The results of the studies on the effect of the use of biological and chemical preparations sown against the background of different sowing dates on the structure of the crop and the quality of seeds of camelina are reflected. The studies were carried out in 2018-2020 on the experimental plot of NJSC " S. Seifullin Kazakh Agrotechnical University" in Akmola region. As a result of the research, it was found that the highest in terms of yield structure were options with a sowing date of May 25-30. The maximum number of pods on average was noted in the late sowing options, both with the insecticidal (75.2 pcs/plant) and fungicidal (74.7 pcs/plant) treatment of crops sown with Extrasol treated seeds. The number of seeds in the pod did not depend on the combined use of the biological and chemical preparations, but had a slight increase in that indicator when sown at a later date (by 8.6 - 1.1%). The yield of spring camelina slightly changed depending on the use of each preparation separately and exceeded the control by 0.11-0.34 t/ha when sown on May 15-20 and by 0.54-0.76 t/ha when sown on May 25-30. Variants using Extrasol + Piktor significantly increased the yield of camelina seeds. According to the oil content, there was a slight increase in the fat content in the variants treated with the drugs, compared with the control. However, the use of the Extrasol + Piktor complex increased the oil content to 39.74 - 40.05%, which was higher than in the control and in the variant of the combined use of Extrasol with an insecticide and separately. The same pattern was noted for the protein content in the seeds.
The results of a field experiment on the effect of microbiological and chemical plant protection agents on the productivity of camelina seeds are presented. The preparations (seed treatment before sowing was made with Extrasol, during vegetation - with insecticide Proteus and fungicide Pictor) were studied against the background of different sowing dates (15-20 May; 25-30 May). As a control, the version without the use of drugs was investigated. The field experiment was laid in quadruple repetition, the plot area was 63 m2. The seeding method is row seeding with a seeding rate of 6.0 million germinating seeds/ha. The forecrop is the 1st wheat after fallow. The work was carried out in 2018-2020 in the conditions of Northern Kazakhstan. The object of the study are the seeds and plantings of camelina Isilkulets variety. The soil of the site is chernozem, humus content - 2.50-3.89 %, nitrogen - 30.80-81.20 mg/kg, phosphorus - 11-30 mg/kg, potassium 620-770 mg/kg. The seeds were treated with Extrasol solution at the rate of 2 l (10 l of working solution)/t of seeds on the day of seeding. The optimal seeding date for camelina (May 25-30) and the optimal combination of preparations with seed treatment and spraying of crops with fungicide are recommended. The duration of the growing season of camelina in the conditions of Northern Kazakhstan was revealed, which averaged 72-81 days. High productivity was noted with the microbiological preparation Extrasol (seed treatment) and spraying of crops with fungicide Pictor (11.5-16.0 c/ha). A significant (LSD05 = 0.52) increase in seed yield was 0.77 t/ha. It was found that abundant rains during the growing season contribute to increased development and spread of diseases (fusariosis: R = 14.3-21.5 % and P = 27.5-86.4 %; alternariosis: R = 14.3-20.6 % and P = 25.2-84.3 %).
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