treatment). Similar trends were found for the other ameliorative K rates experiments on K- fixing soil. However, under moderate K availability and absence K-fixing conditions, responses of maize to K fertilization were considerably lower and yield increases were up to 13% only.

Izvorni jezik
Engleski

Znanstvena područja
Poljoprivreda (agronomija)

POVEZANOST RADA