Published in Scientific Papers. Series A. Agronomy, Vol. LXIII, Issue 1
Written by Tatyana BOZHANSKA, Galina NAYDENOVA
A two-year field experiment was conducted at the Experimental Station on Soybean in order to study the effect of foliar feeding by the universal fertilizer Lactofol on the elements that structure soybean seed production. The experiment was carried out as a two-factor by the method of fractional plots. Factorial combinations were made with two initial phases of application of foliar fertilizing (R3 and R5) and with three formulations of leaf fertilizer Lactofol, each administered in two doses (500 and 750 ml/da). According to the results, the characteristics studied were more influenced by the formulation and the dose of foliar fertilizing then the treatment phase. Foliar fertilizing by Lactofol O applied in the onset of flowering at dose of 0.500 ml/da increased the seed yield per plant significantly in both experimental years. In a humid and cooler year, this formulation of leaf fertilizer increases the number of seeds per plant. In conditions of optimal to low soil and air humidity, Lactofol K/Ca (0.750 ml/da) applied in the phenophase of flowering-pod formation (R5) also increases the number and yield of plant seeds, as well as the absolute seed weight.
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