Camelina seeds yield depending on the use of different preparations and sowing dates in the north of Kazakhstan

Abstract

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 %).