Savich V.I., Belopukhov S.L., Gukalov V.V., Efimov O.E., Borodina K.S.

Sorption properties of root systems as a criterion for adjusting soil fertility models

The paper evaluates the sorption properties of the root systems of rice, wheat, vegetable and fruit crops, and weeds in soils with optimal moisture, irrigation, and the development of anaerobiosis. It is shown that different types and varieties of crops differ in the sorption properties of the roots, which must be taken into account when adjusting the optimal soil properties and fertilizer doses. Thus, the ratio of Ca/Fe in the equilibrium nutrient solution was 72.6 under the rice variety "Liman"; 165.0 under the variety" Spalchik"; 222 under the weed prosyanka; 720 under the weed klubnekamysh. The ratio of Md/Ca, Ca/Mp and Ca/Zn in the non-equilibrium nutrient solution of Knopa (1:1) after growing seedlings was -17.4; 300.0 and 17.2, respectively, under cauliflower; 6.6; 53.9 and 8.7 under early white cabbage. It is proven, that the sorption properties of the root systems of plant species and varieties should be taken into account when adjusting the optima of soil properties and fertilizer systems for the planned crop, upon phytomelioration of soils.

Keywords:ROOTS, SORPTION PROPERTIES, SOIL FERTILITY MODELS, FERTILIZER SYSTEMS