Naslov
Response of maize to fertilization with zinc sulphate

Autori
Josipović, Marko ; Kovačević, Vlado ; Bavec, Franc

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

Izvornik
"Fertilization for sustainable plant production and soil fertility" Proceeding of the 11th World Fertilizer Congress of CIEC, volume I / Cleemput Van O.m Haneklaus, S. ; Hofman, G. ; Schnug E. ; Vermoese - Braunschweig : Budimpešta : Beč : University Gent, 1998, 270-276

Skup
11th World fertilizer congress "Fertilization for sustainable plant production and soil fertility"

Mjesto i datum
Gent, Belgija, 07.09.1997. - 13.09.1997

Vrsta sudjelovanja
Poster

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
maize; genotypes; zinc

Sažetak
Zinc deficiency has been observed at the early growth stage of seed-maize crops grown on neutral to slightly alkaline calcareous soil of the Eastern Croatia. Sensitivity to zinc deficiency was induced by weather conditions (cold and wet period promoting retardation of maize growth and development of typical chlorosis) and by genotype (normal status of one parent and stress status of remaining parent of maize hybrid under identical field conditions). In this study, our previous investigations of zinc nutrition problem (zinc deficiency findings in seed-maize crops grown on Osijek eutric cambisol) and response of maize inbred lines (parents of maize hybrids) to zinc fertilization, were shown. By the our previous investigation, in the aerial part of maize with developed symptoms of zinc deficiency, satisfied Zn concentrations and excess of iron and aluminum were found. However, by spraying of maize with 0.75% ZnSO4.7H2O solution (June 2, 1990), plant became normal color following a few days, while untreated maize showed further zinc deficiency symptoms. Maize chlorosis were in close connection with the higher soil pH and the higher extractable Zn status. Ten maize inbred lines were grown on Djakovo slightly alkaline and drained gleysol (the soil A) in the growing season 1995 and on Osijek neutral eutric cambisol (the soil B) in the growing season 1996. The trials were established in four replications (the plot measured 20.3m2 = 4 rows of 7m in lengths ; plant density 55172 plants/ha). Two rows of each genotype were treated with the solution of zinc sulfate (0.75% ZnSO4.7H2O), while remaining two were a control. The first treatment of spraying was at the beginning of June and the second treatment following ten days. The trial plot received fertilization as follows: 135 kg N, 80 kg P2O5 and 120 kg K2O/ha. Maize genotypes response to foliar spraying with 0.75% ZnSO4.7H2O solution was less expressed in the first year of testing: average grain yields were similar (2890 kg/ha and 2992 kg/ha, for control and spraying, respectively) while only two genotypes responded by yield increases (17% and 13% higher yields by the Os84-49 and by the Os84-24, respectively). However, in the second year of testing average grain yields were 4078 kg/ha (control) and 4418 kg/ha (spraying): by five genotypes (Os84-24, Os84-49, Os84-28, Os64-9 and Os86-39) grain yields increased from 11% to 18% as affected by ZnSO4.7H2O application.

Izvorni jezik
Engleski

Znanstvena područja
Poljoprivreda (agronomija)

POVEZANOST RADA