Abstract
In 2015–2017, in the proving grounds of the Institute of Agroecology and Plant Production of Wrocław University of Environmental and Life Sciences, field studies were carried out on the different row spacing and the application of the Asahi SL biostimulant on soybean development and yield. The field study employed a split-plot method, with four replications, and two variable factors: First factor – varying row spacing (15 cm and 30 cm); second factor – the application of the Asahi SL biostimulant (control – no application, foliage stage – BBCH 14–15, budding stage – BBCH 51, foliage and budding stage – BBCH 14–15 and BBCH 51). The variable row spacing factor (15 cm, 30 cm) significantly influenced soybean post-harvest residue yield, while not affecting the harvested seed yield or nutrient efficiency. Wider row spacing (30 cm) favored increased post-harvest residue yield, increased Ca content in seeds and Mg content in stems. The use of the Asahi SL biostimulant had a positive effect on increased seed and post-harvest residue yield, as well as crude fat and total protein yield per hectare, compared to the untreated control.
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