The aim is to study how presowing usage of biologies Mycofriend, Mikovital and Florobacillin influences on biometric indicators of maize, its productivity and soil moisture holding capacity. Using mycorrhizal fungi and nitrogen-fixing bacteria, we have received positive results about their influence on plant growth and development and maize yield forming. Leaf surface area in variants with fungi Trichoderma harzianum Rifai (Mycofriend bio-based product), and Tuber melanosporum Vittad (Mikovital bio-based product) and bacteria Bacillus subtilis Cohn. (Florobacillin bio-based product) was counted on 30th, 60th, 90th and 120th days of vegetation and was estimated by 11.2–90.0% higher compared to the control. Leaf mass and root system mass exceeded control indicators by 24.0–48.9%, respectively. Plants height in these accounted periods was higher by 4.0–31.5% compared to the control. In addition, in these variants, soil moisture holding capacity increased by 7.3–38.1%, share of soil lumps smaller than 0.25 mm decreased by 2.8–7.2%. Grain yield of Maize in variants with mycorrhizal fungi and nitrogen-fixing bacteria was 1.64–2.68 t/ha higher than in the control. It should be noted that presowing usage of fungus Trichoderma harzianum Rifai on plants seeds, provides better efficiency on plants’ growth and development and their productivity.

Purpose. To determine photosynthetic productivity of miscanthus gigantheus and switchgrass as affected by leaf water content under mycorrhization of their roots. Methods. Field, laboratory, and statistical. Results. The obtained results indicate that the use of vesicular-arbuscular mycorrhizal (VAM) preparations Mycofriend (fungus Trichoderma harzianum RIFAI.), Mikovital (fungus Tuber melanosporum VITTAD.), and nitrogen-fixing preparation Florobacillin (Bacillus subtilis Cohn.) helps to increase water content in the leaves of such cereal bioenergy crops as miscanthus gigantheus and switchgrass. In particular, in all vegetation periods, in the treatments with Mycofriend, the water content in miscanthus gigantheus leaves was higher by 11.2–20.1% than in the control, while in switchgrass it was higher by 16.9–20.5% than in the control. In the treatments with Mikovital and Florobacillin, leaf water content ranged in miscanthus from 7.1 to 15.6% and from 5.8 to 11.7%, respectively, and in switchgrass, from 11.6 to 14.7% and from 7.0 to 10.2%, respectively. The photosynthetic productivity of these crops is affected by the water content in the leaves. There is a close correlation between these factors (correlation coefficient 0.95–0.96). Conclusions. Root application of biological plant products Mycofriend, Mikovital and Florobacillin improves water content in the leaves of cereal bioenergy crops, such as miscanthus gigantheus and switchgrass, and increases their photosynthetic productivity.

No abstract

No abstract

Purpose. To investigate the effect of pre-sowing seed treatment with vesicular-arbuscular mycorrhizal (VAM) and bacterial preparations on the leaf water content and photosynthetic productivity of agricultural crops (winter wheat, corn, sunflower and soybean) under mycorrhization of their roots. Methods. Field, laboratory, and statistical. Results. The results of studies on determining the effect of pre-sowing treatment of seeds of such agricultural crops as soft winter wheat, common corn, annual sunflower and soybean culturally vesucular-arboscular drugs Mikovital (mushroom Tuber melanosporum VITTAD.) Micofrend (mushroom Trichoderma harzianum. (bacteria Bacillus subtilis Cohn.) on the water content of leaves and the productivity of photosynthesis of plants by mycorrhization of their root system. It was found that the implementation of this measure provides a steady increase in the water content of leaves and the productivity of photosynthesis of agricultural crops. In particular, the water content of leaves of soft winter wheat plants, common corn, annual sunflower and cultivated soybeans for the use of the preparations Mikovital, Mikofrend and Florobatsilin was 1.6–77.3 % more than in the control. According to the indicators of the water content of the leaves, the productivity of photosynthesis of crops increased by 8.3–57.1 % in comparison with the control, which indicates a significant effect of this factor on the growth and development of plants. Conclusions. Pre-sowing seed treatment with vesicular-arbuscular products Mikovital, Mycofrend, and bacterial product Florabacillin promotes a steady increase in the leaf water content and photosynthetic productivity in winter bread wheat, maize, annual sunflower, and soybean.