Influence of the shelter-belt on the containment of amino acids bound in humic acids in various kind of soils

Investigations were carried out on the composition and content of amino acids bound in humic acids (HA) isolated from mineral and mineral-organic soils under the shelter-belt (biogeochemical barrier). It was confirmed that the distance from the edge of the shelter-belt and the kind of soil on which the biogeochemical barrier is localized, exerts some considerable influence on the total amount of amino acids bound in HA. The shelter-belt appearing on mineral soils causes a decrease in the total amount of bound amino acids in major periods of sampling. A contrary occurrence was observed in mineral-organic soils.