INFLUENCE OF THE BIO-DON HUMIC PREPARATION ON THE COMPOSITION AND DYNAMICS OF NUTRIENT ELEMENTS IN THE SYSTEM "SOIL-PLANT"
The purpose of the research was to evaluate the effectiveness of application the Bio-Don humic preparation in winter wheat cultivation and to study its effect on the crop yields and grain quality, as well as on the nutrients and humus dynamics in soil. Various methods of using the humic preparation were studied: its pre-sowing application into soil and its use for leaves treatment during the plants’ growing season. As result of three years of research it was found that the most effective way of using the above preparation was its presowing application into soil combined with double treatment of the plant leaves. It is shown that inclusion of the humic Bio-Don preparation into the technology of winter wheat cultivation contributed not only to yields increase, but to obtaining of high quality grain with a higher content of gluten. It has been proved that the use of the humic preparations leads to mobility of phosphates due to plants growth stimulation and enhancement of plants biological activity.