Effect of various biological control agents (BCAs) on drought resistance and spring barley productivity

Abstract

The aim of the article is to study the effect of various biological agents of biofungicides on plant resistance to drought and formation of spring barley crops. Endophytic bacteria (Bacillus subtilis), rhizospheric bacteria (Pseudomonas fluorescens), actinomycetes (Streptomyces sp.), and micromycetes (Trichoderma viride) were used as bioagents of biofungicides. Preparations based on biological agents were used to treat spring barley seeds. The studies were carried out in laboratory and field conditions. In the conditions of the model artificial acute drought, it was found that seed treatment with Streptomyces sp. Stimulates the leaf and root growth, as well as increases peroxidase activity in the leaves. The maximum content of proline was during seed treatment with Pseudomonas fluorescens. An increase in the content of chlorophyll was observed when treating with Trichoderma viride seeds. In the field conditions, Pseudomonas putida and Streptomyces were more efficient by the content of proline in seedlings. In terms of the spring barley yield, seed treatment with Streptomyces sp., Pseudomonas putida and Bacillus subtilis was more efficient. Streptomyces sp., Pseudomonas putida and Bacillus subtilis are promising for increasing barley resistance to drought.

A study of the effect of mineral fertilizers as a factor in improving environmental safety and productivity of crop rotation

“…Before the experiment, the soil had pHKCl 5.1, humus content was 3.28% (according to Kirsanov). The experiment was conducted by Dospekhov's method [2]: the number of options was 5, different doses of fertilizers were used over 28 years. The repetition of the experiment was 4-fold, the placement of variants was complicated, the size of the plot was 14m x 10m, the area of the plot was 140 m 2 , the accounting area for two-factor studies was 24 m 2 .…”

“…The yield depends on the integrated use of mineral fertilizers, whose consumption is determined by the stage of development and maturation of the crop and the composition of the soil, its fertility, meteorological conditions, and the level of moisture, which affects the efficiency of fertilizing [2,3,5,6].…”

The Effectiveness of the Use of Organomineral Aminovell Fertilizer on Sunflower Crops in the Soil and Climatic Conditions of the Republic of Tatarstan

“…Органика в чистом виде экологична и почти безвредна, но не сбалансирована по составу. Кроме того, легко ошибиться с дозировкой, получив нейтральный или отрицательный эффект [3,4]. Минеральные удобрения выпускаются предприятиями с учетом потребностей культур и сезонности внесения и требуют точного соблюдения дозировок.…”

Potential of the indirect and direct beneficial effects of the use of Trichoderma koningii, Aspergillus niger and Mucor sp. on eggplants plants: Plant growth and systemic resistance induction

“…induced systemic resistance by stimulating these genes. Induced resistance is persistent and generally nonspecific to biotic and abiotic constraints (Safin et al 2020;. Phoka et al (2020) and Safin et al (2020) revealed that the treatment with Trichoderma spp.…”

“…Induced resistance is persistent and generally nonspecific to biotic and abiotic constraints (Safin et al 2020;. Phoka et al (2020) and Safin et al (2020) revealed that the treatment with Trichoderma spp. increased catalase and peroxidase activities and that this increase could be related to lignification.…”