Optimization of the production process of sunflower agrocenosis using growth regulators
Journal Title: «Таврійський науковий вісник» - Year 2018, Vol 101, Issue
Abstract
The purpose of the research is to study the influence of growth regulators Vermimag and Vermiodes applied for the pre-sowing seed treatment and spraying of the stands of sunflower hybrid NK Brio on their photosynthetic and seed yield. The study was conducted in 2013-2016. The soil in the experimental site was turf, podzolic, medium-loamy. Seeds were sown at a rate of 70 thousand / hectare of germinable seeds. The total area of the plot is 70 m2, the registration area is 50 m2. Placement of plots is systematic for a four-time repetition. The research is carried out in accordance with existing commonly used methods. It was established that the growth regulators Vermimag and Vermiodis influenced field germination, leaf area and photosynthetic activity of sunflower agrocenoses and the productivity of the culture. The highest rates of the leaf area increment in the flowering phase (54.8 thousand m2/ha, or 14.7 thousand m2/ha more than in control) were under the pre-sowing treatment of seeds of hybrid NC Brio with the growth regulator Vermiodex at a rate of 4 l/ton and spraying plants in the vegetation period with the same preparation twice at a rate of 4 l/ha. In this variant, the photosynthetic potential of crops was 2.874 million m2/ha per day, or 0.662 million m2/ha more compared with the control. The studies have shown that on average over the years of research the best yield gains were observed and exceeded the control in the variants of joint pre-sowing treatment of seeds and single-time spraying with growth regulator Vermiodis by 9.7-12.6%, under two-time spraying by 14.2-16.4%.
Authors and Affiliations
В. М. Сендецький
Keywords
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