M.S. Brodowska, M. Kurzyna-Szklarek
University of Life Sciences in Lublin, Department of Agricultural and Environmental Chemistry, Lublin, PL


In soils which are agricultural used in Poland content of cooper is in range 1 – 100 mg Cu·kg-1. In plants cooper affects development and construction of tissues, participate in nitrogen transformations as well as protein and vitamin C synthesis. In turn deficiency of copper causes both quantitative and qualitative reduction in yield value, and is also a cause of severe diseases of farm animals. Content of zinc in agricultural polish soils is in range 10 – 80 mg Zn·kg-1. In plants participate in proteins synthesis and carbohydrate binding. It is also responsible for nitrogen balance affecting on efficiency of fertilizing with this element. Both excess and deficiency copper and zinc can have toxic effect on plants developments. The appropriate amount of Cu and Zn in plants depends, among other things, on the chemistry of agriculture. A strict three-year pot experiment was conducted to analyze the effect of sulfur, magnesium and different ratios of N: P: K fertilization on Cu and Zn content in crop plants. Test plants were spring forms of rapeseed, wheat and barley. The experiment has been established using a complete randomization method on soil from arable layer of brown soil with granulometric composition of sandy clay. Analysis of the results showed significant influence of sulfur and magnesium fertilization on the content of analyzed heavy metals. The experiment also confirmed the significant effect of the ratio of fertilizers on Cu and Zn concentration in both generative and vegetative organs. Increasing sulfur doses resulted in a decrease in copper and zinc content in the main and secondary crops of test plants in most objects.

Keywords:copper, zinc, mineral fertilization, crop plants