Cereals form the most important group of plants cultivated by man. The aim of the work is to study the effect of ultraviolet led emitter in the processing of seeds of grain crops to improve sowing performance. The objects of the study were the seeds of winter and spring wheat, winter triticale, naked oats. Seeds were treated with ultraviolet LEDs in the range of radiation in the UV zone for 5, 10 and 15 minutes, with average illumination energy of 3.137 W/m2. Growth strength, laboratory germination, shoot height, primary root length and root rot infestation were evaluated. In the course of studies, a positive effect of ultraviolet treatment of seeds of winter wheat, winter triticale and oats was established. Ultraviolet radiation with a dose of 1882 J/m2 (seed treatment for 10 minutes) increased the growth strength and germination of winter wheat. Shoot height and root length were better when irradiated for 5 min with a dose of 941 J/m2. The proposed UV treatment of seeds improves the technology of production of hydroponic feed, taking into account modern requirements for energy conservation and obtaining environmentally friendly products.
The article presents studies on the impact of ultraviolet light-emitting diodes and silicon-containing preparation “Nanosilicon” on the germination of seeds of meadow clover ‘Ranny 2’, alfalfa (Medicago varia) ‘Victoria’ and fodder galega ‘Yaltinsky’. The purpose of the studies was to investigate the synergism of the simultaneous exposure to ultraviolet radiation and nanosilicon to increase the rate of seed germination. The study was investigating ultraviolet radiation zone “A” (UV-A) for a period of 5 minutes. The average irradiance was 3.137 W/m2. A decrease to 2-3% of the amount of hard seeds of meadow clover was noted in the variants: first treatment was with ultraviolet light, and then with “Nanosilicon” (UV irradiation + “Nanosilicon”) and vice versa: first, treatment was with “Nanosilicon”, and then with ultraviolet (“Nanosilicon” + UV irradiation). In addition, a decrease to 7.9-9.5% of the seeds contamination was detected for fodder galega in almost all studied variants. The use of the preparation “Nanosilicon” and UV radiation on the seeds of alfalfa contributed to an increase in the length of the sprout up to 2.4 cm, the root up to 1.5 cm, the degree of development of seedlings up to 3.0 points, the growth rate up to 29.8%.
Experimental data on the fodder and seed productivity of varieties of meadow timothy, awnless brome, meadow fescue with three-year use of herbage are presented. The obtained yield is justified by its structure (stem density, height, stem mass, leafiness, number and length of inflorescences, weight of 1000 seeds).
The biological properties of plants, their mutual relations under different growth conditions and at different periods of their life, must be known for obtaining highly productive agrophytocenoses with participation of a meadow clover (Trifolium pratense L.). Botanical composition and fodder productivity of perennial grasses in agrocenoses with participation of meadow tetraploid clover Kudesnik were studied in 2014-2017. It was revealed that in the first and second years of use the agrophytocenosis, the yield of green mass was formed due to meadow tetraploid clover, the share of its participation in the first mowing was at level of 71-87% and 64-97% respectively. Specific weight of clover in multispecies agrocenoses considerably decreased by the third year of use: in the first mowing up to 32-68%, in the second - up to 8-52%. At the same time, the percentage of long-term herbaceous grasses increased: meadow timothy (Phleum pratense L.) - up to 34-54%, eastern galega (Galéga orientális Lam.) - up to 33%, changeable alfalfa (Medicago x varia Martyn) - up to 22-54%, lotus corniculatus (Lotus corniculatus L.) - up to 14-19%. The proportion of weed admixture in single-species clover planting was 12%, in agrocenoses - 2-14%. The grass mixtures clover + timothy and clover + alfalfa + timothy were less infested by weeds. High yield of dry weight of single-species sowing of meadow tetraploid clover was obtained in the first two years of use - 7.8 and 6.5 tons / ha, respectively. By the third year of use, the productivity of clover has decreased to 2.9 t / ha. On average, for three years of use, the highest yield (6.2-6.3 t / ha) was formed by agrocenoses meadow tetraploid clover + meadow timothy and meadow tetraploid clover + changeable alfalfa + meadow timothy.
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