The efficiency of rhizobia use in the soybean cultivation on chernozem of the Western Ciscaucasia

Abstract

In the period of 2008-2014, we carried out the field experiments to evaluate the efficiency of soybean inoculation with Russian and foreign preparations of nodule bacteria on various subtypes of chernozem of the Western Ciscaucasia. All studied inoculants ensured an increase of soybean yield: on ordinary chernozem – on average, by 18.8 % (0.34 t/ha), on leached and typical chernozems – by 14.9 % (0.30 t/ha), on meadow chernozem of rice fields – by 59.1 % (1.04 t/ha). The protein content from inoculation increased by 1.7-1.9 %, in rice crop rotations – by 4.0-4.9 %. There was no significant difference in efficiency between Russian and foreign inoculants. In 2018-2019, in a field experiment on leached chernozem we established the varietal specificity by reaction to inoculation with various strains of rhizobia in new soybean varieties Bars and Irbis, confirming the expediency of selecting complementary pairs in the system soybean variety – rhizobia strain.