Magnesium content in the leaves of winter wheat in a long-term fertilization experiment

Abstract

Long-term experiments facilitate the observations of changes in soil properties affected by agricultural activity as well as the reactions of crops to those properties. The aim of the study was the assessment of the relationship between the soil pH as well as contents of organic carbon, total nitrogen, available forms of phosphorus, potassium (K av), magnesium (Mg av) and the magnesium content in flag leaves (Mg fl) in winter wheat. There was also determined the correlations between the Mg fl content and the nitrogen (N fl), phosphorus, potassium (K fl) and calcium (Ca fl) contents in those leaves. The Mg fl content was at-the-highest-level linearly positively correlated with soil pH and its richness in Mg av. The dependence of the Mg fl content on soil properties and the wheat leaves chemical composition was best described by polynomial equations of the 2 nd degree, except for the K av and K fl contents. The Mg fl content depending on the Mg av content × soil pH and Mg av × K av interaction. The winter wheat containing more N fl and Ca fl and less K fl, accumulated more Mg fl.