The aim of the present study was to determine the effect of some exogenously applied growth regulators on the grain yield and its structural elements in common vetch (Vicia sativa L.). For achieving it, a three-year field trial was carried out in the period 2008-2010 in the Training-and-Experimental Fields of the Agricultural University – Plovdiv. The experiment was conducted with two Bulgarian common vetch cultivars – Dobrudzha and Obrazets 666, in four replications, the size of the experimental plot being 10 m2. Foliar treatment with the growth regulators RENI and RENI D and the three commercial products – Bormax, Manganese chelate and Molybdenite, was performed in the stage of budding. The results of the three-year experiment clearly show the effect of RENI, RENI D and Bormax on the structural elements of the yield and on the amount of grain harvested from the two common vetch cultivars.
Keywords: common vetch, growth regulators, grain and legume crops.