VARIETY OF VARIABLE ALFALFA TAISIA

In order to create alfalfa varieties with high adaptive capacity and promote their cultivation to the North, a biotechnology of coordinated plant-microbial symbiotic selection was developed to create varieties with increased symbiotic efficiency that can grow on uncultured and medium-cultivated, acidic soils. Using this biotechnology, the variety of alfalfa variable Taisia was created and in 2015 was included in the State register of breeding achievements that were allowed to be used. The variety is recommended for cultivation in the North-Western, Central and Volga-Vyatka regions. When growing the traditional method cultivated (without pre-inoculated seed) on medium soil the yield of dry matter in the North-West region was in the range of 6.8–16.0 t/ha, in the Central of 5.6–14.2 t/ha, Volga-Vyatka – 8.4–20.0 t/ha. Pre-sowing inoculation of seeds with complementary strains of nodule bacteria increased the yield of green mass in the North-Western region by 30–177%, in the Central region – by 45–102%. On uncultivated acidic soil (pH 4.6), where alfalfa was not previously grown, without inoculation, the yield of Taisia was 1.85 t/ha of dry matter and 42 kg/ha of seeds. Inoculation with a production strain of nodule bacteria 412b increased the yield to 4.65 t/ha of dry matter and 114 kg/ha of seeds. The efficiency of the symbiosis was 151 and 171%, respectively. Inoculation with a complementary strain of nodule bacteria RCAM 1774 increased the collection of dry matter by 4 times to 9.2 t/ha, seeds – by 8.9 times to 372 kg/ha.