engleski

The role of genotypes on phosphorus, zinc, manganese and iron status and their relations in leaves of maize on hydromorphic soil

Hydromorphy is a major soil fertility constraint in Europe and North America causing specific nutritional imbalance in soils and crops. Objectives of this study were to examine differences among maize hybrids in phosphorus (P), zinc (Zn), manganese (Mn) and iron (Fe) status in leaves, and to investigate interrelationship among these micronutrients as well as between Zn and P on a hydromorphic soil in Eastern Croatia. Twenty maize (Zea mays L.) hybrids were grown under field conditions of Eastern Croatia in two years. Considerable differences in mean ear-leaf Zn, Mn and Fe contents at silking stage were found ranging from 16.3 to 30.0 mg kg-1 for Zn, from 28.5 to 62.2 mg kg-1 for Mn and from 137 to 222 mg kg-1 for Fe content. Mean ratios among nutrients were at acceptable levels: 146 (P:Zn), 7.6 (Fe:Zn) and 3.72 (Fe:Mn). Differences among the hybrids ranged from 95.1 to 210.4 (P: Zn), 5.3 to 10.4 (Fe: Zn) and for 2.40 to 5.79 (Fe: Mn). Maize hybrids which have higher P:Zn is less acceptable for growing on soils which are either rich in P or moderate in available Zn. Highly significant correlation coefficients between years for mineral content (0.696 for Zn, 0.586 for Mn and 0.525 for Fe) indicated high repeatability estimates within genotypes across the seasons and importance of heredity for nutritional status.

maize hybrids ; zinc ; manganese ; iron ; ear-leaf ; hydromorphic soil ; Eastern Croatia

nije evidentirano