Naslov
Response of maize (Zea mays L.) to soil stress and to P and K fertilization on strong K-fixing soil

Autori
Kovačević, Vlado ; Vukadinović, Vladimir ; Bertić, Blaženka

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

Izvornik
Plant nutrition - for sustainable food production and environment / Ando, T. et al. - Tokyo : Kluwer Academic Publishers, 1997, 315-316

Skup
13th Plant Nutrition Colloquium

Mjesto i datum
Tokyo, Japan, 13.09.1997. - 19.09.1997

Vrsta sudjelovanja
Poster

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
maize ; fertilization ; phosphorus ; potassium ; K-fixing soil

Sažetak
Strong K fixation, alone or in combination with P deficiency, is a factor limiting maize (Zea mays L.) yields on some gleysols of eastern Croatia. In comparison to maize yields in the control treatment (3.8 t ha-1), yield increased for 87% and 42% with the highest level of K (2.1 t K ha-1) and P fertilization (1.1 t ha- 1), respectively. At the same time, the ear- leaf K and P status (on dry matter basis) was increased from 7.0 (acute K-deficiency) to 17.4 mg K g-1, and from 2.8 mg to 4.8 mg P g-1. Improvement of the plant K status resulted in a decrease in ear-leaf Mg from 14.6 to 7.3 mg Mg g-1. Different maize genotypes differ in tolerance to K and P deficiencies. Based on our testing of 14 corn hybrids under deficiency conditions, grain yield of the most susceptible hybrid (2.5 t ha-1) was about 50 % lower in comparison with the most tolerant hybrid. Growing maize hybrids more tolerant of K and P deficiency stress is a viable management option on K-fixing, P-deficient gleysols in eastern Croatia.

Izvorni jezik
Engleski

Znanstvena područja
Poljoprivreda (agronomija)

POVEZANOST RADA