A technology of sunflower cultivation with application of some biological methods

The article presented the results of researches conducted by the Department of agriculture of Voronezh State Agricultural University on sunflower cultivation with application of biological technology. The sunflower variety Poseidon was used in the trial, the seed sowing rate was 50 ths seeds per ha. The trial was conducted in conditions of the Central-Chernozem zone (Khokholsky district of Voronezh region) in 2011-2013. The trial presented binary sowings of sunflower with perennial leguminous grasses with application of barley straw and sideration of stubble as a fertilizer. The studied technology of sunflower cultivation with perennial leguminous grasses does not provide the application of mineral fertilizers and preparations of plant protection. In comparison with the traditional technology (cultivation of sunflower in a single-crop planting), the binary sowings showed more rational consumption of available moisture (38-58 mm) and major nutrients during the growing season of the crop, an increase of soil detritus (0.029-0.032 abs.%) and promoted substantial increase (0.22-0.33 t/ha) of sunflower seed yield.