Agriculture and forestry

Tsyhanskyi Viacheslav − candidate of agricultural sciences, associate professor of the department of plant growing and horticulture of Vinnytsia National Agrarian University (21008, Vinnytsia, Soniachna Str. 3, e-mail: tsiganskiyslava@gmail.com).

Tsyhanska Olena – candidate of agricultural sciences, associate professor of the department of forestry and landscape management of Vinnytsia National Agrarian University (21008, Vinnytsia, Soniachna Str. 3, e-mail: lenkatsiganskaya@gmail.com).

Pantsyreva Hanna – candidate of agricultural sciences, associate professor of the department of forestry and landscape management of Vinnytsia National Agrarian University (21008, Vinnytsia, Soniachna Str. 3, e-mail: apantsyreva@ukr.net).

Shevchuk Oleksandr – post graduate student of the department of plant growing and horticulture of Vinnytsia National Agrarian University (21008, Vinnytsia, Soniachna Str. 3).

The article analyzes the influence of the features of the cultivation technology of seed alfalfa and soybeans on the accumulation of biological nitrogen. In particular, the results of research on the under-cover and uncovered methods of growing alfalfa are presented. The features of the accumulation of biological nitrogen by alfalfa under the cover of such crops as white mustard and red mustard are determined. The results on the accumulation of biological nitrogen in the uncovered method of growing without the use of herbicide and with its application are also presented. The features of the influence of soil liming and the treatment of alfalfa seeds with preparations of biological origin on the accumulation of nitrogen are determined. In particular, the effect of the inoculant Rhizobin for bacterization of seed material with active strains of nodule bacteria and the growth regulator Emistym C on the activation of the nitrogen fixation process by alfalfa plants was analyzed. The results of studies on symbiotic nitrogen fixation and the accumulation of biological nitrogen in soybean crops were presented. The features of the accumulation of biological nitrogen by the Sensor and Onyx soybean varieties were determined. The effect of using the biopreparation Regoplant (the latest plant biostimulant from a series of multicomponent preparations, which is based on the synergistic effect of the interaction of biotechnological cultivation products and microelements) and the bioinoculant Anderiz (the preparation includes viable cells of nodule bacteria that have a unique symbiotic relationship to legumes (Mesorhizobium cicero, Bradyrhizobium japonicum, Rhizobium leguminosarum bv. viceae, Rhizobium leguminosarum bv phaseoli, Sinorhizobium sp.) and the phosphorus-mobilizing fungus Penicillium bilaii) on the accumulation of biologically fixed nitrogen by soybean varieties was analyzed. The conducted studies showed that on average over the years of research, alfalfa sowings with the full rate of lime applied to the soil and the combined treatment of seed material before sowing with Rhizobin and Emistim C under bare-root cultivation with the use of herbicide provide biological nitrogen fixation in the maximum amount in the experiment - 236.3 kg/ha. Based on the results of the study on the influence of fertilization and the use of biological preparations on the accumulation of biological nitrogen by soybean crops, it was found that the highest amount of biological nitrogen in the atmosphere of soybean plants, the Sensor variety 144.6 kg/ha and the Onyx variety 164.6 kg/ha on average over the years of research, was recorded in the experimental variants with the application of mineral fertilizers at a dose of P60K60 and pre-sowing seed treatment with the Regoplant preparation (250 ml/t) in combination with foliar top dressing with the Anderiz preparation 2.5 l/t.

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