Naslov
Overcomming stalk lodging on K-deficient soil by growing tolerant maize hybrids

Autori
Kovačević, Vlado ; Brkić, Ivan ; Šimić, Domagoj ; Zdunić, Zvonimir

Vrsta, podvrsta i kategorija rada
Sažeci sa skupova, cjeloviti rad (in extenso), pregledni

Izvornik
Proceedings of ESNA (European Society for New Methods in Agricultural Research) XXXIV Annual Meeting / Maksimović, I., Čuvardić, M., Djurić, S. - Novi Sad : Faculty of Agriculture in Novi Sad, 2004, 244-248

Skup
ESNA (European Society for New Methods in Agricultural Research) XXXIV Annual Meeting

Mjesto i datum
Crna Gora; Novi Sad, Srbija, 29.08.2004. - 02.09.2004

Vrsta sudjelovanja
Poster

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
maize; stalk lodging; K-deficient soil; yield; ear-leaf composition; nitrogen; phosphorus; potassium; calcium; magnesium

Sažetak
Growth retardation, chlorosis and inclination maize to stalk lodging (SL) at maturity were observed on some soils of the Eastern Croatia. Strong K-fixation and excess of Mg were found by soil test. Ameliorative K fertilization is recommended for overcoming this problem, but choice of tolerant hybrids could be also reliable solution. Object of this study was testing maize hybrids on these soils. Nutrient concentrations were determined by inductively coupled plasma (ICP) after their microwave digestion in the laboratory of the RISSAC Budapest. Fourteen maize hybrids were grown during the growing season of 1990 on drained gleysoil. Seven hybrids contained Os-1-48 (group A), while remaining seven hybrids contained Os 87-24 (group B) genotype as the male parent. The hybrids of the group A had a considerably lower SL, higher grain yields and lower stalk base P at maturity (means 4.9%, 5.64 t ha-1 and 0.13% P) compared to the B hybrids (59.1%, 4.16 t ha-1 and 0.22% P). Ten maize hybrids were grown during the growing season of 1998 on calcaric fluvisol. Four hybrids (OsSK568exp, OsSK602, OsSK444 and OsSK458exp.) could be designated as a more tolerant (MT: 8.01 t ha-1) and four hybrids (OsSK552, OsSK554, OsSK508 and OsSK497exp.) less tolerant (LT: 4.55 t ha-1) to K deficiency. SL of individual hybrids was from 3.4% (OsSK444) to 65.9% (OsSK497exp.) as well as 15.7% (MT) and 43.0% (LT), respectively. Two hybrids (OsSK552 and OsSK554: mean yield 3.93 t ha-1) have very low ear-leaf (silking stage) K (0.55% K) and the higher levels of Ca (1.01% Ca) and Mg (1.47% Mg) in comparison with OsSK568exp and OsSK602 (8.80 t ha-1, 0.74%K, 0.73% Ca and 1.13% Mg).

Izvorni jezik
Engleski

Znanstvena područja
Poljoprivreda (agronomija)

POVEZANOST RADA