Uman NUH | today: 09/06/2020

Formation of yield rape yield with different main tillage in the Right-bank Forest-Steppe

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Category The Agronomy
year 2020 issue Випуск 96 Частина 1
pages 582-592 index UDK 631.52.021
DOI 10.31395/2415-8240-2020-96-1-582-592 (Link)
Abstract In the course of three-year studies done on podzolic chernozem it was found that the replacement of moldboard ploughing by moldboardless loosening influences the conditions of growing spring rape insignificantly, while decreasing the depth of the tills to 10–12 cm leads to the essential decrease of productivity of spring rape sowings. All three years of research differed in weather conditions. Particularly unfavorable conditions for the accumulation of moisture during the autumn-winter period developed in the 2017–2018 agricultural year, when, despite the largest amount of autumn-winter precipitation in three years, their absorption was hampered by the fact that the soil froze to a considerable depth. In the following years, the weather conditions of the autumn-winter period in terms of rainfall were favorable for the accumulation of moisture in the soil before the start of spring field work. In terms of the amount of precipitation per rapeseed vegetation (May-July), the years of research differed little, but in 2019 their distribution by months was more even. Therefore, the last year of our research should be considered the most favorable for the growth and development of spring rape plants, when the highest level of yield was formed. The yield of spring rape was recorded in sections in triplicate of 50 m2. Statistical data processing was performed according to the method of B. A. Dospekhov. Due to the replacement of shelf plowing with flat-cut loosening, the average level of total weediness of rapeseed crops at the beginning of the growing season increased from 92,4 to 100 pieces / m2 with a simultaneous increase in the share of perennial weeds. The same trend persisted in the middle and end of the rapeseed growing season. Reducing the depth of plowing and increasing the depth of flat-cut loosening in our experiments led to an increase in weediness of crops at the beginning of the growing season. By the middle and end of the growing season, the total weediness of rapeseed crops was slightly lower in the variants with deeper tillage, regardless of their methods.
Key words spring rape, soil, plowing, disking, productivity, flat-cut loosening
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