SYMBIOTIC POTENTIAL OF PERSPECTIVE BREED S OF LEGUMINOSE GRASSES MELILOT AND ALFALFA ON SOUTH ERN CARBONATE SOILS IN NORTHERN KAZAKHST AN

The data on two years studying of perspective breeds of alfalfa and melilot with inoculation by leg- ume bacteria Rhisobium meliloti are provided in this article. The research results have shown that the highest biologi- cal fixing of molecular nitrogen was on the following melilot breeds KD - 1823, KD - 1687 and KD - 1828 and a lfalfa L - 1334, L - 1348, L - 1341, L - 1330 and L - 1329. These breeds with inoculation considerably exceeded similar variants of control by knob quantity and percent of the consumed nitrogen that was for us the basis to recommend these variants for the subsequent selection works.