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List of publications on a keyword: «coefficient of competitiveness»

  • Advantages of Growing Field Peas in Mixed Crops With Rapeseed and Mustard

    Book Chapter
    Culture. Science. Education: modern trends
    Author:
    Andrei V. Bezgodov
    Work direction:
    Глава 2. Наука
    Abstract:
    In field experiences studies on growing field peas in single-component and mixed seeding with spring rape and white mustard were conducted in the Middle Urals. The crop capacity was increased by 10,8% as well as the total yield was increased by 2.3 times up to 2.14 t / ha by the use of spring rape as a supporting and compacting crop in sowng peas with a seeding rate at 0.6 million / ha. It was found out that crop productivity of peas was decreased by 19.4% when the seeding rate was established at 0.4 million / ha, and the crop productivity of spring rape remained at the level of pure sowing – 1.23 t / ha. The total yield, in comparison with the pure sowing of peas, increased by 2.1 times from 0.93 to 1.98 t / ha. Mustard is less suitable as a supporting crop, although it ripes earlier and does not thrive in contrast to spring rape. The total yield and ratio of land equivalents in a mixture with spring rape is higher than with mustard and ranged from 1.66 to 1.98. Peas accounts for the bulk of the total yield (LERab = 0.81...1.48). The coefficients of competitiveness and aggressiveness of the studied crops in mixed sowing indicate the dominant role of field peas in the pea-rape and pea-mustard agrocenoses. The awned and foliose morphotype of field peas when grown in a mixture with mustard showed themselves equally, their competitiveness and aggressiveness coefficients were in a close range – Crab = 2.37...4.57; CAab = 0.72...1.87. The awned morphotype of field peas had the greatest aggressiveness and competitiveness when cultivated in a mixture with spring rape – CRab=6.78...17.80; CAab = 3.35...5.79. The foliose morphotype of field peas occupied an intermediate position and had a good competitive ability with less aggressiveness towards spring rape – Crab = 2.64...2.66; CAab = 2.06...2.13.
    Keywords:
    field peas, Austrian winter pea, spring rape, white mustard, mixed crops, seed production, resistance to lodging, yield, ratio of land equivalents, coefficient of competitiveness, coefficient of aggressiveness
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